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  Subjects -> ELECTRONICS (Total: 179 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 5)
Advances in Electronics     Open Access   (Followers: 78)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 33)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 315)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 36)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 8)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 269)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 105)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 86)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 92)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 51)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 191)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 97)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 66)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 70)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 56)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 19)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 40)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 71)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 46)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 58)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 24)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 5)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 12)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 12)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 24)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 24)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access  
Journal of Field Robotics     Hybrid Journal   (Followers: 2)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 168)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 28)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 18)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 33)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 53)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Similar Journals
Journal Cover
International Journal of Nanoscience
Journal Prestige (SJR): 0.201
Citation Impact (citeScore): 1
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0219-581X - ISSN (Online) 1793-5350
Published by World Scientific Homepage  [119 journals]
  • Effect of Modified Nanoclay Composite on Blended PVDF/PEG Electrolyte
           Membranes for Fuel Cell Applications
    • Authors: P. Bahavan Palani, K. Sainul Abidin, R. Kannan, S. Rajashabala
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      This research work describes the fabrication of polymer blend nanocomposite membranes using the solution casting method. These membranes were fabricated with Poly (Vinylidene Fluoride) (PVdF) as host, Poly (Ethylene Glycol) (PEG) in steps of 2[math]wt.% as blending polymer and Montmorillonite (MMT) nanoclay particles in steps of 3[math]wt.% which were used as received. The protonated MMT was synthesized through an ion exchange process with column chromatographic technique. The prepared membrane’s performance was investigated using different characterization techniques of Thermo Gravimetric Analysis (TGA), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), water uptake, IEC and electrochemical impedance spectroscopy. Thermal stability was decreased while adding PEG into PVDF but it is controlled with the addition of MMT on PVDF/PEG blend matrix. Moreover, It is noticed that, the increase of water uptake, IEC by the increasing additive concentration of PEG and MMT. XRD studies reveal the increased amorphous phase with uniform exfoliation of nanoclay particles. The highest proton conductivity value of 0.127[math]S cm[math] is obtained with 9[math]wt.% of MMT in the PVdF/PEG/MMT composite membranes at room temperature with 100% Relative Humid (RH) condition and 10 V.% of sulfonation. The blended nanocomposite membranes fulfill the requirements of proton exchange membrane for fuel cell application.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:32:06Z
      DOI: 10.1142/S0219581X17600420
       
  • Nonlinear Optical Behavior of Nanostructured 4-Dimethyl-Aminopyridinium
           Dihydrogen Phosphate
    • Authors: G. Muruganandi, M. B. Jessie Raj, T. C. Sabari Girisun
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Optical nonlinearity of 4-dimethyl aminopyridinium dihydrogen phosphate (DMAPDP) was studied using continuous wave of diode pumped Nd:YAG laser (532[math]nm, 50[math]mW). The nonlinear refractive index, nonlinear absorption coefficient and nonlinear optical (NLO) susceptibility of the sample were found to be in the order of 10[math][math]cm2/W, 10[math][math]cm/W and 10[math] esu respectively. The observed self defocusing effect was used to demonstrate the optical limiting action at 532[math]nm. Initially, XRD analysis showed that DMAPDP crystallizes in triclinic crystal system with centrosymmetric space group [math]. Thermal studies explored that the material undergoes an irreversible endothermic transition at 192[math]C which correspond to the decomposition of material. SEM image portrays the formation of nanoparticles with grain size in the range of 45–170[math]nm. Hence 4-dimethyl aminopyridinium dihydrogen phosphate nanoparticles can be used as potential candidate for optical limiting applications.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:32:00Z
      DOI: 10.1142/S0219581X17600365
       
  • Europium-Doped Hydroxyapatite Nanorods: Influence of Silver Doping
    • Authors: S. Asha, Nimrodh Ananth, Sujin P. Jose, M. A. Jothi Rajan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      In this work, we report the influence of silver nanoparticles of different size on the optical behavior of the europium-doped hydroxyapatite nanorods. The presence of ionic, plasmonically visible and silent (ultra-small) silver nanoparticles on the surface of europium-doped apatite and its influence on its luminescent behavior were discussed. It was found that ionic silver exhibited a concentration-dependent enhancement in emission at the excitation of europium. For plasmonically visible and silent silver nanoparticles, the emission observed was due to the contribution of the ligand passivating the europium-doped hydroxyapatite nanoparticle surface. These nanoparticles due to its luminescent and biocompatible nature can be used for bioimaging applications.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:53Z
      DOI: 10.1142/S0219581X17600341
       
  • Reactive DC Magnetron Sputtered ZnO Thin Films for Piezoelectric
           Application
    • Authors: M. Abinaya, K. M. Dhanisha, M. Manoj Cristopher, P. Deepak Raj, K. Jeyadheepan, M. Sridharan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Zinc oxide (ZnO) films have been sputter coated over glass substrates at different cathode powers. Influence of cathode power on physical characteristics of ZnO samples was analyzed using X-ray diffractometer (XRD), field emission-scanning electron microscopy (FE-SEM), UV-Visible spectrophotometer and four-point probe (FPP) method. XRD patterns exhibited [math]-axis-oriented ZnO and enhanced crystallinity with increase in cathode power due to the increase in adatom mobility. Uniformly arranged spherical grains were observed from FE-SEM images. The grain size increased from 25 to 40[math]nm with increase in power. All samples exhibited high electrical resistance (G[math]) which is compatible for piezoelectric application.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:47Z
      DOI: 10.1142/S0219581X1760047X
       
  • Investigation on Structural and Optical Properties of Copper Telluride
           Thin Films with Different Annealing Temperature
    • Authors: R. Nishanthini, M. Muthu Menaka, P. Pandi, P. Bahavan Palani, K. Neyvasagam
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      The copper telluride (Cu2Te) thin film of thickness 240[math]nm was coated on a microscopic glass substrate by thermal evaporation technique. The prepared films were annealed at 150[math]C and 250[math]C for 1[math]h. The annealing effect on Cu2Te thin films was examined with different characterization methods like X-ray Diffraction Spectroscopy (XRD), Scanning Electron Microscopy (SEM), Ultra Violet–Visible Spectroscopy (UV–VIS) and Photoluminescence (PL) Spectroscopy. The peak intensities of XRD spectra were increased while increasing annealing temperature from 150[math]C to 250[math]C. The improved crystallinity of the thin films was revealed. However, the prepared films are exposed complex structure with better compatibility. Moreover, the shift in band gap energy towards higher energies (blue shift) with increasing annealing temperature is observed from the optical studies.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:40Z
      DOI: 10.1142/S0219581X17600468
       
  • Influence of Annealing Time on the Structural, Morphological and Optical
           Properties of ZnO Films
    • Authors: E. Sujitha, M. Manoj Christopher, K. M. Dhanisha, M. Abinaya, P. Deepak Raj, M. Sridharan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Zinc oxide (ZnO) thin films have been synthesized by thermally oxidizing the direct current magnetron sputtered zinc (Zn) films at 500[math]C for different annealing time periods (3–5[math]h) in ambient air. Influence of annealing time on the structural, morphological, optical and electrical properties of ZnO films was studied using X-ray diffractometer, field emission-scanning electron microscopy (FE-SEM), UV–Vis spectrophotometer and two-probe method, respectively. ZnO films exhibited hexagonal crystal structure with (1 0 1) as preferential orientation plane, and the crystallite size of the films increased from 30[math]nm to 83[math]nm on increasing the annealing time. Pebble-like surface morphology was observed from the FE-SEM micrographs. Optical band gap of the films varied between 3[math]eV and 3.5[math]eV for different annealing times. Electrical resistance of the ZnO films was decreased with increase in the annealing time, which is due to the improvement in the crystallinity.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:34Z
      DOI: 10.1142/S0219581X17600444
       
  • 2-Amino-5-Nitropyridinium Halides (Br, Cl): An Efficient Frequency Doubler
    • Authors: C. Indumathi, S. Alfred Cecil Raj
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      2-Amino-5-nitropyridinium halides (2A5NPBr)/(2A5NPCl) were synthesized by dissolving 2-amino-5-nitropyridine in hydrobromic/hydrochloric acid. Nanoparticles of 2A5NPBr and 2A5NPCl were attained by hydrothermal method. For comparison and estimation of mechanical properties, single crystals of the samples were grown by slow evaporation process. SEM analysis shows the formation of nanoparticles of 2A5NPBr and 2A5NPCl with average grain size of 50 and 100[math]nm, respectively. UV-Vis analysis reveals that the materials possess low cut-off wavelength and a wide optical transmission window. By Vickers test, the Meyer index (n) was estimated to be 1.33 for 2A5NPBr and 2.49 for 2A5NPCl crystals. The SHG efficiency of 2A5NPBr and 2A5NPCl nanoparticles was calculated to be 1.5 and 4.3 times that of well known NLO material KDP. The role of cations in demonstrating the desired NLO properties were discussed in detail.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:28Z
      DOI: 10.1142/S0219581X17600389
       
  • Phase Purity Analysis and Optical Studies of Bi2O3 Nanoparticles Suitable
           for Photocatalytic Activity
    • Authors: M. Malligavathy, D. Pathinettam Padiyan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Bismuth oxide was prepared using hydrothermal route and the effect of pH on the phase of Bi2O3 reported. Phase pure [math]-Bi2O3 was prepared at the pH of 13 and its phase purity was confirmed from the X-ray diffraction pattern. At the pH of 10, 11 and 12 the hydrothermal synthesis yields Bi(OH)3, ([math], [math]-Bi2O3) & Bi2O4 and mixture of [math]-Bi2O3 & Bi2O4, respectively. The optical band gaps were calculated from reflectance spectra using the Kubelka–Munk relation and the values decrease from 3.050(3) to 2.686(3) eV with the increase in pH value. Photoluminescence intensity decrease with the increase of pH value indicated the increase in the charge separation efficiency. In the application point of view, the photocatalytic activity of the samples was evaluated for methyl orange and among the four samples, [math]-Bi2O3 degraded 67% within 4[math]h. The degradation of dye was analyzed using pseudo first-order kinetics and the rate constant value was 0.0045(3) min[math] with the correlation coefficient of 0.983.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:22Z
      DOI: 10.1142/S0219581X17600407
       
  • Studies on Magnetron-Sputtered NiO/Si3N4 Thin Films
    • Authors: K. M. Dhanisha, M. Manoj Christopher, M. Abinaya, P. Deepak Raj, M. Sridharan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      The present work deals with NiO/Si3N4 layers formed by depositing nickel oxide (NiO) thin films over silicon nitrate (Si3N[math] thin films. NiO films were coated on Si3N4-coated Si substrate using magnetron sputtering method by changing duration of coating time and were analyzed using X-ray diffractometer, field emission-scanning electron microscopy, UV–Vis spectrophotometer and four-point probe method to study the influence of thickness on physical properties. Crystallinity of the deposited films increases with increase in thickness. All films exhibited spherical-like structure, and with increase in deposition time, grains are coalesced to form smooth surface morphology. The optical bandgap of NiO films was found to decrease from 3.31[math]eV to 3.22[math]eV with upsurge in the thickness. The film deposited for 30[math]min exhibits temperature coefficient resistance of [math]1.77%/[math]C as measured at 80[math]C.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:15Z
      DOI: 10.1142/S0219581X17600390
       
  • Resistive Switching Behavior of Au/TiO2/NiCr Structure
    • Authors: M. M. Cristopher, K. M. Dhanisha, M. Abinaya, P. Deepak Raj, K. Jeyadheepan, M. Sridharan
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Thin film memristor behavior depends on the choice of top and bottom electrode material and metal oxide layer. In the present work, the influence of the top and bottom electrode layers on the electric field-induced resistance switching phenomena of TiO2-based MIM was studied. Au/TiO2/NiCr and NiCr/TiO2/Au structures were fabricated by depositing TiO2 active layer by reactive dc magnetron sputtering technique between thermally evaporated NiCr and Au electrodes. TiO2 layer was sputtered with a cathode power of 150[math]W keeping the other deposition parameters constant. TiO2 films were analyzed by X-ray diffractometer, field emission scanning electron microscopy and UV–Visible spectrophotometer to investigate their structural, morphological and optical behavior. Structural studies of the films reveal that the samples were amorphous. And the [math]–[math] analysis for the fabricated MIM structure was analyzed.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:09Z
      DOI: 10.1142/S0219581X17600353
       
  • Immobilization Effect of Morphological, Thermal and Optical Properties in
           Biotemplate on Zinc Oxide Nanocomposite from Chitosan
    • Authors: M. Karpuraranjith, S. Thambidurai
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      Biotemplate-based zinc oxide nanocomposite was effectively prepared via simple chemical precipitation route. The functional groups of amino (–NH2), hydroxyl (–OH) and O–Zn–O were confirmed and characterized by FTIR spectroscopy. The structural and morphological properties were confirmed by XRD, UV–Vis DRS, HR-SEM and TEM analyses. The elemental composition of carbon, nitrogen, zinc and oxygen was confirmed by energy-dispersive X-ray analysis (EDAX) and Brunauer–Emmett–Teller high surface area of materials was estimated to be 52.49[math]m2/g, respectively. Thermogravimetric analysis (TGA) shows that biotemplate on zinc oxide nanocomposite has higher thermal stability than chitosan matrix. The results demonstrate that biotemplate on zinc oxide matrix causes immobilization effect among the two components. Therefore, chitosan–ZnO nanocomposite has a microcrystalline morphological structure and also good thermal stability, so it can be a promising material for sensors, medical, tissue engineering and wastewater treatment applications.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:31:02Z
      DOI: 10.1142/S0219581X17600456
       
  • Investigation on V2O5 Thin Films Prepared by Spray Pyrolysis Technique
    • Authors: A. Nancy Anna Anasthasiya, K. Gowtham, R. Shruthi, R. Pandeeswari, B. G. Jeyaprakash
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      The spray pyrolysis technique was employed to deposit V2O5 thin films on a glass substrate. By varying the precursor solution volume from 10[math]mL to 50[math]mL in steps of 10[math]mL, films of various thicknesses were prepared. Orthorhombic polycrystalline V2O5 films were inferred from the XRD pattern irrespective of precursor solution volume. The micro-Raman studies suggested that annealed V2O5 thin film has good crystallinity. The effect of precursor solution volume on morphological and optical properties were analysed and reported.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:30:55Z
      DOI: 10.1142/S0219581X17600377
       
  • Simulation Studies on the Interaction of Graphene and Gold Nanoparticle
    • Authors: J. Meena Devi
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      In this computational study, the interaction between a single layer graphene sheet and a gold nanoparticle is investigated employing molecular dynamics (MD) simulation at room temperature. The interactions between the graphene and gold nanoparticle were explored for three different types of gold nanoparticle, namely, bare gold nanoparticle, methyl terminated alkane thiol-coated gold nanoparticle and hydroxy terminated alkane thiol-coated gold nanoparticle. The interactions between the graphene and gold nanoparticle have resulted in the adsorption of gold nanoparticle on the surface of graphene. The structural properties of the graphene–gold hybrid nanostructures were found to be influenced by the capping layer of the gold nanoparticle.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:30:48Z
      DOI: 10.1142/S0219581X17600432
       
  • Theoretical Investigation of H2 Interactions on ZnO Cluster: DFT Approach
    • Authors: A. Aruna Devi, S. Vidya, P. K. Rai, B. G. Jeyaprakash
      Abstract: International Journal of Nanoscience, Volume 17, Issue 03, June 2018.
      A computational study on adsorption and dissociation mechanisms of H2 molecule on ZnO cluster was analysed using Density Functional Theory (DFT) approach in Gaussian 09 software. The stable sites for hydrogen adsorption were inferred from the adsorption energy and bond length. Further investigations such as Mulliken charge, HOMO–LUMO energy gap and intrinsic reaction coordinate (IRC) were performed for the stable adsorption sites. It infers that the (ZnO)6 cluster has the highest binding energy of 1.851[math]eV (O-site) and the least binding energy of [math]3.865[math]eV (O-site), showing most favorable size for both adsorption and dissociation of H2 molecule. The IRC plot clearly shows the dissociation mechanism of hydrogen on the ZnO cluster.
      Citation: International Journal of Nanoscience
      PubDate: 2018-05-21T09:30:37Z
      DOI: 10.1142/S0219581X17600419
       
  • Antibacterial Activity of Silver Nanoparticles Using Jasminum auriculatum
           Stem Extract
    • Authors: S. Balasubramanian, U. Jeyapaul, S. Mary Jelastin Kala
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In the present study, bio-meditated silver nanoparticles have been synthesized using Jasminum auriculatum stem extracts. The silver nanoparticles were confirmed using UV-visible and FT-IR spectra. The size and morphology of silver nanoparticles were confirmed using XRD, SEM and EDAX techniques. The antibacterial activity of green synthesized silver nanoparticles was assessed by disc diffusion method against human pathogens. The antibacterial studies indicate that green synthesized silver nanoparticles have several pharmaceutical applications for the management of deadly human pathogens.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-18T06:23:49Z
      DOI: 10.1142/S0219581X18500114
       
  • Optical and Electronic Analysis of Pure and Fe-Doped ZnO Thin Films Using
           Spectroscopic Ellipsometry and Kramers–Kronig Method
    • Authors: Maryam Motallebi Aghgonbad, Hassan Sedghi
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In the present work, pure and Fe-doped ZnO thin films were deposited on glass substrates by sol–gel method. Zinc acetate and iron nitrate were used as the starting material and dopant source, respectively. The concentration of Fe doping was 6[math]at.% and 8[math]at.%. The optical and electronic properties of pure and Fe-doped ZnO thin films such as refraction index, extinction coefficient, dielectric function and optical band gap energy of the layers were obtained by spectroscopic ellipsometry method in the wavelength range of 300–900[math]nm. The incidence angle of the layers kept 70[math]. Also data obtained by Kramers–Kronig relations were used for comparison. The influence of Fe-doping concentration on the optical and electronic properties of thin films was studied. The transmittance data of ZnO thin films showed that 6[math]at.% Fe-doped ZnO thin film has the highest transmittance value. Dielectric function of pure ZnO films was found to be higher compared with Fe-doped ones. Also it can be deduced from the results that Fe doping influences the optical band gap energy of thin films.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-18T06:23:48Z
      DOI: 10.1142/S0219581X18500138
       
  • Investigations on Photocatalytic, Antimicrobial and Magnetic Properties of
           Sol–Gel-Synthesized Ga-Doped ZnO Nanoparticles
    • Authors: Jaskaran Singh Malhotra, Arnav Sharma, Arun Kumar Singh, Sanjeev Kumar, Bhupendra Singh Rana, Sanjeev Kumar
      Abstract: International Journal of Nanoscience, Ahead of Print.
      Gallium (Ga)-doped zinc oxide (ZnO) nanoparticles were synthesized using simple and cost-effective sol–gel method. X-ray powder diffraction studies illustrated the crystalline nature of Ga-doped ZnO nanoparticles with hexagonal wurtzite structure. Fourier-transform infrared spectroscopy and energy dispersive X-ray fluorescence confirmed the Ga[math] incorporation in ZnO. The photocatalytic activities of all the synthesized samples were performed on methylene blue dye solution exposed under UV light. The antibacterial activities of the synthesized nanoparticles were investigated against Aeromonas liquefaciens and Shigella flexeneri gram-negative pathogenic strains. The experimental results clearly demonstrated significant enhancement in photocatalytic and antimicrobial activity of ZnO nanoparticles doped with optimum concentration of Ga. Room temperature vibrating sample magnetometer measurements illustrated weak ferromagnetism in all the Ga-doped ZnO samples.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-18T06:23:48Z
      DOI: 10.1142/S0219581X1850014X
       
  • Magnetotransport Study on Iron Doped Novel 2D Nanoribbons via Electron –
           Acoustical Phonon Interactions
    • Authors: Ankur Pandya, Prafulla K. Jha
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The electron transport parameters such as electron energy relaxation rate and phonon limited electron resistivity for iron (transition metal) doped 2D nanoribbons of armchair graphene nanoribbon (aGNR) and h-boron nitride nanoribbon (h-BNNR) have been calculated via hot electron acoustical phonon interactions on the basis of acoustical deformation potential (ADP) coupling mechanism. We have performed the investigation for the lower concentration ([math]%) of iron doping under the influence of externally applied magnetic field at low temperature to room temperature regime. The hot electron acoustical phonon relaxation rates are observed with electric field and under constant applied magnetic field. The doping of iron increases the electron energy relaxation rate with respect to their pristine counter parts. Moreover, the pristine h-BNNR exhibits less electron energy relaxation rate with respect to pristine aGNR. Upon applying magnetic field on Fe doped armchair GNR as well as Fe-doped h-BNNR the electron energy relaxation rate reduces down to a considerable extent with respect to their pristine counterparts. Moreover, under the impact of magnetic field, the acoustical phonon restricted electrical resistivity of Fe-doped GNR is considerably low compared to pristine GNR.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-18T06:23:47Z
      DOI: 10.1142/S0219581X18500102
       
  • Substrate and DLARC Layers Selection for High Efficiency Solar Cell
    • Authors: M. Ismail Fathima, K. S. Joseph Wilson
      Abstract: International Journal of Nanoscience, Ahead of Print.
      Optical losses are one of the important parameters that affect the efficiency of solar cell. Various light-trapping techniques are used to reduce the optical losses, especially reflectivity loss. Antireflective coating (ARC) is used to reduce the reflectivity losses in the solar cell. In this paper, we have analyzed the reflectivity of double layer ARC (DLARC) in the solar cell using transfer matrix method. The reflectivity of various combinations of DLARC materials with a suitable substrate material is analyzed in the visible and near IR region. It is found that ZnS/Ge DLARC on Si substrate solar cell provides minimum reflectance in the range of wavelength 550–950[math]nm. It is also found that zero reflectance occurs at 550[math]nm. This minimum reflectance also depends on the angle of incidence. Here it is continuously maintained up to the angle of incidence from 0[math] to 20[math]. From these investigations, it is concluded that ZnS/Ge DLARC is one of the suitable DLARCs on Si substrate in 550–950[math]nm range of wavelength.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-18T06:23:46Z
      DOI: 10.1142/S0219581X18500126
       
  • Universal Validity of Einstein Relation and Size-Dependent Viscosity and
           Surface-Active Characteristics of Nanofluids
    • Authors: Arya Sukumaran, Kishan Das, Kamla Rawat, H. B. Bohidar
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In this report, the general validity of the Einstein viscosity relation, [math], [math], ratio of solution to solvent viscosity), is examined in nanofluids where monodisperse spherical nanoparticles (polystyrene latex spheres) of size 50–400[math]nm were dispersed in water at room temperature, 25[math]C. In addition to viscosity, we also measured contact angle, [math], and surface free-energy, [math], as function of particle concentration and observed that the universal relation [math], [math], remained valid, where [math] may be relative viscosity, contact angle or surface free-energy and [math] is a shape-dependent constant and is 2.5 in the Einstein limit. Thus, the Einstein relation has a wider validity than is generally thought encompassing both bulk and surface properties of nanofluids. Furthermore, we extend the study to establish an empirical relation between intrinsic viscosity [[math]] and Huggins interaction parameter [math], with particle size [math], which obeyed: [math] or [math], where [math] is in nm, [[math]] is in cc/g, [math] is in (g/cc)2 and [math], [math] and [math] are constants of particle size. Identical expressions could be established for contact angle and surface free energy. These remarkable observations have not been reported hitherto.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-11T03:45:40Z
      DOI: 10.1142/S0219581X18500060
       
  • Siver Nanoparticles Toxicity in Brine Shrimp and its Histopathological
           Analysis
    • Authors: Supicha Kachenton, Varanut Whangpurikul, Niwat Kangwanrangsan, Tawewan Tansatit, Wannee Jiraungkoorskul
      Abstract: International Journal of Nanoscience, Ahead of Print.
      Silver nanoparticles (Ag NPs) are interesting nanotechnology materials with borderless applications in medical science, environmental science, material science and are also used in various kinds of industrial household products. Increasing usage of Ag NPs every year leads to increased risk of nanomaterial contamination in the environment, especially natural water sources with harmful effects in aquatic animals, and to ecosystem disruption. In the present study, Ag NPs toxicity was determined using brine shrimp Artemia salina as a model. A total of 10 adult brine shrimps were incubated in solutions containing various Ag NPs concentrations for 24[math]h at room temperature. Percentages of brine shrimp dead were recorded and calculated to determine the lethal concentration. We found the LC[math] of Ag NPs is 3521.13[math]mg/L. Histopathology study was done using survival brine shrimps after 24[math]h of incubation with 25% LC[math] Ag NPs concentration. Tissue processing and H&E staining to remark pathological areas with emphasis on intestinal tract, were also done. Ag NPs obstruction was found in intestinal lumen. The intestinal epithelial cells showed hyperplasia and blebbing, increased mucous thickening, detachment from basement muscle lining, and necrosis area. These findings indicated the effect of Ag NPs and their negative impact on aquatic animals which might lead to further disruption of ecosystem.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-11T03:45:40Z
      DOI: 10.1142/S0219581X18500072
       
  • Walnut Shell-Templated Ceria Nanoparticles: Green Synthesis,
           Characterization and Catalytic Application
    • Authors: Asghar Zamani, Ahmad Poursattar Marjani, Khadijeh Alimoradlu
      Abstract: International Journal of Nanoscience, Ahead of Print.
      Ceria (CeO2) nanoparticles (NPs) have been produced from cerium nitrate and walnut shell as a worthless agricultural waste by a thermal decomposition method followed by open air calcination. These NPs further were characterized using powder X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy, energy dispersive X-ray spectroscope and Fourier transform infrared spectroscopy. Moreover, particle sizes can be tuned by changing cerium source/biomass ratio. To test the catalytic activity of cerium NPs as a heterogeneous catalyst, we selected three-component synthesis of 3,4-dihydroquinoxalin-2-amine. Also, the efficiency of CeO2 NPs as a support for palladium NPs and subsequent use in aerobic oxidation of alcohols has been investigated. TEM image of a recovered catalyst indicates the formation of 12 nm sized palladium NPs within the cerium oxide NPs. The catalyst is quite effective for the oxidation of primary and secondary benzylic alcohols into their corresponding aldehydes and ketones under atmospheric pressure of air. Oxidation of secondary aliphatic alcohols is performed in oxygen atmosphere.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-11T03:45:40Z
      DOI: 10.1142/S0219581X18500084
       
  • Nitrogen Doping of Hexagonal and Cubic Ge2Sb2Te5 Nanocrystals: An Ab
           Initio Study
    • Authors: Henry Odhiambo, George Amolo, Nicholas Makau, Korir Kiptiemoi, Herick Othieno
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The effect of nitrogen doping on the structural, electronic and optical properties of hexagonal and cubic Ge2Sb2Te5 (GST) has been investigated from first principles. The nitrogen content was set to 10 at.% and 25 at.%, in which it was found that the hexagonal phase becomes more stable, whereas the cubic phase becomes more unstable with increasing nitrogen content. A difference in optical reflectivity of about 8% was calculated for pure hexagonal and cubic phases. Pure GST was found to possess a higher reflectivity contrast in the infrared spectral range, whereas doped GST had a higher reflectivity contrast, which increased with rising nitrogen content, in the visible and ultraviolet spectral range. The optical conductivity was found to fall with increasing nitrogen content, in agreement with experiment and other theoretical studies.
      Citation: International Journal of Nanoscience
      PubDate: 2017-12-11T03:45:40Z
      DOI: 10.1142/S0219581X18500096
       
  • Preparation of Fenpropathrin Nanoemulsion by Phase Inversion Temperature
           Method and Its Study on Performance
    • Authors: Kun Qian, Hengke Zhao, Lin He
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In this study, 8% fenpropathrin nanoemulsion was prepared by phase inversion temperature (PIT) method with 8% xylene and 4% solvent oil 150# as the solvent. The characteristics of this nanoemulsion were tested and compared with emulsifiable concentrate (EC). The size of 8% fenpropathrin nanoemulsion was 62.99[math]nm, which was much smaller than that of 20% fenpropathrin EC (459.00[math]nm). The mixed surfactants were added in fenpropathrin nanoemulsion with DBS-Ca:LAE at 1:2 to increase the stability, and the concentration of the mixed surfactants at 10[math]wt.% showed the highest stability and much better synergism and surface activity. The absolute zeta potential of fenpropathrin nanoemulsion was much higher than that of EC, which can effectively prevent the cohesion between particles. Field control test also revealed that the 200[math]mg/L, 100[math]mg/L and 50[math]mg/L fenpropathrin nanoemulsion had higher efficacy than 100[math]mg/L fenpropathrin EC (contrast pesticide) in 4th, 7th, 15th days, respectively. In conclusion, nanoemulsion has a great application prospective in the future.
      Citation: International Journal of Nanoscience
      PubDate: 2017-10-19T09:11:29Z
      DOI: 10.1142/S0219581X18500011
       
  • Acoustics and Transport Properties of PEG Blended with CuO Nanoparticles:
           A Novel Application to Heat Transfer
    • Authors: Susmita Kamila, V. R. Venu Gopal, B. M. Satish
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The present investigation reports the acoustics and transport properties of a series of colloidal dispersion of nanocopper oxide in polyethylene glycol (PEG-400). The data are presented for five different CuO nanofluids of varying concentration in PEG prepared by the ultrasonication technique. The synthesized powder samples were characterized for their sizes and arrangement by X-ray Diffraction analysis (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), which shows the particulate size to be of nanoscale with elongated shape. Similarly, the size and stability of nanofluids were studied by zeta potential and particle size analysis. Besides, ultrasonic velocity, viscosity measurement show better dispersivity of nanoparticles and molecular environment of the nanofluids, whereas the enhanced thermal as well as electrical conductivities of nanofluids can make them suitable for use as heat transfer fluids.
      Citation: International Journal of Nanoscience
      PubDate: 2017-10-19T09:11:28Z
      DOI: 10.1142/S0219581X18500059
       
  • The Influence of the Substitution of Transition Metals on Pristine C20: A
           DFT Study
    • Authors: Debolina Paul, Jyotirmoy Deb, Barnali Bhattacharya, Utpal Sarkar
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The stabilities and reactivities of two transition metal ([math], Zn)-doped structures of C[math] fullerene have been investigated by density functional theory approach. We have observed a noticeable structural change in pristine C[math] due to the substitution of one of its carbon atom by Cu or Zn atom. From our findings, it is found that the energy gap of C[math]Cu and C[math]Zn increases with respect to pristine C[math], thus making the two doped fullerenes more stable than their pristine counterpart. The reactivity parameters such as chemical hardness, chemical potential and electrophilicity index for these structures are also studied. Interestingly, our calculations reveal that both the doped fullerenes obey the maximum hardness principle and minimum electrophilicity principle. Also, from the electronic absorption spectra analysis, it can be inferred that the maximum absorption peak of the two heteroatom-substituted fullerenes C[math]Cu and C[math]Zn are shifted towards the longer wavelength region as compared to the pure C[math] fullerene, which clearly indicates that a red shift is introduced on account of doping.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:17Z
      DOI: 10.1142/S0219581X17600262
       
  • Effect of Surface Plasmon-Based Improvement in Optical Absorption in
           Plasmonic Solar Cell
    • Authors: Partha Sarkar, Bansibadan Maji, Aritra Manna, Saradindu Panda, Asish Kr Mukhopadhyay
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In the last few years, plasmonics has attracted much attention and has been included in the principal domains of nanophotonics that can manage optical fields at the nanodimension level. Its exquisite characteristic is to increase the electromagnetic fields at the nanometer scale particularly in the solar cell. In the plasmonic discipline, noble metals used as nanoparticles in which the density of the electron gas which oscillates at surface plasmon frequency at that time also enhances absorption via scattering. So the usage of plasmonics in solar cells offers better possibility of improving the performance through absorption, because the optical spectrum loss is principal as a part of the overall loss for the solar photovoltaic cell. So we investigated the impact of the nanoparticle size for the enhancement of extinction in terms of absorption and scattering by using surface plasmon resonance, and additionally studied the finite-difference time domain (FDTD)-based proposed model and found various plasmonic fields components and characterized optical enhancement in the plasmonic thin film solar cell.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:17Z
      DOI: 10.1142/S0219581X17600286
       
  • Opto-Electronic Properties of Green Synthesized ZnS Nanostructures
    • Authors: Sujata Deb, P. K. Kalita, P. Datta
      Abstract: International Journal of Nanoscience, Ahead of Print.
      ZnS nanostructures are synthesized by a wet chemical route using starch as green capping agent under nitrogen environment. The as-prepared nanostructures are characterized structurally, optically and electrically. X-ray diffraction (XRD) spectra confirm that the zinc sulfide (ZnS) nanoparticles have cubic phase (zinc blende). UV–Vis spectrum of the sample clearly shows that the absorption peak exhibits blue shift compared to their bulk counterpart, which confirms the quantum confinement effect of the nanostructures. Its photoluminescence (PL) spectrum shows near band gap emission at 392[math]nm and extrinsic emission at 467[math]nm. The particle sizes calculated from XRD and UV studies are in fair agreement with high resolution transmission electron microscopy (HRTEM) results. Starch is found to be a noble capping agent in bringing quantum confinement. The synthesis under nitrogen environment has been observed to produce quality products by reducing the oxide traces. Moreover, the I–V characteristics under dark and illumination show that ZnS can be more suitable as photodetector.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:17Z
      DOI: 10.1142/S0219581X17600328
       
  • Investigation of Microstructural and Mechanical Properties of Al
           5083-ZrSiO4-Gr Hybrid Composite
    • Authors: T. Hariprasad, K. Varatharajan, S. Ravi
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In this present work, an attempt is made to compare the microstructural, mechanical and tribological properties of Al 5083-5% and 10% Gr, Al 5083-5% and 10% ZrSiO4 composite with Al 5083-5, 10% Gr-5 and 10% ZrSiO4 hybrid composite. The samples were prepared by using the stir casting technique, and the characterizations of composites and hybrid composite were observed by using SEM, EDAX and X-ray diffraction (XRD). The mechanical properties such as hardness, tensile, compressive strength of hybrid composite were found to be better than those of composites. The wear test was carried out by using a pin-on-disc wear tribometer by varying parameters like normal load (5, 10[math]N), sliding speed (1, 1.5, 2[math]m/s) with constant sliding distance (2000[math]m). The worn surface of the samples is examined by using SEM, and the wear properties of the hybrid composite are found to exhibit superior wear resistance properties than composites.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:16Z
      DOI: 10.1142/S0219581X17600298
       
  • Theoretical Tight-Binding Study of Electronic Band Dispersion in
           Ferromagnetically Ordered Graphene-on-Substrate
    • Authors: Rashmirekha Swain, Sivabrata Sahu, G. C. Rout
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The graphene-on-substrate in the presence of impurity exhibits ferromagnetism. In the present paper, we propose a tight-binding Hamiltonian model which consists of electron hopping upto-third-nearest-neighbors. The graphene-on-substrate develops a gap of few meV. This Hamiltonian incorporates a gap of energy [math] at A sub-lattice and a gap of energy [math] at B sub-lattice. The Hamiltonian describes the impurity effect at A and B sub-lattices with the impurity potential describing hole and/or electron doping. The on-site Coulomb interaction at A and B sub-lattices is described by Hubbard type repulsive Coulomb interaction which is considered within the mean-field approximation having ferromagnetic magnetization of two different magnitudes at the sub-lattices. The total Hamiltonian is solved by Zubarev’s Green’s function technique. The temperature-dependent ferromagnetic magnetizations are solved self-consistently taking [math] grid points of the electron momentum. The electron band dispersion splits into four for A site and four for B site and the combined band dispersion exhibits eight bands for up/down spin orientations. The evolution of the band dispersion is investigated by varying different model parameters of graphene.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:16Z
      DOI: 10.1142/S0219581X17600304
       
  • Study on Structural and Optical Properties of Sb2S3 and CdI2 Composite
           Thin Films Deposited by Thermal Vapor Deposition
    • Authors: Vikas Lahariya, Sumeet Kumar
      Abstract: International Journal of Nanoscience, Ahead of Print.
      Thin films of Sb2S3 and CdI2 composites were deposited by thermal vapor deposition method on a glass substrate. The structural and optical properties have been investigated as a function of the film thickness. Three samples were deposited with thickness of 160[math]nm, 210[math]nm and 380[math]nm. The samples were characterized by X-ray diffraction (XRD), UV–visible (UV–Vis) absorption spectroscopy and photoluminescence (PL) spectroscopy. The XRD result confirms the orthorhombic structure of Sb2S3 peaks. The bigger crystals are formed with the increase of the thickness of the film. The band gaps of the deposited composite thin films were found to be in range 2.17–1.48[math]eV and suggest the possibility of band gap tunability in the visible region with the changing the thickness of the film. The PL study reveals the intense emission due to band to band recombination with emission in the red region corresponding to trap states.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:16Z
      DOI: 10.1142/S0219581X1760033X
       
  • Tight-Binding Model Study of Tunneling Spectra of Monolayer
           Graphene-on-Substrate
    • Authors: Himanshu Sekhar Gouda, Sivabrata Sahu, G. C. Rout
      Abstract: International Journal of Nanoscience, Ahead of Print.
      We report here the theoretical model study of antiferromagnetic ordering in graphene. We propose a tight-binding model Hamiltonian describing electron hopping up to third-nearest neighbors in graphene. The Hamiltonian describing inequivalence of [math] and [math] sublattices in graphene-on-substrate is incorporated. The Hubbard-type repulsive Coulomb interaction is considered for both the sublattices with same Coulomb energy. The electron–electron interaction is considered within mean-field approximation with mean electron occupancies [math] at [math] sublattice and [math] at [math] site with [math] and [math] being the antiferromagnetic magnetizations at [math] and [math] sublattices, respectively. The total Hamiltonian is solved by Zubarev’s techniques of double time single particle Green’s functions. The magnetizations are calculated from the correlation functions corresponding to the respective Green’s functions. The temperature-dependent magnetizations are solved self-consistently taking suitable grid points for the electron momentum. Finally, the electron density of states (DOS) which is proportional to imaginary part of the electron Green’s functions is calculated and computed numerically at a given temperature varying different model parameters for the system. The conductance spectra show a gap near the Dirac point due to substrate-induced gap and magnetic gap, while the van Hove singularities split into eight peaks due to two different sublattice magnetizations and two different spin orientations of the electron in graphene-on-substrate.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:15Z
      DOI: 10.1142/S0219581X17600274
       
  • Enhancement of the Metallic Behavior of Graphene due to Coulomb
           Interaction in the Paramagnetic Limit: A Tight-Binding Study
    • Authors: Rudrashish Panda, Sivabrata Sahu, G. C. Rout
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The pristine graphene is a zero band gap semiconductor with valence and conduction bands touching each other at Dirac points. The graphene-on-substrate exhibits a small gap at the Dirac points. The microscopic Hamiltonian describes the nearest-neighbor [math]-electron hopping with tight-binding approach. Graphene-on-substrate exhibits a gap at the Dirac points where the energy at A sublattice is raised by [math] and the energy at B sublattice is lowered by energy [math] leading to asymmetry in the two sublattices. Further, we have introduced impurities at both the sublattices. The Coulomb interaction in graphene-on-substrate is described by Hubbard-type Coulomb interaction with energy U. The Coulomb interaction is treated in the calculation within the mean-field approximation in the paramagnetic limit. The temperature-dependent site-independent electron occupancies at both the sublattices are calculated and computed self-consistently. The difference between the electron occupancies of both the sublattices introduces a charge gap. The effect of charge gap on the electronic band dispersion in graphene-on-substrate is investigated by varying different model parameters of the system like Coulomb energy, substrate-induced gap, temperature, total band filling and impurity concentrations. It is observed that both the valence and conduction bands are shifted above the Fermi level exhibiting a charge gap between the bands. As a result, the partially filled valence band exhibits metallic behavior.
      Citation: International Journal of Nanoscience
      PubDate: 2017-07-26T06:09:15Z
      DOI: 10.1142/S0219581X17600316
       
  • Electronic and Magnetic Properties of Fe Atomic Chain and Fe Atomic Plane:
           An ab initio Study
    • Authors: D. P. Rai, Sandeep, A. Shankar, P. K. Patra, R. K. Thapa
      Abstract: International Journal of Nanoscience, Ahead of Print.
      The electronic and magnetic properties of Fe atomic wire and atomic plane have been theoretically investigated from full potential linearized augmented plane wave (FPLAPW) method within a frame work of density functional theory (DFT). This work is based on the comparative study of number of Fe nanochains with infinite length and infinitely spread Fe nanosheet. A most commonly adopted GGA approximation is used for electron exchange correlation. In our calculation, the property of Fe-chain is predicted to be magnetic metal with the presence of deep valley (in Spin-up DOS) and a peak (in Spin-down DOS) at Fermi level ([math]) shows the antisymmetric DOS. The presence of antisymmetric DOS is a signature of exchange splitting between the degenerated d-states. The splitting between t[math] states is very prominent in Fe-chain which enhances the magnetic moment. The magnetic moment decreases with the increase in number of Fe-chains.
      Citation: International Journal of Nanoscience
      PubDate: 2017-06-02T08:16:53Z
      DOI: 10.1142/S0219581X17500247
       
  • Synthesis, Structural, Optical and Dielectric Studies on Carbon Dot-Zinc
           Oxide Nanocomplexes
    • Authors: S. Ajin Sundar, N. Joseph John
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In the present manuscript, we have reported the synthesis, structural, optical, AC conductivity and dielectric studies of carbon dot-zinc oxide (CDZO) nanocomplexes. CDZO nanocomplexes were synthesized by the wet chemical method. The refinement of X-ray powder diffraction data reveals that the sample possesses hexagonal structure of ZnO. The low intensity diffraction peaks corresponding to carbon come to existence, it is suggested that phase segregation has occurred in the CDZO nanoparticles. The strong absorption band observed in the UV region for the prepared samples can be attributed to the band edge absorption. Dielectric property and AC conductivity have been studied as a function of frequency (100[math]Hz and 1[math]kHz) of the applied AC signal in the temperature range 30[math]C to 150[math]C. The result showed that AC conductivity increases with increase of temperature. Dielectric loss and DC conductivity increase with increase of temperature.
      Citation: International Journal of Nanoscience
      PubDate: 2017-06-02T08:16:52Z
      DOI: 10.1142/S0219581X17500211
       
  • Fabrication of Millimeters-Sized Poly(Divinylbenzene) Foam Shells from
           Controllable Double Emulsion in Microfluidic Device
    • Authors: Xiaojun Wang, Jiayi Zhu, Ting Shao, Xuan Luo, Lin Zhang
      Abstract: International Journal of Nanoscience, Ahead of Print.
      A geometrically confined dripping was employed to enable precise control over the dimension and structure of millimeters-sized double-emulsion precursors of poly(divinylbenzene) foam shells in a new kind of double Y-shaped compound channels. Due to the 3D axial-symmetric microfluidic device, a more stable and robust flow field was maintained to obtain a continuous and regular emulsification. Various factors were systematically investigated for the precise size control of dripping in confined channel geometry, such as outlet channel size, fluid properties and flow rates. It was seen that phase properties and synergistic effects of main factors played key roles in determining droplet size. Thus, we used the optimized microfluidic approach to fabricate predetermined size foams to satisfy inertial fusion energy experiments, ranging from 4 to 4.6[math]mm in diameter with a 50–300[math][math]m wall thickness and a coefficient of variation [math]%. The results presented in this work provided a practical guideline for creating size-desired polymersome from comparable double emulsions.
      Citation: International Journal of Nanoscience
      PubDate: 2017-05-26T08:11:40Z
      DOI: 10.1142/S0219581X17500235
       
  • New Polymer Systems for Use in Organic Photovoltaics
    • Authors: M. Orlova, S. Didenko, D. Saranin, O. Rabinovich, A. Panichkin, I. Borzykh
      Abstract: International Journal of Nanoscience, Ahead of Print.
      In this paper, new polymers for use in organic photovoltaics were investigated. PPBI, PNBI and copolymer MULT are considered as a potential alternative or an effective dopant for P3HT and PCBM. The choice of these materials allows us to find out new information on the prospects and properties of heterocyclic polymers — for thermal stability and resistance to the environment for organic solar cells. The levels of HOMO and LUMO of new heterocyclic polymers were measured, and the results were compared with those of P3HT: PCBM. The level of new polymer MULT photoluminescence was determined. The absorption blend for P3HT: PCBM peak absorption shift was detected by adding 5% (by mass) of the new polymer MULT, the value of 30–40[math]nm to longer wavelengths. Data obtained by cyclic voltammetry showed deep HOMO levels of heterocyclic polymers in values of about [math]6[math]eV, which is promising in terms of acceptor properties.
      Citation: International Journal of Nanoscience
      PubDate: 2017-05-17T02:36:21Z
      DOI: 10.1142/S0219581X17500223
       
 
 
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