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  Subjects -> ELECTRONICS (Total: 187 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 7)
Advances in Electronics     Open Access   (Followers: 90)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 38)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 337)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 26)
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: 14)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 30)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 20)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 38)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 13)
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: 9)
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: 295)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access  
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 117)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 97)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 100)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 55)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access   (Followers: 1)
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: 207)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 99)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 80)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 49)
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: 72)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 71)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 58)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 42)
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: 78)
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 Energy Systems Integration     Open Access  
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 55)
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: 70)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 35)
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: 11)
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: 3)
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: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
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: 25)
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: 11)
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: 32)
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: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
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: 175)
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: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
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: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 27)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 41)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 9)
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: 2)
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: 56)
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: 78)
Solid State Electronics Letters     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
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)
Transactions on Electrical and Electronic Materials     Hybrid Journal  
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Ural Radio Engineering Journal     Open Access  
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  [2373 journals]
  • Optimization of Transistor Characteristics and Charge Transport in
           Solution Processed ZnO Thin Films Grown from Zinc Neodecanoate
    • Abstract: Solution processing of metal oxide-based semiconductors is an attractive route for low-cost fabrication of thin films devices. ZnO thin films were synthesized from one-step spin coating-pyrolysis technique using zinc neodecanoate precursor. X-ray diffraction (XRD), UV–visible optical transmission spectrometry and photoluminescence spectroscopy suggested conversion to polycrystalline ZnO phase for decomposition temperatures higher than 400 °C. A 15 % precursor concentration was found to produce optimal TFT performance on annealing at 500 °C, due to generation of sufficient charge percolation pathways. The device performance was found to improve upon increasing the annealing temperature and the optimal saturation mobility of 0.1 cm2 V−1 s−1 with ION/IOFF ratio ~ 107 was achieved at 700 °C annealing temperature. The analysis of experimental results based on theoretical models to understand charge transport envisaged that the grain boundary depletion region is major source of deep level traps and their effective removal at increased annealing temperature leads to evolution of transistor performance. Graphic Single-step spin coating-pyrolysis synthesis of ZnO thin films from non-aqueous precursor zinc neodecanoate has been investigated for transistor applications.
      PubDate: 2019-10-09
  • Effects of Urea as an Additive in Fe 2 O 3 Thin-Film Photoelectrodes
    • Abstract: In this study, an Fe2O3 photoelectrode was grown on a fluorine-doped tin oxide substrate via microwave chemical bath deposition. We added various amounts of urea as an additive to the FeCl3 precursor for the fabrication of the Fe2O3 photoelectrode and investigated the effects of the concentration of the urea additive on the morphological, optical, structural, electrical, and photoelectrochemical properties of this photoelectrode. Among the different concentrations evaluated, the maximum photocurrent density (0.51 mA/cm2 at 0.6 V vs. SCE) was obtained using 0.05 M urea, as the resulting electrode had the greatest thickness, highest flat-band potential, and preferential growth along the (110) plane along with favorable electron transport characteristics. The maximum photocurrent density of the sample prepared with 0.05 M urea was approximately 60% greater than that obtained from the sample prepared in the absence of urea. This study showed that the photoelectrochemical properties of the Fe2O3 photoelectrode were substantially influenced by the changes in the morphological, optical, structural, and electrical properties caused by the addition of urea. Graphic
      PubDate: 2019-10-04
  • A Novel Transparent Microwave Thin Film Coating Technique Applied to
           Dual-Band Antennas
    • Abstract: In this paper, we propose a novel transparent microwave thin film coating technique and discuss its application in planar dual-band antennas (0.9/5.55 GHz). We developed a new process for activating the nano-alignment thin film from high to low resistivity (from 1.96 to 1.29 × 10−4 Ω cm) and from partial to full transparency (from 55 to 83% transmittance) within 150 s. The platform of the activation process comprises a periodic electrode, an optical microscope, and an alternating current signal generator. The periodic electrode can effectively rearrange the nano-alignment thin film into an ordered arrangement, which enhances the properties of the thin film in the microwave frequency range. A high-transparency and low-resistivity dual-band antenna is designed and fabricated using the proposed microwave thin film coating technique. The dual-band antenna has operating bandwidths of 740–960 and 5030–7030 MHz and potential applications in transparent electronics such as wearable devices and intelligent cars. Graphic
      PubDate: 2019-10-01
  • Single-Walled Carbon Nanotube-Based Chemi-Capacitive Sensor for Hexane and
    • Abstract: Two configurations of single-walled carbon nanotube-based chemi-capacitive gas sensors were fabricated, i.e., horizontal and vertical. Further, their sensing properties for hexane and ammonia (NH3) vapor were characterized and compared with chemi-resistive-type sensing properties. Upon exposure to hexane and NH3 vapor, both capacitance and resistance varied as the analyte concentration increased. The sensing sensitivity measured along the horizontal direction increased with the device resistance. However, the capacitive sensing response along the vertical direction was independent of the number and fraction of semi-conductive single-walled carbon nanotubes. Furthermore, the vertical chemi-capacitive sensing response was dependent on the dipole moment of analytes. Graphic
      PubDate: 2019-09-28
  • Effect of Sn-Decorated MWCNTs on the Mechanical Reliability of
           Sn–58Bi Solder
    • Abstract: The mechanical reliability of Sn–MWCNT composite solder containing various content of Sn-decorated MWCNTs (0, 0.05, 0.1, and 0.2 wt%) and Sn–58Bi solder were investigated. The Sn-decorated MWCNTs nanoparticles were used to improve the mechanical reliability of Sn–58Bi solder, which is a representative, low-temperature, lead-free solder. The Sn-decorated MWCNT nanoparticles were synthesized using the polyol method, and the Sn–MWCNT composite solder paste was fabricated by mechanical mixing. The shear and bending tests were conducted to evaluate the mechanical properties of the solder joints. We identified the microstructure of solder to investigate the intermetallic compound and failure mechanism of Sn–MWCNT composite solder. Furthermore, a high-temperature storage test at 100 °C for 1000 h was performed to determine long-term reliability. The shear strength and fracture energy increased about 21% and 23%, respectively, with 0.1 wt% Sn-decorated MWCNTs. In addition, the bending reliability of Sn–58Bi solder increased approximately 25%. Graphic
      PubDate: 2019-09-25
  • Effect of Thermoelectric Leg Thickness in a Planar Thin Film TEC Device on
           Different Substrates
    • Abstract: Recently, mobile application processors (APs) have suffered from thermal issues such as local hot spot generation. Several approaches for chip cooling, such as dynamic thermal management, and heat pipe cooling, have been attempted so far, but, these solutions cannot completely eliminate increasing thermal issues. Therefore, in this study, we fabricated a planar type of thin film thermoelectric cooler (TEC) as an active cooling device for a mobile AP chip. We studied the effect of thickness on a planar thin film TEC device related to Joule heating and demonstrated the Peltier cooling effect on polyimide (PI) and Si substrates. The optimal thicknesses of n-type Bi2Te3 and p-type Sb2Te3 films were evaluated by ANSYS® simulation, and are 5.05 μm and 5.45 μm, respectively. It was shown that heat moves to the TE leg on the PI substrate, while the Si substrate serves as a heat sink according to the IR thermography analysis. The optimal thickness of the TE showed a temperature difference between the cold junction and hot junction up to 1.3 °C. Graphical
      PubDate: 2019-09-25
  • Shelf Life Study of NiO Nanowire Sensors for NO 2 Detection
    • Abstract: In this letter, conductometric sensing devices based on VLS grown NiO nanowires were presented for the detection of low concentrations of NO2. Moreover, the shelf life of sensing devices stored in ambient environmental conditions was tested over a period of 6 months. The VLS grown NiO nanowires were uniform in nature, covering completely the substrate surface area, with diameters ranging from 10 to 50 nm. The sensing devices show excellent performances, such as good stability, high response, outstanding selectivity toward NO2 and low detection limit. The devices were tested toward different analytes such as H2, acetone, NO2, etc. Indeed, at optimal working temperature, they show highly selective behavior towards NO2. Finally, the shelf life study reports that, due the exposure to the atmosphere, NiO nanowires exhibit a decrease in their conductivity, which enhances the response of the sensor. Graphic
      PubDate: 2019-09-25
  • Synthesis of Ag@rGO/g-C 3 N 4 Layered Structures and Their Application to
           Toxic Gas Sensors: Effect of Ag Nanoparticles
    • Abstract: In this work, graphitic carbon nitride (g-C3N4) was synthesized by simple pyrolysis of melamine, and it was hybridized with reduced graphene oxide (rGO) and silver nanoparticles (AgNPs) using a stepwise solution method. AgNPs were randomly distributed on the surface of rGO/g-C3N4 layered hybrid structure, forming Ag@rGO/g-C3N4 composite. It was disclosed that the Ag@rGO/g-C3N4 composite responded to both oxidizing and reducing gases at room temperature, and its response was greatly enhanced from those of pristine rGO and rGO/g-C3N4. The room temperature responses of the composite were estimated at − 95% and 8% for 50 ppm of NO2 and NH3, respectively. The roles of structural components were discussed, and a gas-sensing mechanism was proposed based on the respective roles. In particular, AgNPs turned out to play an important role in the gas-sensing activity. Graphic
      PubDate: 2019-09-20
  • Properties of CoS 2 /CNT as a Cathode Material of Rechargeable
           Aluminum-Ion Batteries
    • Abstract: Aluminum ion batteries (AIBs) are considered, in principle, promising post-lithium-ion batteries, which are potential for using in grid-scale energy storage and electric vehicles, owing to the economic Al. The inflammable ionic liquid electrolyte endows stable plating and stripping of Al ions. A spotlighted research on cathode material has been preforming to obtain a high-performance cathode material that can match well with the prominent Al foil. However, one over-looked factor for the study of cathode materials is the cost and possibility of mass-production. With this key point in mind, we as the forerunner studied the CoS2/carbon nanotubes (CNTs) composite cathode material composed of low cost and commercialized CoS2 and multi-wall CNTs to promote the development of AIBs. Stable charge/discharge plateaus (at 1.2/0.9 V vs. AlCl4−/Al) during cycling test were obtained for the CoS2/CNTs product at a high current density of 1000 mA g−1, with an extremely high Coulombic efficiency of 98% and reasonable electrochemical capacities. This report is expected to contribute more contribution in the development of cathode materials for rechargeable AIBs. Graphic
      PubDate: 2019-09-20
  • S@GO as a High-Performance Cathode Material for Rechargeable Aluminum-Ion
    • Abstract: Aluminum-ion batteries (AIBs) are considered promising post lithium-ion batteries owing to their outstanding safety, gravimetric and volumetric capacities, and cost efficiency advantages. However, one practical obstacle to their development is the lack of reliable cathode materials that can be coupled with the distinguished Al anode. To address this issue, we synthesized a S@GO composite material for use as a cathode material in AIBs. The synthesized S@GO material exhibits a rod structure with a diameter of around 100 nm. Inside these nanorods, sulfur nanoparticles with a size of around 5 nm were uniformly anchored on the graphene sheets. By taking the advantage of an introduction of graphene sheets, the capacities were significantly preserved, displaying a capacity that was more than double that of a bare S active material. In addition, a 3000-cycle long-term repeated charge/discharge measurement exhibited extremely stable capacity values with a high Coulombic efficiency of 98% at the 3000th cycle. The charge/discharge processes were clearly shown during the repeated cycling measurement at a high current density of 1000 mA g−1. This work is expected to stimulate further study of elemental S used as a cathode material for high-performance AIBs. Graphic
      PubDate: 2019-09-17
  • Electrical Effect of High-Field Induced Diffusive Metal in the Ceramic
           Film Deposited by the Aerosol Deposition Method
    • Abstract: The electrical behavior of the high-field induced diffusive metal (HFIDM) is demonstrated in ceramic–metal composite film deposited by aerosol deposition (AD) method. To verify the effect of HFIDM, electrical properties for non-composite and metal-composite films are analyzed. The obtained results clearly demonstrate that HFIDM in composite film strongly affected its electrical properties such as current level, conduction mechanism, breakdown field, and resistance. These changes are attributed to the displacement and migration of HFIDM under electric field, leading to the noticeable variations in its electrical properties. These findings can provide a strong roadmap for AD-based applications using ceramic-HFIDM composite film. Graphic
      PubDate: 2019-09-17
  • Preparation of Monodisperse Silica Nanoparticles via Controlling the
           Interphase of Two-Phase Synthesis for Optical Anticounterfeiting Materials
    • Abstract: Monodisperse silica particles were fabricated by seed synthesis and growth using two-phase synthesis methods and additional growth methods based on the Stöber process. The particle size and monodispersity of the silica particles were investigated by changing the reaction time and reactant concentration during seed growth. At the beginning of seed growth, small and large particles were present at the same time; however, the size became more uniform as the reaction proceeded. When the stirring conditions were constant, the size of the silica particles was constant, despite variations in the reactant concentration. Relatively simple methods of manufacturing photonic crystal films via the self-assembly of monodisperse silica particles in a regular lattice were demonstrated. Using photocurable colloidal suspensions, practical methods are presented to produce colloidal photonic crystals with high optical transparency and physical stiffness. Graphic
      PubDate: 2019-09-06
  • 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: 2019-09-01
  • Effect of Structural Control on the Magnetoelectric Characteristics of
           Piezoelectric–Magnetostrictive Laminate Composite in Resonance and
           Off-Resonance Modes
    • Abstract: In this study, it is reported that the magnetoelectric (ME) performance in the resonance mode and that in the off-resonance mode are reversed depending on the thickness fraction of the piezoelectric layer in a ME laminate composite composed of piezoelectric and magnetostrictive layers. The ME performance in the resonance mode increased as the thickness fraction of the piezoelectric layer was increased, while the ME performance in the off-resonance mode decreased. Based on the impedance spectrum analysis of fabricated ME laminate samples, it was confirmed that the thickness fraction of the piezoelectric layer had a significant influence on the mechanical loss of the device. The phase angle change and the mechanical quality factor at the anti-resonance frequency of the ME laminate were found to be useful for predicting the ME performance in the resonance mode. High aspect ratio of the laminate was favorable in both resonance and off-resonance modes. Graphical
      PubDate: 2019-09-01
  • 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: 2019-09-01
  • 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: 2019-09-01
  • Deposition Behavior of Boron-Doped Diamond with Varying Amount of Acetone
           by Hot Filament Chemical Vapor Deposition
    • Abstract: As a carbon source for hot filament chemical vapor deposition of boron-doped diamond (BDD), cost-effective acetone (C3H6O) was used instead of commonly used methane gas. In this case, tantalum filaments turned out to be more suitable than tungsten filaments because tantalum is more oxidation-resistant and can be heated to much higher temperature without evaporation than tungsten. As the acetone flux was varied, the hydrogen flux was also varied so that the mixture of acetone and hydrogen fluxes was fixed at 500 standard cubic centimeter per minute (sccm). Trimethyl borate (TMB) was used as a boron source. As the acetone flux was varied, the TMB flux was also varied so that the boron doping of 11,400 ppm was maintained. As the flux of acetone was increased from 90 to 170 sccm, the grain size and the film thickness of BDD increased. In this range of acetone fluxes, the films showed well-defined (111) facets, indicating that the high quality diamond was deposited. When the acetone flux was increased to 210 sccm, the grain size decreased abruptly and the film thickness, which represents the deposition rate, decreased also. When the acetone flux was increased to 250 sccm, the grain size further decreased, producing a cauliflower structure and the film thickness further decreased. The potential window, which is measured as electrochemical properties of BDD, increased as the acetone flux increased from 90 to 170 sccm and did not change much between 170 and 250 sccm. From this experiment, it was confirmed that varying the flux of acetone could control the morphology, the growth rate and the electrochemical properties of the BDD film. Graphical
      PubDate: 2019-09-01
  • Recent Progress in Inorganic Hole Transport Materials for Efficient and
           Stable Perovskite Solar Cells
    • Abstract: Organic–inorganic hybrid perovskite solar cells (PSCs) are considered as one of the most promising emerging photovoltaics with outstanding performance. However, the commonly used organic hole transport materials (HTMs) suffer from heat-, light-, and bias-induced degradation along with defect diffusion and hygroscopic properties. To resolve these issues in conventional HTMs, inorganic materials with superior chemical stability, high carrier mobility, and low cost have been developed, demonstrating improved stability under rigorous conditions such as high temperature and long-term illumination. Understanding the properties of alternative inorganic HTMs is of prominent importance to realize more stable and efficient PSCs. This review summarizes the recent progresses in inorganic HTMs adopted in various device architectures, with their remarkable achievements in efficiency and long-term stability. Graphic
      PubDate: 2019-07-09
  • Stable Interconnect System for Horizontal Thermoelectric Coolers by
           Thermodynamic-Based Prediction
    • Abstract: We studied the improvement of interfacial stability and contact resistance by applying Cu with high electrical conductivity but high diffusivity to thin film type thermoelectric devices. Since the thin film device has a large surface to volume ratio, it is necessary to minimize the contact resistance occurring at the interface in order to minimize heat generation due to resistance. For the reliability of such a device, long duration phase stability is required, especially when using Cu electrodes with high diffusivity. The interconnect system, including Cu and the barrier materials, was selected based on a phase diagram with a thermodynamic-based calculation. The interlayer was required to improve the unstable interface to prevent the reaction of Cu and Bi2Te3. Ta and Mo, which are low diffusivity materials, were selected as candidates. Thermodynamic calculation results showed that Ta has a stable interface with Bi2Te3, while Mo reacts with Te. The calculation was confirmed by experiments, and it was determined that the longer the annealing process, the higher the contact resistance is when the Mo interlayer is applied, which is in accordance with the thermodynamic calculation. The thermodynamic calculations are a useful methodology when selecting materials with a stable interface with highly reactive chalcogenide materials. Graphical
      PubDate: 2019-07-09
  • High-Performance Amorphous Silicon Thin Film Solar Cells Prepared at
           100 °C: Toward Flexible Building-Integrated Photovoltaics
    • Abstract: For low-cost and lightweight polymer/plastic substrates in flexible building-integrated photovoltaic (BIPV) modules, low-temperature processing is essential. Amorphous silicon (a-Si:H) requires processing at a temperature of 200–250 °C by plasma-enhanced chemical vapor deposition to obtain satisfactory optoelectronic properties, which limits such substrates in terms of thermal budget. This study is focused on the fabrication of p–i–n-type a-Si:H solar cells at relatively low temperatures (100 °C). Intrinsic a-Si:H films with large optical gaps (1.83 eV) were prepared at 100 °C using a high hydrogen dilution ratio. In addition, p-type amorphous silicon oxide and n-type microcrystalline silicon oxide films with large optical gaps and suitable conductivities were prepared at 100 °C using a gas mixture containing the dopant B2H6 or PH3 and CO2. Finally, an a-Si:H p–i–n cell was fabricated at 100 °C; it exhibited an excellent power conversion efficiency of 9.0%, which was higher than those reported for a-Si:H thin film photovoltaics prepared at 100 °C. We believe that this study will open promising routes for the development of high-performance and flexible BIPVs. Graphic
      PubDate: 2019-07-04
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
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