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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
Electronic Materials Letters
Journal Prestige (SJR): 0.704
Citation Impact (citeScore): 2
Number of Followers: 4  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1738-8090 - ISSN (Online) 2093-6788
Published by Springer-Verlag Homepage  [2352 journals]
  • Quantum Dot Light-Emitting Diodes Employing Phosphorescent Organic
           Molecules as Double Emission Layers
    • Abstract: This work presents hybrid quantum dot light-emitting diodes with double emission layers. Blue quantum dots were deposited by spin-coating for the first emission layer. Then, for the second emission layer, red phosphorescent organic molecules, Ir(piq)3, were deposited by thermal evaporation without host materials. These unique bichromatic devices showed two distinct electroluminescent (EL) peaks with similar intensities at 10 V; then, the variation of the EL spectra with applied voltage was investigated systematically. The findings of this study demonstrate the potential for white EL devices using fewer materials in the near future. Graphical
      PubDate: 2019-05-01
  • Selection of CVD Diamond Crystal Size on a CVD Pad Conditioner for
           Improved Lifetime
    • Abstract: Pad conditioners are important consumables for semiconductor chemical mechanical planarization processes. Recently, a new concept has been developed to improve the performance and lifetime of a pad conditioner by depositing diamond film on a uniformly patterned substrate. In this study, we investigated the pad conditioner lifetime while varying the crystal size of the deposited diamond film, which was controlled via different methane (CH4) gas concentrations in hydrogen gas (H2). Microcrystalline diamond (MCD) film was formed using 2% CH4 in H2 flow and nanocrystalline diamond film (NCD) was formed with 4% CH4. The NCD film showed a longer lifetime and higher adhesion with the substrate than the MCD film. Graphical
      PubDate: 2019-05-01
  • Synthesis of SrTiO 3 Fibers and Their Effects on the Thermoelectric
           Properties of La 0.1 Dy 0.1 Sr 0.75 TiO 3 Ceramics
    • Abstract: SrTiO3 fibers were fabricated by an in situ hydrothermal method using hydrated TiO2 fibers as both template and reactant. La0.1Dy0.1Sr0.75TiO3 powders containing x wt.% SrTiO3 fibers (x = 0, 1, 3, 5) were prepared by the sol–gel method and then sintered at 1450 °C under a reducing atmosphere (N2/H2 = 95/5). XRD analysis showed that the samples were mainly composed of SrTiO3 phase and a few Dy2Ti2O7 phase. TiO2 phase was detected in the samples with x = 3 and x = 5, and its peak intensity clearly reinforced with increasing x. With the addition of SrTiO3 fibers, the electrical conductivity increased significantly and the Seebeck coefficient kept almost unchanged, resulting in a high power factor of 1015 μW m−1 K−2 at 200 °C with a loading of 3 wt.% SrTiO3 fibers. Meanwhile, combined with low thermal conductivity, the sample with 3 wt.% SrTiO3 fibers showed the peak ZT value of 0.19 at 500 °C, which was 127% higher than that of La0.1Dy0.1Sr0.75TiO3. Graphical
      PubDate: 2019-05-01
  • High Energy Storage Properties and Electrical Field Stability of Energy
           Efficiency of (Pb 0.89 La 0.11 )(Zr 0.70 Ti 0.30 ) 0.9725 O 3 Relaxor
           Ferroelectric Ceramics
    • Abstract: In this study, electric energy storage properties of (Pb0.89La0.11)(Zr0.70Ti0.30)0.9725O3 (PLZT 11/70/30) relaxor ceramics were investigated. XRD pattern and SEM image confirms the perovskite phase and dense structure without any secondary phases and pores, respectively. Room temperature dielectric constant was found to be high (~ 3520) with low dielectric loss (~ 0.03). Dielectric constant changes with temperature confirm the relaxor ferroelectric behaviour of PLZT ceramics. Different parameters such as degree of deviation (ΔTm) from the Curie–Weiss law, the diffuseness of the phase transition (ΔTdiff) and degree of diffuseness (γ), which are related to the relaxor nature of ferroelectrics were calculated. With the remarkably slim polarization versus electric field hysteresis loops even at high applied electric field, high energy storage of 0.85 J/cm3 and very high energy storage efficiency of 92.9% were obtained from the PLZT ceramics. These values suggest that the PLZT 11/70/30 composition can be used for the pulse driving energy storage applications. Graphical
      PubDate: 2019-05-01
  • Finite Element Analysis for Reliability of Solder Joints Materials in the
           Embedded Package
    • Abstract: This paper is about study on warpage, creep strain and the total strain energy density (TSED) effect on fatigue life of the solder joints in the embedded package under thermal cycling conditions by finite element method. In order to investigate the influence of material of solder joints in embedded package, four materials (SAC305, SnAgCu, Sn96.5Ag3.5, Pb97.5Sn2.5) of solder joints were used. Calculated results show that warpage of package was low, creep strain and TSED of solder joints were low in embedded package. Therefore the fatigue life of the solder joint in embedded package increases. Also, the fatigue life of solder joints of Sn96.5Ag3.5 would be highest among solder materials because of the lowest of TSED. Graphical
      PubDate: 2019-05-01
  • Crystal Structure and XANES Study of Defect Perovskite (Y 1−x Pr x )
           1+δ Ba 2−δ Cu 3 O 7−y Compounds Prepared by Solid State Synthesis
    • Abstract: In this research, the processing and characterization of (Y1−xPrx)1+δBa2−δCu3O7−y cuprate perovskite powder were studied. The experimental powder samples of (Y1−xPrx)1+δBa2−δCu3O7−y (0 ≤ x ≤ 1) were prepared using a conventional solid-state reaction method. The starting powders in appropriate ratios were mixed with 6 mol% excess of A-site ions to reduce the amount of BaCuO2 and PrBaO3 second phases and calcined at 880 °C for 12 h in normal atmosphere. The calcined powders were investigated for phase content using X-ray diffraction technique and detailed structural parameters were obtained by Rietveld refinement. The microstructure of the powders was investigated by scanning electron microscopy (SEM). The chemical composition was carried out by energy dispersive X-ray analysis (EDS). The oxidation state and coordination of Pr and Cu were determined by X-ray absorption near edge structure (XANES) spectroscopy. It was found that high-purity (Y,Pr)BCO powders could be obtained. By the Rietveld refinement, the overall unit cell volume increased with increasing Pr content. SEM–EDS images showed that the particle size was about 1–5 μm and the elemental composition of (Y + Pr):Ba:Cu = 1:2:3. Pr and Cu XANES spectra indicated that the average formal valence was larger than 3 for Pr and 2 for Cu. However, the peak shifted to lower valence state at higher concentration of Pr. Graphical
      PubDate: 2019-05-01
  • Conformable, Thin, and Dry Electrode for Electrocardiography Using
           Composite of Silver Nanowires and Polyvinyl Butyral
    • Abstract: Development of a thin and dry electrode for electrocardiography (ECG) is essential in order to prevent skin irritation, allergic reactions from electrolytic gel, and motion artifacts caused by relative motion between the electrodes and the skin. In this study, we have developed a composite electrode made from Ag nanowires (AgNWs) and polyvinyl butyral (PVB), prepared by inverted layer processing (ILP). The initial composite electrodes were mechanically stable, flexible, and transparent; however, most of the NWs were located beneath the surface of the PVB such that few conductive pathways were exposed and available to contact the skin. In order to resolve this issue, prior to transferring the AgNWs from the temporary glass substrate to the PVB, we irradiated the NWs with intensive pulsed light. This irradiation induced plasmonic heating of the AgNWs, which caused the NWs to sink towards the glass and form a dense layer on the temporary substrate. Subsequent ILP resulted in the fabrication of an AgNWs/PVB composite electrode that demonstrated significant surface coverage of conductive pathways available for stable electrical contact with skin. The resultant composite electrode is an improved ECG electrode that exhibits fewer motion artifacts compared to conventional Ag/AgCl-based wet electrodes since it is both dry and conformable. Graphical
      PubDate: 2019-05-01
  • Effects of Different Atmosphere on Electrochemical Performance of Hard
           Carbon Electrode in Sodium Ion Battery
    • Abstract: Hard carbon is deemed to be a most promising anode materials for sodium—ion batteries (SIBs), while, the issues of low capacity and low initial coulombic efficiency still exist limiting the development of SIBs. Although high temperature carbonization of biomass materials under nitrogen or argon atmosphere is a common method for preparation of hard carbon, there are few reports about the effects of different protective atmospheres on propriety of hard carbon. In this article, hornet’s nest (HN) is used to prepare hard carbon under nitrogen and argon. At a suitable carbonization temperature (1200 °C and 1400 °C), the hard carbon under argon possesses lower specific surface area (25–50 cm−3 g−1), but higher initial coulomb efficiency (4–6%) and higher capacity retention (3–6%). Thus, it is inferred that high—performance hard carbon can be obtained under argon atmosphere. Our research about the effect of sintering atmosphere on material properties is expected to provide a reference for the synthetization of hard carbon by high temperature carbonization. Graphical
      PubDate: 2019-04-20
  • Study on Electrochemical Performance of Various Oxides-Coated LiNi 0.5 Mn
           1.5 O 4 Cathode for Lithium Ion Battery
    • Abstract: In this study, LiNi0.5Mn1.5O4 was prepared by solid-state synthesis method and MgCO3, Al2O3, SiO2, TiO2 were dry-coated on the surface of LiNi0.5Mn1.5O4. The structure and geometry of pure-LNMO and coated-LNMO were characterized by XRD, SEM, SEM–EDS. Dry coating method was applied and various coating materials were evaluated in terms of the stability study at room/high temperature and electrochemical property. The results of XRD and SEM–EDS demonstrated that MgCO3, Al2O3, SiO2, TiO2 were coated on the LiNi0.5Mn1.5O4 surface without any structural changes. Compared with pure-LNMO, the coated-LNMO shows significant decrease in side-reaction with electrolyte solution at the first cycle of the electrochemical test. In addition, coated-LNMO displays prominent thermal-stability at 25 °C and 55 °C and high c-rate, compared with pure-LNMO. Especially the coating layer of SiO2 inhibits the side-reaction with electrolyte solution induced by initial moisture formation. Therefore, the stability of capacity is significantly improved at the temperature of 55 °C and high c-rate, which are same results with those obtained by the electrochemical impedance spectroscopy results. This study has employed solid-state synthesis and dry coating method for the evaluation of various coated-LNMO materials and demonstrated the possibility to develop new high energy density electrode materials by surface modification. Graphical
      PubDate: 2019-04-10
  • Solution-Processed Hybrid Ambipolar Thin-Film Transistors Fabricated at
           Low Temperature
    • Abstract: We demonstrate solution-processed hybrid ambipolar thin-film transistors (TFTs) employing a stack structure composed of indium–gallium–zinc-oxide (IGZO) and single-wall carbon nanotube (SWCNT) as an active channel fabricated at low temperature. With an optimized deep-ultraviolet (DUV) photo annealing process for sol–gel based IGZO thin film on SWCNT random networks, the ambipolar transport of both electrons and holes with good electrical characteristics was realized. We also investigate the effect of DUV photo annealing on the material characteristics of solution-processed hybrid stack films and on the device performance of solution-processed hybrid ambipolar TFTs compared to those of samples thermally annealed at 500 °C, which is required for solution-processed high-quality IGZO thin films. The Raman spectra show that DUV photo annealing ensures hole transport in SWCNT random networks of a hybrid stack film, where the intensity of the 2D peak to the G peak was not changed compared to that of pristine SWCNT random networks. We believe that these analytical investigations reveal that DUV photo annealing is a promising method by which to realize hybrid ambipolar SWCNT/IGZO TFTs fabricated at low temperature. Graphical
      PubDate: 2019-04-09
  • Quantitative Analysis on Cellular Uptake of Clustered Ferrite Magnetic
    • Abstract: Due to their ability to be internalized into cells by endocytosis through cell membranes, the application of nanoparticles in therapeutic and diagnostic fields has received much interest. In particular, ferrite magnetic nanoparticles (MNPs) are widely used as reagents for medical care, including in vitro magnetic separation, T2-weighted magnetic resonance imaging, magnetic hyperthermia therapy, and as drug delivery systems. However, little is known about the quantitative analysis of the cellular uptake of MNPs by the interaction of particle surfaces with biomolecules. Here, we quantitatively analyze the intracellular uptakes of 30 nm Fe- and Mn-ferrite MNPs. We confirm that the magnetic properties of MNPs change according to their microstructure and quantitatively analyze nanoparticle internalization in breast cell lines (MCF10A, MCF7, and MDA-MB-231) by measuring the magnetic moment using a vibrating sample magnetometer. Finally, we examine the effect of nanoparticle microstructure on cellular uptake in terms of the interaction between the nanoparticles and biomolecules. Graphical
      PubDate: 2019-04-04
  • Synthesis and Characterization of Plasma-Polymer Gate Dielectric Films for
           Graphene Field Effect Transistor Devices
    • Abstract: In this study, a gate dielectric suitable for application in field effect transistors (FETs) was synthesized. Gate dielectrics were deposited using cyclohexane via plasma-enhanced chemical vapor deposition. These films were synthesized on silicon wafers substrates with plasma powers adjusted from 10 to 60 W. Graphene was synthesized on a nickel substrate by a thermal chemical vapor deposition process and coupled to the plasma-polymer via water transfer. Alpha step, Fourier-transform infrared spectroscopy, Raman spectroscopy, and atomic force microscopy findings in addition to water contact angle measurements were analyzed to characterize the physical and chemical properties of the plasma-polymer thin film. Furthermore, a probe station was used to characterize the FET devices fabricated using such films. Graphical
      PubDate: 2019-04-02
  • Shape Control Iron Pyrite Synthesized by Hot Injection Method: Counter
           Electrode for Efficient Dye-Sensitized Solar Cells
    • Abstract: The cubic and spherical shaped iron pyrite (FeS2) nanocrystals were synthesized in a pure phase form by an efficient hot injection method. These FeS2 nanocrystals were used as a counter electrode (CE) alternative to the conventional Pt CE in dye-sensitized solar cells (DSSCs) owing to its tremendous optical properties and low-cost. The obtained FeS2 nanocrystalline materials with excellent shape and phase purity were confirmed through XRD and Raman spectroscopy data. From Tafel, and impedance spectroscopy studies, the catalytic activity FeS2 CEs are found to be comparable with that of Pt CE. Along with the I3−/I− electrolyte, photo-conversion efficiency is found to be 6.9% (spherical), 6.2% (cubic) for the FeS2 CE, and 7% for Pt CE. The excellent performance of the FeS2 CE in DSSCs makes it a distinctive choice among the various CE materials studied including low-cost photovoltaics. Graphical
      PubDate: 2019-03-29
  • Copper–Nickel Alloy Plating to Improve the Contact Resistivity of Metal
           Grid on Silicon Heterojunction Solar Cells
    • Abstract: As a dominant metallization technique of crystalline silicon solar cells, screen printing with silver paste has been generally used in photovoltaic industries. In case of the silicon heterojunction solar cells (SHJ) structure, a metal contact with silver paste has lower electrical conductivity than pure silver due to the other compositions of the paste. For the reason, copper plating is attractive substitute for the silver paste since the plated-copper contacts have high conductivity and easily reduce line width which is beneficial to light absorption. In this experiment, we studied copper–nickel (Cu–Ni) alloy plating to form a seed layer of the copper plating on an indium tin oxide (ITO) layer which is used for the transparent conductive oxide of the SHJ solar cells. As a requirement of suitable seed layer, contact resistivity (ρc) between the seed and the ITO is important to obtain high fill factor by decreasing series resistance of solar cells. Contact resistivity values of the samples with varied nickel contents in the Cu–Ni films were extracted by using transfer length method. Also, the composition ratio of the alloy layer was analyzed by energy dispersive spectrometer. Moreover, X-ray diffraction was used to compare lattice parameter and crystallite size of the film. Graphical
      PubDate: 2019-03-29
  • Influence of the W Content on the Characteristics of Mo x W 1−x Si 2
           Heating Elements Fabricated by Self-Propagating High-Temperature Synthesis
    • Abstract: MoSi2-based composites are promising structural materials for high-temperature applications. MoxW1−xSi2 (x = 1, 0.9, 0.8, and 0.7) powders were successfully synthesized by self-propagating high-temperature synthesis. These powders were used to fabricate heating elements, which were then subjected to a post-annealing process to improve the structural quality. To determine the influence of the W content (0–30 mol%) on the characteristics of MoxW1−xSi2 composites, the surface morphologies, densities, and bending strengths of the MoxW1−xSi2 heating elements were investigated. Moreover, to validate the durability of the MoxW1−xSi2 heating elements, an accelerated degradation test (ADT) was conducted at temperatures up to 1700°C (heating rate = 5°C/min). The MoxW1−xSi2 heating element with 30 mol% of W exhibited a high density, a high bending strength, and superior durability after the ADT test. In contrast, the MoxW1−xSi2 heating element with 0 mol% of W showed inferior durability owing to the formation of bubbles at the MoxW1−xSi2 /SiO2 interface. Thus, the addition of W enhances the reliability and durability of MoxW1−xSi2 composites as heating elements. Graphical
      PubDate: 2019-03-28
  • Electrochemical Deposition of γ-MnO 2 on Ag/rGO Hybrid Films as Flexible
           Electrode Materials for Asymmetric Supercapacitor
    • Abstract: The flexible electrodes are the essential components for fabricating modern flexible supercapacitors. In this study, a composite hybrid film integrated with silver nanoparticles (Ag NPs), reduced graphene oxide (rGO) and γ-MnO2 nanorods as a flexible electrode has been developed by the electrochemical deposition method. The substrate (rGO) of the electrode not only provides mechanical stability but also ensures fast electron transfer during charge–discharge. The Ag NPs distributed in electrode provide the electronic channel to enhance the electric conductivity. The γ-MnO2 electroplated on the surface of hybrid films further improved the electrochemical performance of them. The resultant γ-MnO2/Ag/rGO hybrid films exhibit a high specific capacitance of 1090.3 F g−1 at current density of 0.3 A g−1. The asymmetric supercapacitor (ASC) devices were further fabricated by γ-MnO2/Ag/rGO films as anode and AC/rGO films as cathode electrodes within a wide operating voltage of 0–1.7 V. The energy density of obtained ASC devices was 71.8 Wh kg−1 at a power density of 279.4 W kg−1. Graphical
      PubDate: 2019-03-28
  • Thermoelectric Properties and Chemical Potential Tuning by K- and
           Se-Coalloying in (Pb 0.5 Sn 0.5 ) 1−x K x Te 0.95 Se 0.05
    • Abstract: Topological crystal insulator (TCI) and topological Dirac semimetals have topologically nontrivial surface and bulk state, respectively. The parent compound of Pb0.5Sn0.5Te exhibiting TCI band inversion has particle-hole symmetry owing to the gapless Dirac band implying a strong electron–hole bipolar compensation in Seebeck coefficient. We recently reported that weak perturbation of TCI state can enhance thermoelectric performance significantly due to highly dispersive and degenerated energy bands. It is a great interest that the further increase of chemical potential has beneficiary to thermoelectric performance in the vicinity of topological phase transition. Here we investigate the thermoelectric properties of the co-doping effect by K and Se in (Pb0.5Sn0.5)1−xKxTe0.95Se0.05 (x = 0.0, 0.005, 0.010, 0.015, 0.02) compounds. K-doping increases the band gap from 0.15 eV (Pb0.5Sn0.5Te) to 0.21 eV (x = 0.05) as well as increasing chemical potential resulting in the suppression of bipolar diffusion effect. In spite of the suppression of bipolar diffusion effect by K-doping, the power factor in K-doped compound is decreased significantly than the one of non-doped Pb0.5Sn0.5Te0.95Se0.05 compound. It indicates that when we increase chemical potential further on the breaking of topological band inversion, the thermoelectric performance is deteriorated because the chemical potential resides far from the linear band dispersions which become conventional material. The ZT for the K-doped (Pb0.5Sn0.5)1−xKxTe0.95Se0.05 is obtained as 0.91 at 750 K for x = 0.017 which is increased as much as 99% comparing to the pristine compound Pb0.5Sn0.5Te but it is reduced value (51.5%) comparing to those of Pb0.5Sn0.5Te0.95Se0.05 compound. We believe that this research is valuable on the confirmation that the weak perturbation of topological state and appropriate chemical potential tuning are important criteria in high thermoelectric performance. Graphical
      PubDate: 2019-03-27
  • Pd- and Au-Decorated MoS 2 Gas Sensors for Enhanced Selectivity
    • Abstract: To date, chemoresistive gas sensors based on metal oxide semiconductors (MOS) have been the most attractive sensor types for the practical application. However, with the emerging concept of Internet of Everything, high operating temperatures over 300 °C of the gas sensors based on MOS must be reduced to achieve low power consumption and overcome a limited battery capacity of mobile devices. The 2-dimensional materials like MoS2 have been, therefore, one of the most recently studied materials for gas sensors with capability of operation at significantly lower temperatures. However, lacking selectivity toward various target gas species limited their application to gas sensors. Herein, we investigated the effects of noble metals (Pd and Au) decoration on the gas sensing properties of MoS2 thin films. Due to the electronic sensitization of the noble metal catalysts and the formation of Pd hydride, overall gas responses and selectivity were significantly improved toward tests gas species. These results provide clear understandings on the effects of the surface noble metal catalysts on gas sensing properties of MoS2. Graphical abstract
      PubDate: 2019-03-18
  • Switching Behaviors of Ferroelectric and Relaxor Polymer Blend Films
    • Abstract: Ferroelectric polymer blend film with non-polar relaxor polymer shows composition dependency of switching behaviors. Studies of ferroelectric properties in polymer blend films with increase volume fraction of relaxor polymer revealed inversely decrease both remnant polarization and coercive voltage, simultaneously. The reduced coercive voltage of the blend with films with higher volume fraction of realxor polymer relative to that of pure ferroelectric film is consistent with the high frequency of applied voltage. Nanoscale ferroelectric polarization switching of blend film was also faster than that of pure ferroelectric film. Graphical
      PubDate: 2019-03-13
  • A High Performance Solar-Blind Detector Based on Mixed–Phase Zn 0.45 Mg
           0.55 O Alloy Nanowires Network
    • Abstract: The mixed-phase Zn0.45Mg0.55O alloy nanowires network was firstly synthesized on SiO2/Si substrate by chemical vapor deposition method. The metal–semiconductor–metal structured Zn0.45Mg0.55O nanowires solar-blind photodetector with a sharp absorption peak of wavelength 245 nm was fabricated, which exhibited an ultra-low dark current (0.2 nA), a high on–off ratio (2.85 × 103), a large peak responsivity (0.48 A/W) at 6 V bias, and a high external quantum efficiency (234.2%). This excellent performance is comparable with other ZnMgO thin film UV photodetectors. Moreover, the detection mechanism of this photodetector is explained by the modifications in energy band diagrams of different nanojunctions among Zn0.45Mg0.55O nanowires and heterojunction interfaces between wurtzite and cubic structured ZnMgO in mixed-phase Zn0.45Mg0.55O nanowire. It is found that nanojunctions and heterojunction interfaces could be responsible for a low dark current and high responsivity of this device based on mixed-phase Zn0.45Mg0.55O nanowire materials. This work reveals that the distinctive advantages of mixed-phase ZnMgO nanowires network for ultraviolet optoelectronic detection applications. Graphical
      PubDate: 2019-03-05
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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