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  Subjects -> ELECTRONICS (Total: 184 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: 6)
Advances in Electronics     Open Access   (Followers: 79)
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: 318)
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: 267)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 106)
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: 93)
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: 195)
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: 67)
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: 20)
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: 70)
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: 25)
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: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 11)
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 Hybrid Intelligence     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: 25)
Journal of Electrical Bioimpedance     Open Access  
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   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 169)
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: 29)
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 ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
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: 19)
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)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 54)
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  [2351 journals]
  • Impedance Matching Techniques of Multi-layered PZT Ceramics for
           Piezoelectric Energy Harvesters
    • Abstract: In this research, the possibility of passive damping system based on the piezoelectric energy harvesting has been proposed and tested. To apply passive damper system, piezoelectric ceramics were stacked, and impedance was matched. Piezoelectric energy harvesters were employed due to their excellent piezoelectric and robust properties. Especially, multilayered (Pb,Zr)TiO3 piezoelectric ceramic have high piezoelectric charge coefficient d33 and piezoelectric voltage coefficient g33 for actuator and harvester applications, respectively. Multilayered (Pb,Zr)TiO3 piezoelectric ceramics can generate comparatively high current level compared with single layered piezoelectric ceramics due to its parallel connected capacitors. In energy harvester applications, multilayered (Pb,Zr)TiO3 piezoelectric ceramics have a role of voltage source with capacitive impedance. Due to considerable impedance in voltage sources, the role of impedance matching between the source and output terminal is more critical. By employing the piezoelectric energy harvesting system for the passive damper, output energy of 11 μJ/cm3 was obtained at the 100 μF capacitors. Therefore, impedance matching technologies were intensively investigated to obtain maximum output energy for storing capacitors. Graphical
      PubDate: 2019-07-01
       
  • 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: 2019-07-01
       
  • The Improved Performance of Molybdenum Disulphide Thin-Film Transistors
           Operating at Low Voltages by Solution-Processed Fluorocarbon Encapsulation
           
    • Abstract: We demonstrate a simple and reproducible method of solution-processed fluorocarbon encapsulation which significantly improves the device performance of molybdenum disulphide (MoS2) thin-film transistors (TFTs) operating at low voltages. Using such encapsulation, the key factors of the device, such as field-effect mobility, sub-threshold swing and device-to-device uniformity were improved. This achievement is presumed to stem from the screening effect of fluorocarbon, poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) which possesses a chemical structure with polarizable interactions of carbon–fluorine (C–F) bonds in the end groups, on the scattering of charge impurities in MoS2 TFTs. We also investigate the Raman spectra to verify the effects of solution-processed fluorocarbon encapsulation on the structure of MoS2 thin films where the decreases in the intensity levels of E2g and A1g were observed without a shift in the peak. We believe that such a screening method can be a promising approach to recover the intrinsic electrical characteristics of MoS2 TFTs for nano-electronics with low power consumption. Graphical
      PubDate: 2019-07-01
       
  • Parametric Optical Property Database for CdSe 1−x S x Alloys
    • Abstract: A comprehensive database of the optical response in the form of complex dielectric function (ε) spectra of magnetron co-sputtered CdSe1−xSx alloy thin films is developed spanning the full 0 ≤ x ≤ 1 range of compositions. A parametric model is presented and used to determine ε describing each film while in both as-deposited and thermally annealed states. This model combines a critical point electronic transition lineshape and an Urbach tail in the above- and below-bandgap portions of the measured spectrum, respectively, while maintaining first derivative continuity. Additionally, this hybrid parametric description of ε automatically determines the Urbach energy (EU) describing the width of the sub-bandgap absorption tail, thereby providing a relative measure of the defect density of the modeled material. These as-deposited CdSe1−xSx films are generally found to be the most defective at intermediate compositions with some EU reaching energies > 200 meV. Annealing reduces EU in all films to a relatively uniform value < 100 meV for all compositions. Leveraging the full ε database in modeling CdS-CdSe bi-layer stacks is demonstrated to be effective in detecting the composition gradients resulting from inter-diffusion upon annealing. The accuracy of this technique is verified through excellent agreement with cross sectional energy dispersive X-ray spectroscopy measurements. Graphical
      PubDate: 2019-07-01
       
  • 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: 2019-07-01
       
  • Fe 3 O 4 –ZnO Core–Shell Nanoparticles Fabricated by Ultra-Thin Atomic
           Layer Deposition Technique as a Drug Delivery Vehicle
    • Abstract: Fe3O4–ZnO nanoparticles with core–shell structures were successfully fabricated by an atomic layer deposition method. The core–shell NPs consisted of superparamagnetic Fe3O4 cores of 100 nm average size and conformal ZnO shells of 10 nm thickness. The NPs showed a saturation magnetization of ~ 23 emu/g, which is suitable for magnetic delivery of the particles. Cytotoxicity testing revealed that the Fe3O4–ZnO NPs have high cell viability (over 90%) after 24 h culture. Also, they exhibited a high ibuprofen-loading capacity (640 μg per mg of the particles) and good release ability (> 90% after 72 h in simulated body fluid). As a result, the Fe3O4–ZnO nanoparticles with conformal ultra-thin ZnO shell layers are anticipated as promising drug delivery vehicles with acceptable cell viability and high drug loading-release abilities. Graphical
      PubDate: 2019-07-01
       
  • Preparation of Li 7 P 2 S 8 I Solid Electrolyte and Its Application in
           All-Solid-State Lithium-Ion Batteries with Graphite Anode
    • Abstract: A Li7P2S8I solid electrolyte was prepared by the reaction between raw materials in an ethyl propionate medium and drying of the precursor. The obtained sample was characterized by X-ray diffraction (XRD), cyclic voltammetry, DC polarization test and AC impedance measurements. The formation of Li7P2S8I was confirmed from the results of XRD. Cyclic voltammetry and the DC polarization test indicated that the obtained Li7P2S8I was stable at low potential versus Li/Li+ and against Li metal. The all-solid-state lithium-ion battery was fabricated by using Li–In, Li7P2S8I solid electrolyte and a graphite composite that was prepared by mixing graphite, Li7P2S8I solid electrolyte and vapor grown carbon fiber with a vortex mixer. It was observed that the electrode materials were homogeneously mixed from the scanning electron microscopy image of the composite prepared by using the vortex mixer. The fabricated half-cell was characterized by the charge–discharge test. The Li7P2S8I solid electrolyte is suitable for use with a graphite anode because the charge–discharge test exhibited an initial discharge capacity of 372 mA h g−1 and high reversibility of capacity. Graphical
      PubDate: 2019-07-01
       
  • Amorphous V 2 O 5 Positive Electrode Materials by Precipitation Method in
           Magnesium Rechargeable Batteries
    • Abstract: Amorphous vanadium pentoxide (a-V2O5) was prepared via the precipitation method, for use as a positive-electrode material in magnesium rechargeable batteries (MRBs). Amorphous metal oxides can be good candidates as the host materials for the Mg divalent ion because of many vacancies and huge void spaces. Furthermore, amorphous metal oxides generally do not experience a phase change during cycles. The electrochemical characteristics of the a-V2O5 and c-V2O5 (crystalline vanadium pentoxide) were evaluated and compared. Both a-V2O5 and c-V2O5 can store over 150 mAh/g of the Li+ ion in activated carbon (AC)/V2O5 cells, however, Mg2+ ion cannot be stored in both a-V2O5 and c-V2O5 in the first cycle. But, the specific capacity of a-V2O5 gradually increases up to 180 mAh/g after the 10th cycle, whereas c-V2O5 cannot react continuously. Therefore, the a-V2O5, which has a large specific capacity and high reaction voltage, can be a good candidate as a host material for MRBs because its amorphous structure has the advantage of the multi-valent ion storage. Graphical
      PubDate: 2019-07-01
       
  • 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: 2019-07-01
       
  • 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: 2019-07-01
       
  • Mn Doped PbZrTiO 3 Thick Films for the Renewable Piezoelectric Energy
           Harvesters for Mobile Communications
    • Abstract: Renewable energy systems including piezoelectric, thermoelectric, and photovoltaic devices have been intensively considered for the for the internet of things. Small energy sources with sustainable and robust properties for sensors, actuators, and communications were indispensable for the next industrial revolution. In this research, Mn doped PbZrTiO3 thick films piezoelectric renewable energy harvesters were prepared and employed for the sustainable energy sources for the energy harvesters. Nano sized powders were prepared by the high energy ball milling process. Calcination and sintering processes were sequentially processed for the device applications. Generated output energies were measured and tested by the impedance matching circuits and applied to the energy sources. Graphical
      PubDate: 2019-07-01
       
  • Quantitative Analysis on Cellular Uptake of Clustered Ferrite Magnetic
           Nanoparticles
    • 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: 2019-07-01
       
  • A Hybrid Energy Storage Mechanism of Zinc Hexacyanocobaltate-Based
           Metal–Organic Framework Endowing Stationary and High-Performance
           Lithium-Ion Storage
    • Abstract: Lithium-ion batteries (LIBs) are considered to be theoretically promising with regard to large-scale energy storage and conversion systems. However, a significant problem is the lack of cost-efficient high-performance cathode materials for LIBs. In this study, we demonstrate a Prussian blue analog, zinc hexacyanocobaltate (ZnHCCo), as the low-cost and high-performance cathode material for LIBs. The open-framework crystal structure of ZnHCCo contributes toward reversible cation insertion and extraction along with the spontaneous valence change of hosts. Specifically, the as-prepared ZnHCCo exhibits a highly reversible capacity of 121.5 mAh g−1 at a current density of 1.25 C, a superior rate capability of 60.5 mAh g−1 at 6.25 C, and a stable cycling stability with a Coulombic efficiency of 96.5%. Therefore, the well-crystallized and low-cost ZnHCCo is expected to be a potential cathode material for LIBs used in grid-scale energy storage and conversion systems. In addition, the synthesis process of the electrode material can be readily up scaled using the earth abundant and environmentally benign precursors via a room-temperature wet-chemical method. Graphical
      PubDate: 2019-07-01
       
  • Correction to: Synthesis and Characterization of Plasma-Polymer Gate
           Dielectric Films for Graphene Field Effect Transistor Devices
    • Abstract: The original version of this article unfortunately contains a mistake. Two numbers in the acknowledgement section are incorrect. The correct acknowledgements are as follows:
      PubDate: 2019-06-12
       
  • Printed Water-Based ITO Nanoparticle via Electrohydrodynamic (EHD) Jet
           Printing and Its Application of ZnO Transistors
    • Abstract: An electrohydrodynamic jet (EHD) printing process was optimized for the patterning of an indium tin oxide (ITO) nanoparticles ink by manipulating its surface tension through the addition of a nonionic surfactant, Triton X-100 (TX-100). As a result, a stable cone-jet mode was performed, which could provide printed drops with the smallest diameter and printing fidelity among EHD jet printing modes, and lead to a line width ranging from 230 µm to 30 µm in addition to well-define patterns with various shapes for ITO transparent conducting electrodes (TCEs). The multi-printing technique and subsequent thermal annealing for printed ITO TCEs allows improvement in its electrical conductivity. In addition, the evolution of the chemical composition and crystalline structure of the printed ITO TCE according to the annealing temperature was investigated to determine the optimal conditions to utilize printed ITO nanoparticles for ZnO-based thin-film transistors. Graphic
      PubDate: 2019-06-11
       
  • Effects of Ageing on the Microwave Surface Resistance of MgB 2
           Superconductor Films Stored in Low Vacuum
    • Abstract: Nb is a very popular material in superconductive electronic devices such as superconducting single-photon detectors and radio-frequency (RF) cavities for particle accelerators. Before MgB2 can be used as a substitute material, the stability of its properties over time must be confirmed. We studied how ageing over a period of 514 weeks affected the microwave surface resistance (RS) and the normal-state resistivity (ρ) of epitaxially-grown MgB2 films. MgB2 films with thicknesses of 1.0 μm and 1.7 μm were prepared using the hybrid physical CVD method, and exhibited a critical temperature (TC) of 39 K. They were stored in low-vacuum to prevent reactions with humidity, except when the films were taken out of storage for measurement purposes. Variation in RS with the ageing period appeared to be significant at very low temperatures. The RS values of 1.0 μm-thick and 1.7 μm-thick MgB2 films increased by ~ 8 times and ~ 3 times, respectively, over ~ 10 years. The aged MgB2 films appeared to have reduced π-band gap energy values. The pristine MgB2 films value of 2.3 meV was reduced to 1.3–1.7 meV over ~ 10 years. The TC of the MgB2 films remained almost the same regardless of the ageing time. The enhanced RS and ρ in the aged MgB2 films were attributed to increased intraband scattering within the π-band and the σ-band. Graphical
      PubDate: 2019-06-10
       
  • Formation Mechanism of Novel Sidewall Intermetallic Compounds in Micron
           Level Sn/Ni/Cu Bumps
    • Abstract: A new kind of intermetallic compounds (IMC) were found around copper pillar in micron level bumps. To investigate the formation mechanism, three different sized Sn/Ni/Cu bumps (10 μm, 20 μm, 50 μm) were electroplated then reflowed at 230 °C for 100 s. After reflow process, a thin layer of IMC was formed around copper pillar, which is attributed to surface wetting behavior. After aging at 170 °C and 200 °C for different times, the growth mechanism of sidewall IMC was observed by scanning electron microscopy combined with electron backscatter diffraction (EBSD) technology. Surface diffusion was considered to be the main driving force for sidewall IMC growth for the activation energy of them was found to be much smaller than that in previous studies. The EBSD results showed a preferred orientation of sidewall Cu3Sn grains <100> being perpendicular to copper periphery, which indicated direction of Cu atoms flux during Cu3Sn growth. Formation mechanism of this novel sidewall IMC was proposed based on surface wetting and surface diffusion. The findings contribute to the failure mechanism study in small size bumps and provide insights into the reliability of 3D electronic packaging. Graphic
      PubDate: 2019-06-07
       
  • Titanium(III) Sulfide Nanoparticles Coated with Multicomponent Oxide
           (Ti–S–O) as a Conductive Polysulfide Scavenger for Lithium–Sulfur
           Batteries
    • Abstract: In spite of the high specific capacity and energy density of Li–S batteries based on low-cost sulfur as the active material, their practical use has not yet been realized due to the undesirable formation of soluble polysulfides (PS) during electrochemical cycles and their shuttling effect. In order to minimize this serious issue caused by the active material dissolution, transition metal compounds such as oxides, nitrides, and sulfides have alternatively been used to capture the PS and also to provide electron pathways in the S electrode. However, high-performance additive materials having both high affinity to PS and high electronic conductivity have not been developed thus far. Herein, we report the preparation and application of a new additive material—titanium(III) sulfide (Ti2S3) nanoparticles covered with multicomponent (Ti–S–O) oxide (MO–Ti2S3), which can be synthesized on a large scale using an inductively-coupled thermal plasma synthesis method followed by a simple surface oxidation treatment. MO–Ti2S3 shows much higher PS affinity than other titanium compounds and electronic conductivity that is comparable to that of carbon black. Furthermore, MO–Ti2S3 shows much higher resistance to heat and oxidation while having charge–discharge stability when compared with TiS2. Finally, we show that the cyclability and specific capacity of the Li–S battery can be significantly enhanced by incorporating MO–Ti2S3 in the cathode when compared to utilizing C species. Graphical
      PubDate: 2019-05-27
       
  • The Effect of Pulse Electrodeposition of Bismuth on Electrochemical
           Reduction of Carbon Dioxide to Formate
    • Abstract: Efficient electrochemical reduction of CO2 to formate is demonstrated by fabricating Bi nanoflake with pulse electrodeposition. The effect of pulse voltage on morphology of the Bi nanoflake and electrochemical property was investigated. The pulse voltage of 80 mVAg/AgCl with six pulse cycles successfully produces ultrathin Bi nanoflakes. The finite-element-based simulation shows that the two-dimensional geometry with large lateral dimensions and ultrathin thickness can localize a strong electric field at the corner site of the flakes, resulting in facilitating efficient reduction of CO2 to formate. As a result, formate Faradaic efficiency of the Bi nanoflakes showed over 90% at − 0.8 VRHE. Also, the formate production rate reached 69 µmol/cm2/h at − 0.8 VRHE. The pulse electrodeposition provides highly dense and uniform and tailored nanostructures in the large area without the requirements of high vacuum or high temperatures process. Graphical
      PubDate: 2019-05-08
       
  • Facile Fabrication of MCo 2 S 4 (M = Mn, Ni) Nanotube Arrays for
           High-Performance Supercapacitors
    • Abstract: MCo2S4(M = Mn, Ni) nanomaterials are attracting considerable attention because of their unique nanostructure, good redox properties, excellent theoretical capacitance, low cost and easy preparation. Herein, MCo2S4(M = Mn, Ni) nanotube arrays have been fabricated by a one-pot hydrothermal method and could be used as conductive additive and binder-free electrodes for supercapacitors. The results show that the specific capacitance of MCo2S4(M = Mn or Ni) nanotube arrays could reach as high as 2667 and 1623 F/g at the current density of 10 A/g, respectively, indicating high rate performance. Furthermore, the MnCo2S4 nanotube arrays exhibited excellent cycling stability (68% of initial specific capacitance after 1800 cycles). These excellent electrochemical properties benefit from the synergistic effects of unique tubular microstructure and high conductivity of the samples. Graphical Schematic illustration of formation of MCo2S4(M = Mn, Ni)
      PubDate: 2019-05-08
       
 
 
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