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  Subjects -> ENERGY (Total: 298 journals)
    - ELECTRICAL ENERGY (2 journals)
    - ENERGY (180 journals)
    - ENERGY: GENERAL (8 journals)
    - NUCLEAR ENERGY (27 journals)
    - PETROLEUM AND GAS (52 journals)
    - RENEWABLE ENERGY (29 journals)

ENERGY (180 journals)                 | Last

Showing 1 - 200 of 406 Journals sorted alphabetically
ActaEnergetica     Open Access  
Advances in Building Energy Research     Hybrid Journal   (Followers: 9)
Advances in Energy and Power     Open Access   (Followers: 4)
Advances in High Energy Physics     Open Access   (Followers: 14)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 11)
American Journal of Energy Research     Open Access   (Followers: 8)
Annals of Nuclear Energy     Hybrid Journal   (Followers: 6)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 2)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 10)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Solar Energy     Hybrid Journal   (Followers: 14)
Archives of Thermodynamics     Open Access   (Followers: 4)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bulletin of Energy Economics and Technology     Open Access   (Followers: 2)
Atomic Energy     Hybrid Journal   (Followers: 4)
Atoms for Peace: an International Journal     Hybrid Journal   (Followers: 4)
Batteries     Open Access   (Followers: 3)
Biofuel Research Journal     Open Access   (Followers: 3)
Biofuels     Hybrid Journal   (Followers: 10)
Biofuels Engineering     Open Access  
Biomass Conversion and Biorefinery     Partially Free   (Followers: 9)
Bulletin de droit nucleaire     Full-text available via subscription   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 30)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 17)
Carbon Management     Hybrid Journal   (Followers: 6)
Catalysis for Sustainable Energy     Open Access   (Followers: 5)
CERN courier. International journal of high energy physics     Free   (Followers: 5)
Chain Reaction     Full-text available via subscription   (Followers: 1)
Clefs CEA     Full-text available via subscription   (Followers: 1)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 4)
Dams and Reservoirs     Hybrid Journal   (Followers: 3)
Development of Energy Science     Open Access   (Followers: 4)
Distributed Generation & Alternative Energy Journal     Hybrid Journal   (Followers: 3)
E3S Web of Conferences     Open Access  
Economics and Policy of Energy and the Environment     Full-text available via subscription   (Followers: 6)
Electrical and Power Engineering Frontier     Open Access   (Followers: 18)
Electricity Journal     Partially Free   (Followers: 1)
ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations     Open Access  
Energy     Partially Free   (Followers: 22)
Energy & Fuels     Full-text available via subscription   (Followers: 22)
Energy and Buildings     Hybrid Journal   (Followers: 7)
Energy and Emission Control Technologies     Open Access   (Followers: 3)
Energy and Environment Focus     Free   (Followers: 5)
Energy and Environment Research     Open Access   (Followers: 11)
Energy and Environmental Engineering     Open Access   (Followers: 6)
Energy and Power     Open Access   (Followers: 8)
Energy and Power Engineering     Open Access   (Followers: 15)
Energy Conversion and Management     Hybrid Journal   (Followers: 7)
Energy Efficiency     Hybrid Journal   (Followers: 11)
Energy Harvesting and Systems : Materials, Mechanisms, Circuits and Storage     Hybrid Journal   (Followers: 2)
Energy Law Journal     Full-text available via subscription   (Followers: 4)
Energy Materials : Materials Science and Engineering for Energy Systems     Hybrid Journal   (Followers: 17)
Energy Policy     Partially Free   (Followers: 56)
Energy Prices and Taxes     Full-text available via subscription   (Followers: 5)
Energy Procedia     Open Access   (Followers: 2)
Energy Reports     Open Access   (Followers: 3)
Energy Research & Social Science     Full-text available via subscription   (Followers: 1)
Energy Science & Engineering     Open Access   (Followers: 3)
Energy Science and Technology     Open Access   (Followers: 13)
Energy Strategy Reviews     Partially Free   (Followers: 9)
Energy Studies Review     Open Access   (Followers: 5)
Energy Systems     Hybrid Journal   (Followers: 12)
Energy Technology     Partially Free   (Followers: 4)
Energy Technology & Policy     Open Access   (Followers: 1)
Energy, Sustainability and Society     Open Access   (Followers: 17)
Environmental Progress & Sustainable Energy     Hybrid Journal   (Followers: 6)
EPJ Photovoltaics     Open Access   (Followers: 3)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Renewable Energy     Full-text available via subscription   (Followers: 1)
Frontiers in Energy     Hybrid Journal   (Followers: 3)
Frontiers in Energy Research     Open Access   (Followers: 2)
Fuel and Energy Abstracts     Full-text available via subscription   (Followers: 4)
Functional Materials Letters     Hybrid Journal   (Followers: 1)
Gcb Bioenergy     Open Access   (Followers: 2)
Geothermal Energy     Open Access   (Followers: 3)
Green     Hybrid Journal   (Followers: 2)
Green Energy & Environment     Open Access   (Followers: 1)
IEA Electricity Information     Full-text available via subscription   (Followers: 2)
IEA Natural Gas Information     Full-text available via subscription   (Followers: 2)
IEEE Power and Energy     Full-text available via subscription   (Followers: 22)
IEEE Transactions on Energy Conversion     Hybrid Journal   (Followers: 9)
IEEE Transactions on Nuclear Science     Hybrid Journal   (Followers: 7)
IEEE Transactions on Power Systems     Hybrid Journal   (Followers: 19)
IET Power Electronics     Hybrid Journal   (Followers: 19)
Ingeniería Energética     Open Access  
Innovations : Technology, Governance, Globalization     Hybrid Journal   (Followers: 5)
International Journal of Alternative Propulsion     Hybrid Journal   (Followers: 4)
International Journal of Ambient Energy     Hybrid Journal   (Followers: 1)
International Journal of Applied Power Engineering     Open Access   (Followers: 4)
International Journal of Clean Coal and Energy     Open Access   (Followers: 5)
International Journal of Coal Science & Technology     Open Access   (Followers: 1)
International Journal of Electric and Hybrid Vehicles     Hybrid Journal   (Followers: 8)
International Journal of Emerging Electric Power Systems     Hybrid Journal   (Followers: 4)
International Journal of Emerging Multidisciplinary Fluid Sciences     Full-text available via subscription   (Followers: 1)
International Journal of Energy and Environmental Engineering     Open Access   (Followers: 4)
International Journal of Energy and Power     Open Access   (Followers: 8)
International Journal of Energy and Statistics     Hybrid Journal  
International Journal of Energy Engineering     Open Access   (Followers: 9)
International Journal of Energy Research     Hybrid Journal   (Followers: 8)
International Journal of Energy Science     Open Access   (Followers: 1)
International Journal of Flow Control     Full-text available via subscription   (Followers: 4)
International Journal of Global Energy Issues     Hybrid Journal   (Followers: 7)
International Journal of Green Energy     Hybrid Journal   (Followers: 9)
International Journal of Hydrogen Energy     Partially Free   (Followers: 12)
International Journal of Marine Energy     Full-text available via subscription   (Followers: 1)
International Journal of Nuclear Desalination     Hybrid Journal  
International Journal of Nuclear Energy Science and Technology     Hybrid Journal   (Followers: 2)
International Journal of Nuclear Governance, Economy and Ecology     Hybrid Journal   (Followers: 1)
International Journal of Nuclear Hydrogen Production and Applications     Hybrid Journal   (Followers: 1)
International Journal of Nuclear Knowledge Management     Hybrid Journal   (Followers: 1)
International Journal of Power and Energy Conversion     Hybrid Journal   (Followers: 2)
International Journal of Smart Grid and Green Communications     Hybrid Journal  
International Journal of Sustainable Energy     Hybrid Journal   (Followers: 12)
International Journal of Sustainable Energy Planning and Management     Open Access   (Followers: 2)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 7)
International Journal of Thermodynamics     Open Access   (Followers: 7)
Journal of Alternate Energy Sources & Technologies     Full-text available via subscription  
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 5)
Journal of China Coal Society     Open Access  
Journal of Energy     Open Access  
Journal of Energy & Natural Resources Law     Hybrid Journal   (Followers: 1)
Journal of Energy in Southern Africa     Open Access   (Followers: 2)
Journal of Energy Technologies and Policy     Open Access   (Followers: 5)
Journal of Energy, Environment & Carbon Credits     Full-text available via subscription   (Followers: 2)
Journal of Fusion Energy     Hybrid Journal   (Followers: 3)
Journal of International Energy Policy     Open Access   (Followers: 3)
Journal of Modern Power Systems and Clean Energy     Open Access   (Followers: 7)
Journal of Nano Energy and Power Research     Full-text available via subscription   (Followers: 4)
Journal of Nuclear Energy Science & Power Generation Technology     Hybrid Journal  
Journal of Ocean Engineering and Marine Energy     Hybrid Journal   (Followers: 1)
Journal of Physical Chemistry C     Full-text available via subscription   (Followers: 27)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 6)
Journal of Radiological Protection     Full-text available via subscription   (Followers: 4)
Journal of Renewable Energy     Open Access   (Followers: 3)
Journal of Semiconductors     Full-text available via subscription   (Followers: 2)
Journal of Solar Energy     Open Access   (Followers: 7)
Journal of Solar Energy Engineering     Full-text available via subscription   (Followers: 16)
Journal of Sustainable Bioenergy Systems     Full-text available via subscription   (Followers: 1)
Journal of Sustainable Energy Engineering     Full-text available via subscription  
Journal of Technology Innovations in Renewable Energy     Hybrid Journal  
Materials for Renewable and Sustainable Energy     Open Access   (Followers: 7)
MRS Energy & Sustainability - A Review Journal     Full-text available via subscription  
Natural Resources     Open Access   (Followers: 2)
Nature Energy     Hybrid Journal   (Followers: 3)
Nigerian Journal of Technological Research     Full-text available via subscription  
Nuclear Data Sheets     Full-text available via subscription  
Nuclear Engineering and Design     Hybrid Journal   (Followers: 10)
Nuclear Law Bulletin     Full-text available via subscription   (Followers: 2)
Nuclear Materials and Energy     Open Access   (Followers: 1)
Oil and Gas Journal     Full-text available via subscription   (Followers: 10)
Oil, Gas, Coal and Electricity - Quarterly Statistics - Electricite, charbon, gaz et petrole - Statistiques trimestrielles     Full-text available via subscription   (Followers: 8)
Open Journal of Energy Efficiency     Open Access   (Followers: 2)
Power Technology and Engineering     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Energy     Hybrid Journal   (Followers: 3)
Progress in Nuclear Energy     Hybrid Journal  
Radiochimica Acta     Hybrid Journal   (Followers: 5)
Radioprotection     Hybrid Journal   (Followers: 1)
Science and Technology of Nuclear Installations     Open Access   (Followers: 1)
Smart Grid and Renewable Energy     Open Access   (Followers: 8)
Solar Energy     Hybrid Journal   (Followers: 18)
Solar Energy Materials and Solar Cells     Hybrid Journal   (Followers: 27)
SourceOCDE Energie nucleaire     Full-text available via subscription  
SourceOECD Nuclear Energy     Full-text available via subscription   (Followers: 1)
South Pacific Journal of Natural and Applied Sciences     Hybrid Journal  
Strategic Planning for Energy and the Environment     Hybrid Journal   (Followers: 4)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 6)
Surface Science Reports     Full-text available via subscription   (Followers: 15)
Sustainable Energy     Open Access  
Sustainable Energy Technologies and Assessments     Full-text available via subscription  
Sustainable Energy, Grids and Networks     Hybrid Journal  
Technology Audit and Production Reserves     Open Access  
The International Journal of Ocean and Climate Systems     Full-text available via subscription   (Followers: 6)
The Journal of Computational Multiphase Flows     Full-text available via subscription  
Universal Journal of Applied Science     Open Access   (Followers: 2)
Washington and Lee Journal of Energy, Climate, and the Environment     Open Access   (Followers: 3)
Waste Management     Hybrid Journal   (Followers: 10)
Water International     Hybrid Journal   (Followers: 10)
Wiley Interdisciplinary Reviews : Energy and Environment     Hybrid Journal   (Followers: 4)
Wind Energy     Hybrid Journal   (Followers: 2)
Wind Engineering     Full-text available via subscription   (Followers: 2)
Wireless Power Transfer     Full-text available via subscription   (Followers: 2)

       | Last

Journal Cover Functional Materials Letters
  [SJR: 0.528]   [H-I: 14]   [1 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1793-6047 - ISSN (Online) 1793-7213
   Published by World Scientific Homepage  [118 journals]
  • Nitrogen-doped carbon coated silicon derived from a facile strategy with
           enhanced performance for lithium storage
    • Authors: Lingxing Zeng, Renpin Liu, Heyuan Qiu, Xi Chen, Xiaoxia Huang, Peixun Xiong, Qingrong Qian, Qinghua Chen, Mingdeng Wei
      Abstract: Functional Materials Letters, Ahead of Print.
      Silicon-based nanostructures are receiving intense interest in lithium-ion batteries (LIBs) because they have ultrahigh lithium ion storage ability. However, the fast capacity fading induced by the considerably tremendous volume changes of Si anode during the Li-ion intercalation processes as well as the low intrinsic electric conductivity have hindered its deployment. Herein, we initially developed an effective technique to synthesize the core-shell Si/nitrogen-doped carbon (Si/N[math]C), composite by combining in situ interfacial polymerization and decorate with melamine, followed by carbonization. When used as anode material for LIBs, the Si/N[math]C composite delivered a notable reversible capacity (1084 mAh g[math] at 0.2 A g[math] for 50 cycles) and high rate capability (495 mAh g[math] at 1 A g[math]).
      Citation: Functional Materials Letters
      PubDate: 2016-06-27T03:32:15Z
      DOI: 10.1142/S1793604716500557
       
  • Light enhanced resistive switching in BaTiO3/CoFeB/BaTiO3 structure
    • Authors: Hongwei Li, Bai Sun, Lujun Wei, Jianhong Wu, Xiangjiang Jia, Wenxi Zhao, Peng Chen
      Abstract: Functional Materials Letters, Ahead of Print.
      Obvious resistive switching is observed under light irradiation in BaTiO3/CoFeB/BaTiO3 trilayer prepared by magnetron sputtering system while the same sample shows extremely small resistive switching effect in the dark. Under the irradiation of 31.4[math]mW/cm2, the ratio of high resistance to low resistance (OFF/ON ratio) of the sample annealed at 600[math]C can keep about 80 in more than 70 test cycles without obvious decay. The current conduction mechanism is PF emission in LRS and space charge limited conduction (SCLC) in HRS. The origin of the resistive switching behavior can be explained by considering the trapping and detrapping of charges.
      Citation: Functional Materials Letters
      PubDate: 2016-06-24T07:18:52Z
      DOI: 10.1142/S1793604716500521
       
  • Synthesis of ceramic-based porous gradient structures for applications in
           energy conversion and related fields
    • Authors: Thomas Graule, Paulina Ozog, Caroline Durif, Judit Wilkens-Heinecke, Dariusz Kata
      Abstract: Functional Materials Letters, Ahead of Print.
      Porous, graded ceramic structures are of high relevance in the field of energy conversion as well as in catalysis, and additionally in filtration technology and in biomedical applications. Among different technologies for the tailored design for such structures we demonstrate here a new environmental friendly UV curing-based concept to prepare laminated structures with pore sizes ranging from a few microns up to 50 microns in diameter and with porosities ranging from 10% up to 75 vol.% porosity.
      Citation: Functional Materials Letters
      PubDate: 2016-06-16T07:27:07Z
      DOI: 10.1142/S1793604716410010
       
  • Positive magnetoresistance of La[math]Sr[math]MnO3/C composites
    • Authors: Yu. V. Kabirov, V. G. Gavrilyachenko, A. S. Bogatin
      Abstract: Functional Materials Letters, Ahead of Print.
      The perovskite manganite La[math]Sr[math]MnO3 compound is used as a component in ceramic ([math](La[math]Sr[math]MnO[math]-xC composites at [math]–0.85. It is found that every studied specimen is characterized by the linear dependence of the positive magnetoresistance (PMR) on the magnetic field strength at room temperature. The 0.6(La[math]Sr[math]MnO[math]-0.4C composite has the largest magnetoresistance value (15%) at room temperature and intensity of magnetic field [math][math]kOe. A possible mechanism for the PMR of ([math](La[math]Sr[math]MnO[math]-xC composites is discussed.
      Citation: Functional Materials Letters
      PubDate: 2016-06-14T07:11:16Z
      DOI: 10.1142/S1793604716500545
       
  • Excess lithium storage in LiFePO4-Carbon interface by ball-milling
    • Authors: Hua Guo, Xiaohe Song, Jiaxin Zheng, Feng Pan
      Abstract: Functional Materials Letters, Ahead of Print.
      As one of the most popular cathode materials for high power lithium ion batteries (LIBs) of the electrical-vehicle (EV), lithium iron phosphate (LiFePO4 (LFP)) is limited to its relatively lower theoretical specific capacity of 170[math]mAh g[math]. To break the limits and further improve the capacity of LFP is promising but challenging. In this study, the ball-milling method is applied to the mixture of LFP and carbon, and the effective capacity larger than the theoretical one by 30[math]mAh g[math] is achieved. It is demonstrated that ball-milling leads to the LFP-Carbon interface to store the excess Li-ions.
      Citation: Functional Materials Letters
      PubDate: 2016-06-14T07:11:07Z
      DOI: 10.1142/S1793604716500533
       
  • Impact of crystal structure singularity on transport and electrochemical
           properties of Lix(LiyFezV[math])O2 — electrode material for
           lithium batteries
    • Abstract: Functional Materials Letters, Ahead of Print.
      Lithium vanadium oxide (LiVO2) and its substituted derivatives are a distinctive group of materials that may act both, as cathode and anode materials for Li-ion batteries. This paper presents influence of crystal structure singularity of Li(LiyFezV[math])O2 ([math], 0.03, 0.07, [math], 0.05, 0.1) on transport and electrochemical properties of the compounds.
      Citation: Functional Materials Letters
      PubDate: 2016-06-14T07:11:05Z
      DOI: 10.1142/S179360471641006X
       
  • Enhancement of electrochemical performance of LiFePO4 nanoparticles by
           direct nanocoating with conductive carbon layers
    • Abstract: Functional Materials Letters, Ahead of Print.
      The results of simple and environmental-friendly method of the carbon nanocoatings on low-conductive cathode material have been shown in this work. The carbon nanocoatings were prepared during wet impregnation process of precursor derived from hydrophilic polymer based on poly([math]-vinylformamide) modified by pyromellitic acid. The crystal structures and morphology of all composites were characterized by X-ray powder diffraction (XRD), low temperature nitrogen adsorption/desorption measurements (N2-BET) and transmission electronic microscopy (TEM). The electrical properties of the obtained composites were examined by EC studies. The electrochemical performance was carried out in galvanostatic mode with stable charge–discharge current and performed in Li/Li[math]/(CCL/LiFePO[math] type cells. The process of formation CCL/LiFePO4 nanocomposite significantly enhances the electrical conductivity of the material and improves its capacity retention and electrochemical performance.
      Citation: Functional Materials Letters
      PubDate: 2016-06-14T07:11:03Z
      DOI: 10.1142/S1793604716410071
       
  • Recent developments of film bulk acoustic resonators
    • Authors: Junning Gao, Guorong Liu, Jie Li, Guoqiang Li
      Abstract: Functional Materials Letters, Ahead of Print.
      Film bulk acoustic wave resonator (FBAR) experienced skyrocketing development in the past 15 years, owing to the explosive development of mobile communication. It stands out in acoustic filters mainly because of high quality factor, which enables low insertion loss and sharp roll off. Except for the massive application in wireless communication, FBARs are also promising sensors because of the high sensitivity and readily integration ability to miniaturize circuits. On the ground of summarizing FBAR’s application in wireless communication as filters and in sensors including electronic nose, bio field, and pressure sensing, this paper review the main challenges of each application faced. The number of filters installed in the mobile phone has being grown explosively, which leads to overcrowded bands and put harsh requirements on component size and power consumption control for each unit. Data flow and rate are becoming increasingly demanding as well. This paper discusses three promising technical strategies addressing these issues. Among which coupled resonator filter is given intense attention because it is able to vigorously reduce the filter size by stacking two or more resonators together, and it is a great technique to increase data flow and rate. Temperature compensation methods are discussed considering their vital influence on frequency stability. Finally, materials improvement and novel materials exploration for band width modulation, tunable band acquisition, and quality factor improvement are discussed. The authors appeal attention of the academic society to bring AlN epitaxial thin film into the FBAR fabrication and have proposed a configuration to implement this idea.
      Citation: Functional Materials Letters
      PubDate: 2016-06-01T02:58:15Z
      DOI: 10.1142/S1793604716300024
       
  • Pre- and post-oxidation treatment of titanium as a method of improving the
           response of TiO2-based photoanodes in PECs
    • Authors: Anita Trenczek-Zajac, Joanna Banas
      Abstract: Functional Materials Letters, Ahead of Print.
      TiO2-based photoanodes were prepared via thermal oxidation of titanium foils in air at 500–900[math]C. Some of them were pre-treated via etching with HCl prior to oxidation, and others post-treated by means of sensitization with Ag2S or CdS. XRD analysis revealed that the formation of rutile is observed even at 500[math]C. Etching prior to oxidation removes the Ti passivation layer and facilitates the oxidation process, and lowers the temperature at which the fundamental absorption edge is observed. The highest photocurrent values measured in a photoelectrochemical cell (PEC) were obtained for anodes etched prior to oxidation. Sensitization with CdS or Ag2S increased photocurrent drastically. It was demonstrated that pre- and post-treated TiO2-based photoanodes prepared in the process of thermal oxidation offer far better performance in PECs than those which had not been treated.
      Citation: Functional Materials Letters
      PubDate: 2016-05-30T12:06:32Z
      DOI: 10.1142/S1793604716410046
       
  • Structural properties and presence of protons in
           Ba[math]Gd[math]Zr[math]SnxInyO[math] perovskites
    • Abstract: Functional Materials Letters, Ahead of Print.
      In this work, structural characterization of selected perovskite-type compounds from Ba[math]Gd[math]Zr[math]SnxInyO[math] group is given, including high temperature XRD measurements. An evidence of water incorporation into the crystal structure of the materials in a form of OH[math] is discussed on a basis of thermogravimetric studies, with mass spectroscopy analysis of the gases released from samples on heating/cooling. As expected, oxygen non-stoichiometry was found to play a dominant role concerning possibility of water uptake. In addition, a rather strong affinity of the materials towards CO2 was documented, which seems to be a problem concerning possible application of the compounds as proton conducting solid electrolytes.
      Citation: Functional Materials Letters
      PubDate: 2016-05-30T12:06:32Z
      DOI: 10.1142/S1793604716410058
       
  • Graphite-specific peptide mediated synthesis of Pt nanoparticles on
           reduced graphene oxide for electrochemical detection of H2O2
    • Authors: Li Wang, Yantao Sun, Xiangxin Xue, Yujing Sun, Zhuang Li
      Abstract: Functional Materials Letters, Ahead of Print.
      We demonstrate here a facile and effective strategy to prepare reduced graphene oxide-platinum nanoparticle (RGO-PtNP) nanohybrids by the mediation of graphite-specific peptide (GSP). For the first time, we found that GSP can be used to modify RGO non-covalently in one way, and in another way promote the formation of PtNPs on RGO as a biomolecular bridge. The created RGO-PtNP nanohybrids show enhanced electrocatalytic activity toward H2O2 and can be utilized to fabricate non-enzymatic electrochemical H2O2 sensor.
      Citation: Functional Materials Letters
      PubDate: 2016-05-27T04:14:51Z
      DOI: 10.1142/S179360471650051X
       
  • Preliminary study of structural changes in Li2MnSiO4 cathode material
           during electrochemical reaction
    • Abstract: Functional Materials Letters, Ahead of Print.
      In this paper, we present exsitu observations of a structure of particular Li2MnSiO4 grains at different states of charge (SOC). The goal of these studies is structural analysis of Li2MnSiO4 cathode material for Li-ion batteries at different stages of electrochemical reaction using transmission electron microscopy. Performed analysis suggests that amorphization process of Li2MnSiO4 is not directly connected with lithium ions deintercalation but with additional electrochemical reactions running in the working cell.
      Citation: Functional Materials Letters
      PubDate: 2016-05-17T03:11:18Z
      DOI: 10.1142/S1793604716410034
       
  • A- and B-site doping effect on physicochemical properties of
           Sr[math]BaxMMoO6 (M[math] Mg, Mn, Fe) double perovskites —
           candidate anode materials for SOFCs
    • Abstract: Functional Materials Letters, Ahead of Print.
      In this work, we evaluate the physicochemical properties of Sr[math]BaxMMoO6 (M [math] Mg, Mn, Fe) double perovskites as alternative anode materials for solid oxide fuel cells, for which the effect of substitution of strontium by barium in a full range of compositions is studied. The crystal structure, microstructure, characterization of transport properties (electrical conductivity, Seebeck coefficient) and oxygen content as a function of temperature, as well as chemical stability in oxidizing and reducing conditions are discussed. Fe- and Mo-containing Sr[math]BaxFeMoO6 oxides show very high total conductivities with values of 100–1000 S[math][math]cm[math], while Sr[math]BaxMgMoO6 present good redox stability.
      Citation: Functional Materials Letters
      PubDate: 2016-05-17T03:11:18Z
      DOI: 10.1142/S1793604716410022
       
  • One-step electrolytic preparation of Si–Fe alloys as anodes for
           lithium ion batteries
    • Authors: Hailong Wang, Diankun Sun, Qiqi Song, Wenqi Xie, Xu Jiang, Bo Zhang
      Abstract: Functional Materials Letters, Ahead of Print.
      One-step electrolytic formation of uniform crystalline Si–Fe alloy particles was successfully demonstrated in direct electro-reduction of solid mixed oxides of SiO2 and Fe2O3 in molten CaCl2 at 900[math]C. Upon constant voltage electrolysis of solid mixed oxides at 2.8[math]V between solid oxide cathode and graphite anode for 5[math]h, electrolytic Si–Fe with the same Si/Fe stoichimetry of the precursory oxides was generated. The firstly generated Fe could function as depolarizers to enhance reduction rate of SiO2, resulting in the enhanced reduction kinetics to the electrolysis of individual SiO2. When evaluated as anode for lithium ion batteries, the prepared SiFe electrode showed a reversible lithium storage capacity as high as 470[math]mAh g[math] after 100 cycles at 200[math]mA g[math], promising application in high-performance lithium ion batteries.
      Citation: Functional Materials Letters
      PubDate: 2016-05-06T09:08:33Z
      DOI: 10.1142/S1793604716500508
       
  • Synthesis and luminescence properties of
           (Lu[math]Ce[math])2Ca[math]Mg2Si3O[math] silicate garnet phosphors and its
           applications
    • Authors: Wei Xia, Xiyan Zhang, Liping Lu
      Abstract: Functional Materials Letters, Ahead of Print.
      Silicate garnet phosphors (Lu[math]Ce[math]Ca[math]Mg2Si3O[math] with [math], 0.05, 0.1, and 0.15 were prepared by high-temperature solid-state reaction in a reducing atmosphere. The crystal structure, photoluminescence and luminescence of the phosphors were investigated. The optimum excitation peak wavelength of the phosphors ranged from 450[math]nm to 490[math]nm, matching the emission spectra of a blue light-emitting diode chip. The phosphors emit orange-red light after excitation that can be tuned from 589[math]nm to 597[math]nm by changing the concentration of calcium ions. In addition, their emission made them suitable for use in warm-white LEDs with a high-color rendering index.
      Citation: Functional Materials Letters
      PubDate: 2016-05-06T09:08:32Z
      DOI: 10.1142/S1793604716500491
       
  • Synthesis and conduction mechanism of high proton conductor
           H6SiW[math]V2O[math]4H2O
    • Authors: Huaxue Cai, Tianpei Huang, Qingyin Wu, Wenfu Yan
      Abstract: Functional Materials Letters, Ahead of Print.
      A ternary heteropoly acid (HPA) H6SiW[math]V2O[math]14H2O was prepared and investigated in this paper. The structure feature and hydration of this HPA was characterized by IR, XRD, UV, and TG-DTA. This HPA exhibits a high proton conductivity, which is [math]S[math]cm[math] at 25[math]C and 70% relative humidity. It is a novel high proton conductor. The conductivity increases with higher temperature, and it exhibits Arrhenius behavior, with the activation energy value of 21.02[math]kJ[math] mol[math] for proton conduction, indicating the proton conduction mechanism is dominated by vehicle mechanism.
      Citation: Functional Materials Letters
      PubDate: 2016-05-03T09:26:37Z
      DOI: 10.1142/S179360471650048X
       
  • Orientation modulated charge transport in hematite for
           photoelectrochemical water splitting
    • Authors: Jiajia Cai, Yinglei Liu, Song Li, Meiqi Gao, Dunwei Wang, Gaowu Qin
      Abstract: Functional Materials Letters, Ahead of Print.
      Hematite is currently considered one of the most promising photoanode materials for light-driven water splitting. The photoelectrochemical performance of hematite is limited by its low conductivity. In this work, we demonstrate that the conductivity of hematite films can be tuned by controlling the orientation of hematite crystals. By applying a high magnetic field (up to 10 T) during the drop-casting preparation, hematite films composed of single crystal particles show featured texture by promoting those particles alignment with (001) normal to the substrate. By enhancing the photocurrent densities with tuned hematite orientation, the current method provides an effective way for increasing the number of carriers that can reach the surface.
      Citation: Functional Materials Letters
      PubDate: 2016-04-26T08:15:18Z
      DOI: 10.1142/S1793604716500478
       
  • Photovoltaic lithium-ion battery fabricated by molecular precursor method
    • Authors: Hiroki Nagai, Tatsuya Suzuki, Yoshihisa Takahashi, Mitsunobu Sato
      Abstract: Functional Materials Letters, Ahead of Print.
      A novel thin-film lithium-ion battery (LIB) which can be charged by the light irradiation was fabricated by molecular precursor method. The unprecedented, translucent thin-film LIB, fabricated on a fluorine-doped tin oxide pre-coated glass substrate, was attained by using the active materials, titania for anode and LiCoO2 for cathode, respectively. The averaged potential at 2.04[math]V was observed by applying a constant current of 0.2[math]mA. Then, that at 1.82[math]V was detected after 60[math]s during the sequential self-discharge process. The charging voltage of the assembled battery was 1.38[math]V with irradiation of 1-sun, the self-discharge voltage was 1.37[math]V. Based on the calibration curve of the charging voltages over constant currents ranging from 0–1.0[math]mA, the detected value can be theoretically reduced to the charging operation by applying a constant current of approximately 60[math][math]A. The charge and discharge of this device was stable voltage at least 30 cycles. The two-in-one device can simultaneously generate and store electricity from solar light, the renewable energy source, and may be applied in smart windows for distributed power system according to on-site demand.
      Citation: Functional Materials Letters
      PubDate: 2016-04-26T08:15:18Z
      DOI: 10.1142/S1793604716500466
       
  • Facile synthesis of water-soluble graphene-based composite: Non-covalently
           functionalized with chitosan-ionic liquid conjugation
    • Authors: Pei-Ying Li, Kai-Yu Cheng, Xiu-Cheng Zheng, Pu Liu, Xiu-Juan Xu
      Abstract: Functional Materials Letters, Ahead of Print.
      Chitosan-ionic liquid conjugation (CILC), which was prepared through the reaction of 1-(4-bromobutyl)-3-methylimidazolium bromide (BBMIB) with chitosan, was firstly used to prepare functionalized graphene composite via the chemical reduction of graphene oxide (GO). The obtained water soluble graphene-based composite was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible (UV–Vis) spectroscopy and so on. CILC-RGO showed excellent dispersion stability in water at the concentration of 2.0 mg/mL, which was stable for several months without any precipitate. This may be ascribed to the electrostatic attraction and [math]–[math] interaction between CILC and graphene.
      Citation: Functional Materials Letters
      PubDate: 2016-04-14T06:39:55Z
      DOI: 10.1142/S1793604716500454
       
  • Covalent modification of graphite oxide with acetic anhydride to enhance
           dispersibility in organic solvents
    • Authors: Jingjing Li, Anwei Yang, Chen Zhang, Lei Zhang, Feifei Sun, Ning Ma
      Abstract: Functional Materials Letters, Ahead of Print.
      Graphite oxide (GO) was modified by acetic anhydride via a catalyzed ring-opening reaction of the attached epoxy groups at very mild condition. The dispersion of the modified GO is thus largely imporved in many organic solvents and the highest GO concentration reaches 2.0[math]mg/mL in alkyl(aryl) chlorides, ethers, alcohols and cyclohexane, which is amongst the highest value for GO in organics.
      Citation: Functional Materials Letters
      PubDate: 2016-04-12T03:12:37Z
      DOI: 10.1142/S1793604716500442
       
  • Revealing the nanodomain structure of silicon oxycarbide via preferential
           etching and pore analysis
    • Authors: Haolin Wu, Jie Yang, Haibiao Chen, Feng Pan
      Abstract: Functional Materials Letters, Ahead of Print.
      Preferentially etching either carbon or silica from silicon oxycarbide (SiOC) created a porous network as an inverse image of the removed phase. The porous structure was analyzed by gas adsorption, and the experimental results verified the nanodomain structure of SiOC. This work demonstrated a novel approach for analyzing materials containing nanocomposite structures.
      Citation: Functional Materials Letters
      PubDate: 2016-04-07T08:55:11Z
      DOI: 10.1142/S1793604716500430
       
  • A study on the effect of surface topography on the actuation performance
           of stacked-rolled dielectric electro active polymer actuator
    • Authors: Usha Sait, Sreekumar Muthuswamy
      Abstract: Functional Materials Letters, Ahead of Print.
      Dielectric electro active polymer (DEAP) is a suitable actuator material that finds wide applications in the field of robotics and medical areas. This material is highly controllable, flexible, and capable of developing large strain. The influence of geometrical behavior becomes critical when the material is used as miniaturized actuation devices in robotic applications. The present work focuses on the effect of surface topography on the performance of flat (single sheet) and stacked-rolled DEAP actuators. The non-active areas in the form of elliptical spots that affect the performance of the actuator are identified using scanning electron microscope (SEM) and energy dissipated X-ray (EDX) experiments. Performance of DEAP actuation is critically evaluated, compared, and presented with analytical and experimental results.
      Citation: Functional Materials Letters
      PubDate: 2016-04-05T04:08:33Z
      DOI: 10.1142/S1793604716500429
       
  • Simple and mass-produced mechanochemical preparation of graphene
           nanosheet/polyaniline composite assisted with bifunctional ionic liquid
    • Authors: Xiangjun Lu, Hui Dou
      Abstract: Functional Materials Letters, Ahead of Print.
      Graphene nanosheet/polyaniline (GNS/PANI) composite was prepared by a simple and mass-produced mechanochemical method, where the functionalized ionic liquid 1-(3-sulfonic acid) propyl-3-methylimidazolium hydrogen sulfate conducts as not only the dispersant of GNS but also the dopant of PANI. The GNS/PANI composite characterized by Fourier transformation infrared spectra, UV–Vis spectra and X-ray diffraction shows that the resulting PANI in composite is in its doped, conductive emeraldine oxidation state. Scanning electron microscope images reveal that the GNS/PANI composite with PANI uniformly coated on the surface of GNS is randomly stacking. Compared with pure PANI, the GNS/PANI composite has higher electrical conductivity, better thermal stability and electrochemical activity due to the presence of GNS.
      Citation: Functional Materials Letters
      PubDate: 2016-04-05T04:08:33Z
      DOI: 10.1142/S1793604716500417
       
  • Hydrothermal synthesis of BaYbF5:Tm[math] nanoparticles for dual-modal
           upconversion near-infrared luminescence and magnetic resonance imaging
    • Authors: Ping Liu, Wei Miu
      Abstract: Functional Materials Letters, Ahead of Print.
      In this paper, we demonstrate multifunctional upconversion nanoparticles with intense near-infrared emission and unique magnetic properties for dual-modal upconversion luminescent bioimaging and T2-weighted magnetic resonance imaging. High-quality BaYbF5:Tm[math] nanoparticles are synthesized via a hydrophobic method and then converted to be hydrophilic via a hydrochloric acid treatment. The as-synthesized nanoparticles are cubic phase and about 6[math]nm in diameter with narrow size distribution. The intense near-infrared emission makes these nanoparticles can be acted as bio-probes in upconversion luminescent bioimaging with deep tissue penetration. Besides, these nanoparticles can also be used as T2-weighted contrast agents in magnetic resonance imaging due to the high value of relaxation rate ([math]) in 0.55[math]T. This finding may have further bio-applications in the future due to the high performance of these BaYbF5:Tm[math] nanoparticles in dual-modal bioimaging.
      Citation: Functional Materials Letters
      PubDate: 2016-03-31T10:44:35Z
      DOI: 10.1142/S1793604716500387
       
  • Measuring photoluminescence spectra of self-assembly array nanowire of
           colloidal CdSe quantum dots using scanning near-field optics microscopy
    • Authors: Zhongchen Bai, Licai Hao, Zhengping Zhang, Shuijie Qin
      Abstract: Functional Materials Letters, Ahead of Print.
      A novel periodic array CdSe nanowire is prepared on a substrate of the porous titanium dioxide by using a self-assembly method of the colloidal CdSe quantum dots (QDs). The experimental results show that the colloidal CdSe QDs have renewedly assembled on its space scale and direction in process of losing background solvent and form the periodic array nanowire. The main peak wavelength of Photoluminescence (PL) spectra, which is measured by using a 100-nm aperture laser beam spot on a scanning near-field optics microscopy, has shifted 60[math]nm with compared to the colloidal CdSe QDs. Furthermore, we have measured smaller ordered nanometer structure in thin QDs area as well, a 343-nm periodic nanowire in thick QDs area and the colloidal QDs in edge of well-ordered nanowire.
      Citation: Functional Materials Letters
      PubDate: 2016-03-31T10:44:34Z
      DOI: 10.1142/S1793604716500405
       
  • Fabrication of hierarchically ordered porous scheelite-related monoclinic
           BiVO4 nanotubes by electrochemical deposition
    • Authors: Martin Davi, Sebastian Peter, Adam Slabon
      Abstract: Functional Materials Letters, Ahead of Print.
      Scheelite-related monoclinic BiVO4 is one of the most promising metal oxide photoanode materials. It is therefore highly desirable to explore its new nanostructured morphologies in order to achieve higher performance. We present a new method for the fabrication of porous BiVO4 nanotubes. Powder XRD experiments show that the electrodeposited BiVO4 nanotubes crystallize in the scheelite-related monoclinic phase. The produced BiVO4 nanotubes are highly hierarchically ordered and aligned perpendicular to the electrically conductive substrate. The nanostructures were produced by template-assisted electrochemical deposition inside porous anodized alumina oxide. Our method may be extended to other semiconductor materials used in photoelectrochemical systems, such as Bi2WO6 and [math]-Bi2MoO6.
      Citation: Functional Materials Letters
      PubDate: 2016-03-31T10:44:34Z
      DOI: 10.1142/S1793604716500363
       
  • Fabrication, characterization and magnetic properties of Na-doped ZnO
           nanorods
    • Authors: Jingyuan Piao, Li-Ting Tseng, Kiyonori Suzuki, Jiabao Yi
      Abstract: Functional Materials Letters, Ahead of Print.
      Na-doped ZnO nanorods have been fabricated through a hydrothermal method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses indicate that the d spacing of ZnO increases with increasing doping concentration, suggesting the effective incorporation of dopant Na in the samples. Electron paramagnetic resonance (EPR) measurements indicate that there are shallow donors in pure ZnO samples and the shallow donors are strongly prohibited by Na doping. In addition, the resonance at [math] suggests the formation of Zn vacancies. Magnetic measurements indicate that pure ZnO is paramagnetic and Na doping leads to ferromagnetism at room temperature. Moreover, 0.5% Na-doped ZnO nanorods exhibits the largest saturation magnetization.
      Citation: Functional Materials Letters
      PubDate: 2016-03-31T10:44:31Z
      DOI: 10.1142/S1793604716500399
       
  • Crystallization mechanism and kinetics of mayenite glass prepared by
           aerodynamic levitation method
    • Authors: Jiao Duan, Yan Liu, Yanjing Gu, Xiuhong Pan, Xiaojie Zheng, Wei Wang, Huimei Yu, Jianding Yu
      Abstract: Functional Materials Letters, Ahead of Print.
      The mayenite glass with a wide high-temperature stability ([math]C) was innovatively synthesized by the aerodynamic levitation (ADL) containerless technique without conventional glass-forming addictives. The crystallization mechanism and kinetics of mayenite glass were studied by X-ray diffraction (XRD), scaning electron microscopy (SEM), Raman spectra and differential scanning calorimetry (DSC) analysis. The crystallization mechanism study revealed that structure and morphology mainly evolved near the crystallization peak temperature by the networking process of isolated AlO4 tetrahedra units, resulting in the growth mechanism changing from “two-dimensional” to “three-dimensional”. Crystallization kinetics calculations based on the non-isothermal Matusita model indicated that the activation energy for the crystallization of mayenite glass was 844[math]kJ[math]mol[math]. The calculated growth morphology parameters (m and n) also confirmed the surface crystallization along with bulk crystallization mechanism for the mayenite glass. This present study supplied a thermal–physical understanding about the crystallization of mayenite glass, which could be further applied in the exploitation of glass/glass–ceramics in the CaO–Al2O3 binary system.
      Citation: Functional Materials Letters
      PubDate: 2016-03-31T10:44:30Z
      DOI: 10.1142/S1793604716500375
       
  • Preparation and low-frequency microwave-absorbing properties of
           MWCNTs/Co–Ni/Fe3O4 hybrid material
    • Authors: Shao-Wei Lu, Chao-Jun Yuan, Cai-Xia Jia, Ke-Ming Ma, Xiao-Qiang Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      MWCNTs/Co–Ni/Fe3O4 hybrid material has been successfully prepared by electroless plating and coprecipitation method, which is applied to the low-frequency microwave absorption. Their surface morphology, structure, magnetism and electromagnetic properties in the low-frequency range of 1–4[math]GHz were characterized by field-emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and vector network analyzer. Results indicated that magnetic Co–Ni/Fe3O4 particles were attached on the surface of multi-walled carbon nanotubes successfully. The saturation magnetization of MWCNTs/Co–Ni/Fe3O4 hybrid materials was 68.6[math]emu/g and the coercivity is 17.9 Oe. The electromagnetic and microwave absorbing properties analysis in the low-frequency range of 1–4[math]GHz indicated that the hybrid material exhibited excellent magnetic loss and the maximum reflection loss could reach [math][math]dB at 1.51GHz with 1.05[math]GHz bandwidth below [math][math]dB.
      Citation: Functional Materials Letters
      PubDate: 2016-03-09T08:09:12Z
      DOI: 10.1142/S1793604716500351
       
 
 
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