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  Subjects -> ENERGY (Total: 309 journals)
    - ELECTRICAL ENERGY (2 journals)
    - ENERGY (185 journals)
    - ENERGY: GENERAL (8 journals)
    - NUCLEAR ENERGY (30 journals)
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ENERGY (185 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: 5)
Advances in High Energy Physics     Open Access   (Followers: 21)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
American Journal of Energy Research     Open Access   (Followers: 9)
Annals of Nuclear Energy     Hybrid Journal   (Followers: 8)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 3)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 12)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Solar Energy     Hybrid Journal   (Followers: 16)
Archives of Thermodynamics     Open Access   (Followers: 8)
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: 3)
Batteries     Open Access   (Followers: 3)
Biofuel Research Journal     Open Access   (Followers: 4)
Biofuels     Hybrid Journal   (Followers: 10)
Biofuels Engineering     Open Access  
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Bulletin de droit nucleaire     Full-text available via subscription   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 21)
Carbon Management     Hybrid Journal   (Followers: 6)
Catalysis for Sustainable Energy     Open Access   (Followers: 5)
CERN courier. International journal of high energy physics     Free   (Followers: 7)
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: 4)
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: 8)
Electrical and Power Engineering Frontier     Open Access   (Followers: 21)
Electricity Journal     Partially Free   (Followers: 1)
ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations     Open Access   (Followers: 1)
Energy     Partially Free   (Followers: 24)
Energy & Environment     Hybrid Journal   (Followers: 16)
Energy & Fuels     Full-text available via subscription   (Followers: 26)
Energy and Buildings     Hybrid Journal   (Followers: 10)
Energy and Emission Control Technologies     Open Access   (Followers: 4)
Energy and Environment Focus     Free   (Followers: 6)
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: 17)
Energy Conversion and Management     Hybrid Journal   (Followers: 10)
Energy Efficiency     Hybrid Journal   (Followers: 11)
Energy Harvesting and Systems : Materials, Mechanisms, Circuits and Storage     Hybrid Journal   (Followers: 3)
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: 58)
Energy Prices and Taxes     Full-text available via subscription   (Followers: 5)
Energy Procedia     Open Access   (Followers: 2)
Energy Reports     Open Access   (Followers: 4)
Energy Research & Social Science     Full-text available via subscription   (Followers: 4)
Energy Science & Engineering     Open Access   (Followers: 3)
Energy Science and Technology     Open Access   (Followers: 12)
Energy Storage Materials     Full-text available via subscription   (Followers: 1)
Energy Strategy Reviews     Partially Free   (Followers: 9)
Energy Studies Review     Open Access   (Followers: 5)
Energy Systems     Hybrid Journal   (Followers: 13)
Energy Technology     Partially Free   (Followers: 5)
Energy Technology & Policy     Open Access   (Followers: 2)
Energy, Sustainability and Society     Open Access   (Followers: 17)
Environmental Progress & Sustainable Energy     Hybrid Journal   (Followers: 8)
EPJ Photovoltaics     Open Access   (Followers: 4)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Renewable Energy     Full-text available via subscription   (Followers: 2)
Frontiers in Energy     Hybrid Journal   (Followers: 3)
Frontiers in Energy Research     Open Access   (Followers: 3)
Fuel and Energy Abstracts     Full-text available via subscription   (Followers: 5)
Functional Materials Letters     Hybrid Journal   (Followers: 1)
Gcb Bioenergy     Open Access   (Followers: 2)
Geomechanics for Energy and the Environment     Full-text available via subscription   (Followers: 1)
Geothermal Energy     Open Access   (Followers: 3)
Geothermal Energy Science     Open Access   (Followers: 1)
Green     Hybrid Journal   (Followers: 1)
Green Energy & Environment     Open Access   (Followers: 2)
IEA Electricity Information     Full-text available via subscription   (Followers: 2)
IEA Natural Gas Information     Full-text available via subscription   (Followers: 3)
IEEE Power and Energy     Full-text available via subscription   (Followers: 24)
IEEE Transactions on Energy Conversion     Hybrid Journal   (Followers: 11)
IEEE Transactions on Nuclear Science     Hybrid Journal   (Followers: 9)
IEEE Transactions on Power Systems     Hybrid Journal   (Followers: 27)
IET Power Electronics     Hybrid Journal   (Followers: 26)
Ingeniería Energética     Open Access  
Innovations : Technology, Governance, Globalization     Hybrid Journal   (Followers: 12)
International Journal of Alternative Propulsion     Hybrid Journal   (Followers: 6)
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: 9)
International Journal of Emerging Electric Power Systems     Hybrid Journal   (Followers: 5)
International Journal of Emerging Multidisciplinary Fluid Sciences     Full-text available via subscription   (Followers: 2)
International Journal of Energy and Environmental Engineering     Open Access   (Followers: 4)
International Journal of Energy and Power     Open Access   (Followers: 9)
International Journal of Energy and Statistics     Hybrid Journal   (Followers: 2)
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: 5)
International Journal of Global Energy Issues     Hybrid Journal   (Followers: 8)
International Journal of Green Energy     Hybrid Journal   (Followers: 9)
International Journal of Hydrogen Energy     Partially Free   (Followers: 14)
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: 4)
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 Ocean and Climate Systems     Open Access   (Followers: 7)
International Journal of Power and Energy Conversion     Hybrid Journal   (Followers: 3)
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: 3)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 7)
International Journal of Thermodynamics     Open Access   (Followers: 9)
Journal of Alternate Energy Sources & Technologies     Full-text available via subscription  
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 6)
Journal of China Coal Society     Open Access  
Journal of Computational Multiphase Flows     Open Access  
Journal of Energy     Open Access  
Journal of Energy & Natural Resources Law     Hybrid Journal   (Followers: 2)
Journal of Energy Chemistry     Full-text available via subscription   (Followers: 2)
Journal of Energy in Southern Africa     Open Access   (Followers: 2)
Journal of Energy Storage     Full-text available via subscription  
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: 8)
Journal of Nano Energy and Power Research     Full-text available via subscription   (Followers: 4)
Journal of Nuclear Energy Science & Power Generation Technology     Hybrid Journal   (Followers: 2)
Journal of Ocean Engineering and Marine Energy     Hybrid Journal   (Followers: 2)
Journal of Physical Chemistry C     Full-text available via subscription   (Followers: 28)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 8)
Journal of Radiological Protection     Full-text available via subscription   (Followers: 4)
Journal of Renewable Energy     Open Access   (Followers: 6)
Journal of Semiconductors     Full-text available via subscription   (Followers: 3)
Journal of Solar Energy     Open Access   (Followers: 8)
Journal of Solar Energy Engineering     Full-text available via subscription   (Followers: 18)
Journal of Sustainable Bioenergy Systems     Full-text available via subscription   (Followers: 1)
Journal of Sustainable Energy Engineering     Full-text available via subscription   (Followers: 1)
Journal of Technology Innovations in Renewable Energy     Hybrid Journal  
Materials for Renewable and Sustainable Energy     Open Access   (Followers: 8)
Natural Resources     Open Access   (Followers: 2)
Nature Energy     Hybrid Journal   (Followers: 5)
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: 12)
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: 11)
Oil, Gas, Coal and Electricity - Quarterly Statistics - Electricite, charbon, gaz et petrole - Statistiques trimestrielles     Full-text available via subscription   (Followers: 9)
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   (Followers: 1)
Radiochimica Acta     Hybrid Journal   (Followers: 5)
Radioprotection     Hybrid Journal   (Followers: 1)
Science and Technology of Nuclear Installations     Open Access   (Followers: 2)
Smart Grid and Renewable Energy     Open Access   (Followers: 9)
Solar Energy     Hybrid Journal   (Followers: 20)
Solar Energy Materials and Solar Cells     Hybrid Journal   (Followers: 32)
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: 7)
Surface Science Reports     Full-text available via subscription   (Followers: 15)
Sustainable Energy     Open Access   (Followers: 1)
Sustainable Energy Technologies and Assessments     Full-text available via subscription  
Sustainable Energy, Grids and Networks     Hybrid Journal   (Followers: 1)
Technology Audit and Production Reserves     Open Access  
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: 11)
Water International     Hybrid Journal   (Followers: 13)
Wiley Interdisciplinary Reviews : Energy and Environment     Hybrid Journal   (Followers: 5)
Wind Energy     Hybrid Journal   (Followers: 4)
Wind Engineering     Hybrid Journal   (Followers: 3)

       | Last

Journal Cover Functional Materials Letters
  [SJR: 0.392]   [H-I: 19]   [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]
  • Magnetic structure of martensite in Ni–Mn–Ga–Co alloys
    • Abstract: Functional Materials Letters, Volume 10, Issue 01, February 2017.
      Ni[math]CoxMn[math]Ga[math] ([math]) alloys undergo martensitic transformation between ferromagnetic (FM) austenite and weak-magnetic martensite. However, the type of magnetism of martensite remains unclear. In this work, the results of a detailed study of the magnetic state of martensite in a Ni[math]Co7Mn[math]Ga[math] are shown. The evolution with post-quench ageing indicates that improvement of atomic order increases the FM contributions to the weak-magnetic martensite, major changes occurring as the austenite switches from paramagnetic (PM) to FM. The results are consistent with the presence of FM clusters inside a PM matrix.
      Citation: Functional Materials Letters
      PubDate: 2017-03-01T02:32:54Z
      DOI: 10.1142/S1793604717400094
       
  • Phase transformations of severely plastically deformed Ti–Ni–Pd
           high-temperature shape memory alloys
    • Abstract: Functional Materials Letters, Volume 10, Issue 01, February 2017.
      Severe plastic deformation of a Ti[math]Ni[math]Pd[math] high-temperature shape memory alloy yields a nanoscale mixture of an amorphous phase and retained lamellae of the parent B19 martensite. The thermal stability of the deformed martensite is significantly enhanced. Upon heating, B2 austenite occurs within the martensite and by crystallization of the amorphous phase, concomitant with recovery and the formation of an ultrafine grained structure. In the small grains, the B2 austenite to B19 martensitic transformation is shifted to lower temperatures and incomplete.
      Citation: Functional Materials Letters
      PubDate: 2017-03-01T02:32:42Z
      DOI: 10.1142/S1793604717400124
       
  • The research progress of polyhedral oligomeric silsesquioxane (POSS)
           applied to electrical energy storage elements
    • Abstract: Functional Materials Letters, Ahead of Print.
      Polyhedral oligomeric silsesquioxane (POSS) is a kind of organic–inorganic hybrid nanoparticle. This paper introduces the research progress of different kind of POSS organic–inorganic hybrid nanoparticles applied to lithium-ion batteries, fuel batteries, and supercapacitors by researchers on mechanical properties, thermal properties and electrochemistry properties. The results showed that the ionic conductivity of POSS/Li-ion solid polymer electrolyte reached 3.26[math][math][math]10[math][math]S/cm and mechanical properties were commendable. The proton conductivity of POSS hybrid proton exchange membranes came to the level of 6.46[math][math][math]10[math][math]S/cm and the mechanical strength was 18[math]MPa with less content of POSS. With the inorganic core of POSS, smaller and more uniform multi-pore electrode materials offer a new idea on the fabrication of supercapacitor electrode materials.
      Citation: Functional Materials Letters
      PubDate: 2017-02-22T08:40:11Z
      DOI: 10.1142/S1793604717300018
       
  • Editorial: Special Issue on Shape Memory Materials and Their
           Applications — Dedicated to Professor Dr. Jan Van Humbeeck
    • Abstract: Functional Materials Letters, Ahead of Print.

      Citation: Functional Materials Letters
      PubDate: 2017-02-20T08:02:51Z
      DOI: 10.1142/S1793604717020015
       
  • Core–shell Si/Cu nanocomposites synthesized by self-limiting surface
           reaction as anodes for lithium ion batteries
    • Abstract: Functional Materials Letters, Ahead of Print.
      Core–shell Si/Cu nanocomposites were synthesized via a flexible self-limiting surface reaction without extra reductant for the first time. The nano Si was uniformly coated with Cu nanoparticles with a diameter of 5–10[math]nm, which can enhance the electronic conductivity of the nanocomposites and buffer the huge volume change during charge/discharge owing to its high ductility. Benefited from the unique structure, the Si/Cu nanocomposites exhibited a good electrochemical performance as anodes for lithium ion batteries, which exhibited a capacity retention of 656[math]mAh/g after 50 cycles and a coulombic efficiency of more than 99%.
      Citation: Functional Materials Letters
      PubDate: 2017-02-17T08:01:53Z
      DOI: 10.1142/S1793604717500254
       
  • Regulations of aging time on optical properties of nano-crystalline ZnO
           thin films fabricated by sol–gel method
    • Abstract: Functional Materials Letters, Ahead of Print.
      Nano-crystalline Zinc oxide (ZnO) thin films on glass substrates have been fabricated by sol–gel method for different aging times. The thermal curve of the dried gel was examined and it was found that evaporation of solvent and the decomposition of the organics have completed before 250[math]C. X-ray diffraction patterns and Atomic Force Microscope images of samples only have a small difference of microstructure. The transmittance spectra revealed high transmittance in visible region. The optical band gap of the samples remined stable (3.28[math]eV). Also, the Urbach energy was calculated to explain the defect concentration. The Photoluminescence spectra in ultraviolet and visible regions were studied, and the decreased intensity of peaks at 387[math]nm and the increased emissions in visible range were found. The results showed that excessive aging time can cause degeneration of optical properties of thin films.
      Citation: Functional Materials Letters
      PubDate: 2017-02-17T08:01:49Z
      DOI: 10.1142/S1793604717500242
       
  • Improving photovoltaic performance of perovskite solar cells: The
           interfacial modification role of aluminum chloride and ammonia on ZnO
           nanorods
    • Authors: Zhaosong Li, Jun Zhang, Yang Xu, Mengni Xue, Hanbin Wang, Jinxia Duan, Hao Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      ZnO nanorods (ZnO NRs) as electron transport layer (ETL) in organometal halide perovskite solar cells (PSCs) had been prepared because of ZnO exhibiting excellent electron mobility and light transmission performance. The ZnO NRs were modified with a simple solvothermal method using aluminum chloride (AlCl3) and ammonia (NH[math]H2O) as precursor solution, the primary advantage of this approach was low temperature, simple process. The concentration of the precursor solution was further investigated, and a power conversion efficiency (PCE) of 12.1% was achieved.
      Citation: Functional Materials Letters
      PubDate: 2017-01-26T03:05:13Z
      DOI: 10.1142/S1793604717500175
       
  • Xylene-sensing of Fe2(MoO4)3 nanoplates prepared via a hydrothermal method
    • Abstract: Functional Materials Letters, Ahead of Print.
      Fe2(MoO4)3 nanoplates were prepared via a simple hydrothermal process. The average crystalline size of these nanoplates is 85.8[math]nm. The sensor based on Fe2(MoO4)3 shows a high gas sensing performance to xylene. The response of Fe2(MoO4)3 sensor is 25.9–100[math]ppm xylene at optimum operating temperature of 340[math]C. The response and recovery times to 100[math]ppm xylene are 4 and 10[math]s, respectively. Furthermore, the Fe2(MoO4)3 sensor exhibits remarkable selectivity detection of xylene gas with negligible responses to toluene and benzene. Therefore, the Fe2(MoO4)3 is a promising material for the detection of xylene gas sensors.
      Citation: Functional Materials Letters
      PubDate: 2017-01-23T07:52:57Z
      DOI: 10.1142/S1793604717500229
       
  • Complex transformation field created by geometrical gradient design of
           NiTi shape memory alloy
    • Authors: Reza Bakhtiari, Bashir S. Shariat, Fakhrodin Motazedian, Zhigang Wu, Junsong Zhang, Hong Yang, Yinong Liu
      Abstract: Functional Materials Letters, Ahead of Print.
      Owing to geometrical non-uniformity, geometrically graded shape memory alloy (SMA) structures by design have the ability to exhibit different and novel thermal and mechanical behaviors compared to geometrically uniform conventional SMAs. This paper reports a study of the pseudoelastic behavior of geometrically graded NiTi plates. This geometrical gradient creates partial stress gradient over stress-induced martensitic transformation, providing enlarged stress controlling interval for shape memory actuation. Finite element modeling framework has been established to predict the deformation behavior of such structures in tensile loading cycles, which was validated by experiments. The modeling results show that the transformation mostly propagates along the gradient direction as the loading level increases.
      Citation: Functional Materials Letters
      PubDate: 2017-01-17T11:34:00Z
      DOI: 10.1142/S1793604717400112
       
  • Ni cluster formation in low temperature annealed Ni50.6Ti49.4
    • Authors: Saeid Pourbabak, Xiebin Wang, Dirk Van Dyck, Bert Verlinden, Dominique Schryvers
      Abstract: Functional Materials Letters, Ahead of Print.
      Various low temperature treatments of Ni[math]Ti[math] have shown an unexpected effect on the martensitic start temperature. Periodic diffuse intensity distributions in reciprocal space indicate the formation of short pure Ni strings along the [math]111[math] directions in the B2 ordered lattice, precursing the formation of Ni4Ti3 precipitates formed at higher annealing temperatures.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:23:22Z
      DOI: 10.1142/S1793604717400057
       
  • Large and reversible elastocaloric effect near room temperature in a
           Ga-doped Ni–Mn–In metamagnetic shape-memory alloy
    • Authors: Juan-Pablo Camarillo, Christian-Omar Aguilar-Ortiz, Horacio Flores-Zúñiga, David Ríos-Jara, Daniel-Enrique Soto-Parra, Enric Stern-Taulats, Lluís Mañosa, Antoni Planes
      Abstract: Functional Materials Letters, Ahead of Print.
      We report a giant elastocaloric effect near room temperature in a polycrystalline Ga-doped Ni–Mn–In ferromagnetic shape-memory alloy. The elastocaloric effect has been quantified by measuring both isothermal stress-induced entropy changes and adiabatic stress-induced temperature changes. A reproducible maximum entropy change, [math] 25 [math][math][math], upon cycling across the martensitic transition was obtained by application of a compressive stress of 100[math]MPa. The corresponding maximum amount of cooling, [math][math]K, was measured when this stress was rapidly removed. These values are comparable with those reported for giant magnetocaloric materials, which are induced by application and release of a high magnetic field. Therefore, the studied material is a good candidate to be used in solid-state refrigeration devices based on the elastocaloric effect.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:23:14Z
      DOI: 10.1142/S1793604717400070
       
  • Fast growth of amorphous Si nanowires by direct current arc plasma jet
           chemical vapor deposition
    • Authors: Yongheng Wu, Mingji Li, Cuiping Li, Xiaoguo Wu, Baohe Yang, Hongji Li
      Abstract: Functional Materials Letters, Ahead of Print.
      Silicon (Si) nanowires were synthesized by direct current arc plasma jet chemical vapor deposition. It was found that growth temperature and growth time played important roles in the morphologies of the Si nanowires. The possible formation mechanism of Si nanowire was also proposed according to the corresponding results. In addition, the Ni particles are dispersed on the Si substrate with the help of alkaline etching, which enables the lateral growth of Si nanowires on a Si substrate. This offers a simple and practical way of synthesizing and positioning the Si nanowires on a substrate.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:23:11Z
      DOI: 10.1142/S1793604717500217
       
  • A short review on the interaction of precipitates and martensitic
           transitions in CuZnAl shape memory alloys
    • Authors: Franco de Castro Bubani, Francisco Carlos Lovey, Marcos Leonel Sade
      Abstract: Functional Materials Letters, Ahead of Print.
      The main effects of [math] non-equilibrium nanoprecipitates in CuZnAl shape memory alloys are briefly reviewed. Aspects related to the nucleation and growth of precipitates are commented on and their effect on stress induced martensitic transitions is analyzed. Results concerning the relationship between the size of precipitates and the hysteresis of the stress induced [math]-18R transition are studied. The improvement of the two-way shape-memory effect after the introduction of precipitates is shortly commented on. The 18R–6R transition is also analyzed and recent findings on the optimization of the mechanical reversibility associated to the 18R–6R transformation in a matrix with a high density of nano precipitates are reviewed.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:23:08Z
      DOI: 10.1142/S1793604717400069
       
  • Phenomena associated with diffusion, assisted by moving interfaces in
           shape memory alloys: A review of our earlier studies
    • Authors: Sergey Kustov, Konstantin Sapozhnikov, Xiebin Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      In this review, examples are given of a number of unusual phenomena, which we relate with the effect largely overlooked in shape memory alloys: diffusion of point-like defects, assisted by moving linear and planar defects — dislocations, twin and interphase boundaries.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:23:02Z
      DOI: 10.1142/S1793604717400100
       
  • Laser shape setting of superelastic nitinol wires: Functional properties
           and microstructure
    • Authors: Ausonio Tuissi, Mauro Coduri, Carlo Alberto Biffi
      Abstract: Functional Materials Letters, Ahead of Print.
      Shape setting is one of the most important steps in the production route of Nitinol Shape Memory Alloys (SMAs), as it can fix the functional properties, such as the shape memory effect and the superelasticity (SE). The conventional method for making the shape setting is performed at 400–500[math]C in furnaces. In this work, a laser beam was adopted for performing straight shape setting on commercially available austenitic Nitinol thin wires. The laser beam, at different power levels, was moved along the wire length for inducing the functional performances. Calorimetric, pseudo-elastic and microstructural features of the laser annealed wires were studied through differential scanning calorimetry, tensile testing and high energy X-ray diffraction, respectively. It can be stated that the laser technology can induce SE in thin Nitinol wires: the wire performances can be modulated in function of the laser power and improved functional properties can be obtained.
      Citation: Functional Materials Letters
      PubDate: 2017-01-10T08:22:58Z
      DOI: 10.1142/S1793604717400082
       
  • TiO2 nanotube array with “multi-layer” walled structure and
           its vulnerability to water
    • Authors: Chaorui Xue, Shengliang Hu, Wei Liu, Qing Chang, Tetsu Yonezawa, Jinlong Yang
      Abstract: Functional Materials Letters, Ahead of Print.
      “Multi-layer” walled TiO2 nanotube array has been prepared by anodization with post-treatment of ethanol. Two post-treatment methods, which were ethanol and water treatment respectively, exerted a marked and different effect on the structure of nanotube. With ethanol immersion, the “multi-layer” walled nanotube can be obtained, while water treatment cannot produce the “multi-layer” walled structure. The main reason could be the uptake of carbon and fluoride during anodization process. Compared with “single-layer” walled TiO2 nanotube, “multi-layer” walled TiO2 nanotube demonstrated higher photocatalytic activity.
      Citation: Functional Materials Letters
      PubDate: 2016-12-27T03:29:41Z
      DOI: 10.1142/S1793604717500199
       
  • Multi-stage martensitic transformation in Ni-rich NiTi shape memory alloys
    • Authors: Xiebin Wang, Bert Verlinden, Sergey Kustov
      Abstract: Functional Materials Letters, Ahead of Print.
      Precipitation hardening is an effective way to improve the functional stability of NiTi shape memory alloys. The precipitates, mainly Ni4Ti3, could be introduced by aging treatment in Ni-rich NiTi alloys. However, the presence of Ni4Ti3 precipitates could disturb the transformation behavior, resulting in the multi-stage martensitic transformation (MMT). With the presence of MMT, it is difficult to control the transformation behavior, and thus limits the applicability of NiTi alloys. In this work, previous efforts on explaining the observed MMT are summarized. The difficulties in developing a unified explanation are discussed, and a possible way to avoid the MMT is proposed.
      Citation: Functional Materials Letters
      PubDate: 2016-12-27T03:29:40Z
      DOI: 10.1142/S1793604717400045
       
  • Enhanced afterglow property of BaAl2O4:Eu2+, Dy3+ phosphors by adding
           Li2CO3
    • Authors: Junfeng Ma, Dongxiao Fan, Bingbing Niu, Xuena Lan
      Abstract: Functional Materials Letters, Ahead of Print.
      BaAl2O4:Eu2+, Dy3+ phosphors with a good long lasting property can be easily obtained via a solid state reaction assisted with Li2CO3. The influence of Li2CO3 quantity on the lattice structure of BaAl2O4:Eu2+, Dy3+ phosphors, their photoluminescence (PL) property, and decaying process was studied by XRD, PL, and afterglow decay measurement, respectively. The results show that incorporating Li2CO3 in preparing process would obviously affect their lattice structure, accompanied by the variation of their luminescent property. With the increase of Li2CO3, their fluorescence property would gradually increase, at [math] ([math] reach their maximum emission intensity, and then decrease; but their phosphorescence property would continue to strengthen whether in brightness and decaying time up to [math], and then decrease.
      Citation: Functional Materials Letters
      PubDate: 2016-12-27T03:29:40Z
      DOI: 10.1142/S1793604717500205
       
  • A new three-phase heterocrystal catalysts and their superior treatment
           efficiency for tetracycline
    • Authors: Feng-Rui Wang, Hui-Ping Sun, Yan Wang, Jin-Ku Liu, Yi Fang, Jian-Dong Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      An easy recyclable and interesting Ag3PO4@Pt@TiO2 (APTP) three-phase heterocrystal chains were self-assembled by the cohesive action and chemical construction of polyvinylpyrrolidone (PVP). We found that a new electron–hole transmission path has been built via the rematch of the band structure of Ag3PO4, Pt and TiO2 which extends the light absorption and promoted the electron–hole separation to treat the antibiotic residues in the water. Based on the thorough investigations, a new catalytic material was provided for antibiotics degradation. The catalytic activity of APTP toward the degradation of tetracycline solution was enhanced by 166.67% and the stability increased remarkably compared with pure Ag3PO4 through the integration of different functional components.
      Citation: Functional Materials Letters
      PubDate: 2016-12-23T02:10:25Z
      DOI: 10.1142/S1793604717500151
       
  • Micro pulling down growth of very thin shape memory alloys single crystals
    • Authors: I. López-Ferreño, J. San Juan, T. Breczewski, G. A. López, M. L. Nó
      Abstract: Functional Materials Letters, Ahead of Print.
      Shape memory alloys (SMAs) have attracted much attention in the last decades due to their thermo-mechanical properties such as superelasticity and shape memory effect. Among the different families of SMAs, Cu–Al–Ni alloys exhibit these properties in a wide range of temperatures including the temperature range of 100–200[math]C, where there is a technological demand of these functional materials, and exhibit excellent behavior at small scale making them more competitive for applications in Micro Electro-Mechanical Systems (MEMS). However, polycrystalline alloys of Cu-based SMAs are very brittle so that they show their best thermo-mechanical properties in single-crystal state. Nowadays, conventional Bridgman and Czochralski methods are being applied to elaborate single-crystal rods up to a minimum diameter of 1[math]mm, but no works have been reported for smaller diameters. With the aim of synthesizing very thin single-crystals, the Micro-Pulling Down ([math]-PD) technique has been applied, for which the capillarity and surface tension between crucible and the melt play a critical role. The [math]-PD method has been successfully applied to elaborate several cylindrical shape thin single-crystals down to 200[math][math]m in diameter. Finally, the martensitic transformation, which is responsible for the shape memory properties of these alloys, has been characterized for different single-crystals. The experimental results evidence the good quality of the grown single-crystals.
      Citation: Functional Materials Letters
      PubDate: 2016-12-23T02:03:32Z
      DOI: 10.1142/S1793604717400033
       
  • Anatase TiO2/cellulose hybrid paper: Synthesis, characterizations, and
           photocatalytic activity for degradation of indigo carmine dye
    • Authors: Yue Jiao, Caichao Wan, Jian Li
      Abstract: Functional Materials Letters, Ahead of Print.
      We report a facile easy method to deposit anatase titania (TiO[math] on cellulose paper. The anatase TiO2/cellulose paper (ATCP) was characterized by scanning electron microscopy, transmission electron microscope, energy dispersive X-ray spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. This hybrid paper with the anatase TiO2 content of around 13.86[math]wt.% can serve as an eco-friendly flexible photocatalyst, which can rapidly degrade blue indigo carmine dye into a colorless solution within 30[math]min under UV radiation. Moreover, compared to commercially available TiO2 P25 and anatase TiO2 powder, a faster decomposition rate of indigo carmine dye was acquired when using ATCP. These results suggest that this hybrid paper might be useful in the treatment of organic dye wastewater.
      Citation: Functional Materials Letters
      PubDate: 2016-12-23T02:03:31Z
      DOI: 10.1142/S1793604717500187
       
  • Optimizing Ni–Ti-based shape memory alloys for ferroic cooling
    • Authors: A. Wieczorek, J. Frenzel, M. Schmidt, B. Maaß, S. Seelecke, A. Schütze, G. Eggeler
      Abstract: Functional Materials Letters, Ahead of Print.
      Due to their large latent heats, pseudoelastic Ni–Ti-based shape memory alloys (SMAs) are attractive candidate materials for ferroic cooling, where elementary solid-state processes like martensitic transformations yield the required heat effects. The present work aims for a chemical and microstructural optimization of Ni–Ti for ferroic cooling. A large number of Ni–Ti-based alloy compositions were evaluated in terms of phase transformation temperatures, latent heats, mechanical hysteresis widths and functional stability. The aim was to identify material states with superior properties for ferroic cooling. Different material states were prepared by arc melting, various heat treatments and thermo-mechanical processing. The cooling performance of selected materials was assessed by differential scanning calorimetry, uniaxial tensile loading/unloading, and by using a specially designed ferroic cooling demonstrator setup. A Ni[math]Ti[math]Cu5V[math] SMA was identified as a potential candidate material for ferroic cooling. This material combines extremely stable pseudoelasticity at room temperature and a very low hysteresis width. The ferroic cooling efficiency of this material is four times higher than in the case of binary Ni–Ti.
      Citation: Functional Materials Letters
      PubDate: 2016-12-23T02:03:30Z
      DOI: 10.1142/S179360471740001X
       
  • Effect of Al addition on superelastic properties of
           Ti–Zr–Nb-based alloys
    • Authors: Hee Young Kim, Keisuke Nakai, Jie Fu, Shuichi Miyazaki
      Abstract: Functional Materials Letters, Ahead of Print.
      The effects of Al addition on the superelastic properties of Ti–Zr–Nb alloys were investigated. Ti–18Zr–(12–16)Nb–(0–4)Al (at.%) alloys were prepared by the Ar arc melting method and superelastic properties, transformation temperature, and transformation strain were investigated quantitatively. The superelastic strain increased by the addition of Al and a large recovery strain of 6.1% was observed in a Ti–18Zr–13.5Nb–3Al alloy. The large superelastic strain of Al-added alloys was found to be due to a large transformation strain and a strong recrystallization texture.
      Citation: Functional Materials Letters
      PubDate: 2016-12-23T02:03:28Z
      DOI: 10.1142/S1793604717400021
       
  • Micro-sized K2SiF6:Mn[math] red phosphors for light emitting diodes
           synthesized by a simple method
    • Authors: Yurong Shi, Wan Li, Yan Wen
      Abstract: Functional Materials Letters, Ahead of Print.
      Micro-sized K2SiF6:Mn[math] red phosphor was prepared by a simple method. Oleic acid (OA) was used as dispersant and reductant. In a fixed condition of the mole ratio of SiO2/KMnO4, the effects of the volume of OA on the morphology and luminescence properties were studied. X-ray diffraction (XRD) was used to characterize the phase. Scanning electron microscopy (SEM) and luminescence spectra were carried out to identify the morphology and the luminescence properties, respectively. The results show that the dispersive particles of K2SiF6:Mn[math] red phosphor [math] 3[math][math]m larger was obtained, which is suitable for industrial applications.
      Citation: Functional Materials Letters
      PubDate: 2016-12-22T08:16:33Z
      DOI: 10.1142/S1793604717500163
       
  • Size distribution and visible luminescence of silicon nanoparticles
           embedded in SiNx thin film: Role of RF power in PECVD
    • Authors: Luis Andres Gómez-González, Ateet Dutt, Betsabee Marel Monroy, Juan David Escobar-Carrasquilla, Guillermo Santana, Carlos Álvarez-Macías, Arturo Ponce
      Abstract: Functional Materials Letters, Ahead of Print.
      This paper presents, the studies of the influence of (radio frequency) RF power on the size distribution and visible photoluminescence (PL) of SiNx thin film deposited at 300[math]C of substrate temperature by plasma enhanced chemical vapor deposition. RF power was varied (5–50[math]W), and its aftereffect on the optical properties of thin films was investigated. By increasing the RF power between 5[math]W and 25[math]W, main PL peak showed a red shift with an increase in PL intensity, which is associated with an increase in the silicon nanocrystals size and density, respectively. Results obtained were confirmed with High-resolution transmission electron microscopy micrographs and from the statistical calculations. By attaining a precise RF power value, stable silicon nitride thin film with suitable optical properties can be achieved for the potential fabrication of optoelectronic devices.
      Citation: Functional Materials Letters
      PubDate: 2016-12-05T10:47:32Z
      DOI: 10.1142/S179360471750014X
       
  • Influence of aqueous KOH and H2SO4 electrolytes ionic parameters on the
           performance of carbon-based supercapacitor electrodes
    • Authors: Mohamad Faizal Yusman Mohd Hanappi, Mohamad Deraman, Mohd Suleman, Najah Syahirah Mohd Nor, Noor Ezniera Shafieza Sazali, Ellisa Hamdan, Nurul Syazwani Moh Tajuddin, Nur Hamizah Basri, Mohd Redwani Mohd Jasni, Mohd Amir Radhi Othman
      Abstract: Functional Materials Letters, Ahead of Print.
      In this paper, the suitability of aqueous KOH and H2SO4 electrolytes in terms of ionic size, mobility, conductivity and energy of electrolyte ions with the porosity of activated carbon electrodes are demonstrated. These parameters of ions (K[math], OH[math], H[math], SO[math]) are found to affect the overall performances of supercapacitor cells as observed from the results of EIS, CV and GCD studies. The cell using H2SO4 electrolyte exhibits better performance with relatively low value of charge transfer resistance (0.57[math][math]), overall cell resistance, 19[math][math] (at 10[math]mHz) and high value of specific capacitance 547[math]F g[math] (at 1[math]mV s[math]), specific energy 10[math]W h kg[math] (at 0.5[math]A g[math]) and specific power, 490[math]W kg[math]. These results show that aqueous acid electrolyte is more compatible with carbon electrodes which could be due to the higher ionic energies of H[math] and SO[math] ions.
      Citation: Functional Materials Letters
      PubDate: 2016-12-05T10:47:32Z
      DOI: 10.1142/S1793604717500138
       
  • Inhomogeneous crystallinity and its influence on piezoelectricity of
           Bi[math]TiO[math]-BaTiO3 polar composites fabricated by thermal gradient
           sintering
    • Authors: Dan Yu, Minglei Zhao, Chunlei Wang, Lihai Wang, Shirui Yan, Yafei Wang, Zhigang Gai
      Abstract: Functional Materials Letters, Ahead of Print.
      We have previously described the enhancement of piezoelectricity in low crystallinity Bi[math]TiO[math]–BaTiO3 (BTO-BT) nanocomposites. This poses a question regarding the effect of the crystallinity on piezoelectricity. Here, the variation of crystallinity and structure that was developed along the temperature gradient was confirmed. The magnitude of the piezoelectric constant was found to have great relationship with the crystallinity and distortion of BiO5 polyhedra of amorphous Bi[math]TiO[math]. The highest piezoelectric constant of 13pC/N was obtained together with the lowest crystallinity and highest degree of distortion of BiO5 polyhedra. These results highlight the key role of the amorphous phase and further confirm the importance of distortion of BiO5 polyhedra in influencing the piezoelectricity. In this view, one may also expect that macroscopic polarity could be improved by increasing the amorphous content and the degree distortion of the BiO5 bonding units in the system.
      Citation: Functional Materials Letters
      PubDate: 2016-11-29T11:58:28Z
      DOI: 10.1142/S1793604717500114
       
  • Transmission electron microscopy characterization of protective
           La[math]Sr[math]MnO3−[math] coatings prepared by electrostatic spray
           deposition on ferritic alloy
    • Authors: Leandro da Conceição, Sabine Lay, Florence Robaut, Gilles Renou, E. N. S. Muccillo, Elisabeth Djurado
      Abstract: Functional Materials Letters, Ahead of Print.
      The effect of La[math]Sr[math]MnO[math] (LSM) coating on SS446 steel on air oxidation at 800[math]C was investigated by transmission electron microscopy. Dense and crack free thin LSM films were prepared by electrostatic spray deposition. The microstructural characterization was carried out on coated and uncoated interconnectors. A thin chromia scale at the alloy interface along with two spinel phases were observed after long term oxidation in both cases. Specimens exhibit, in addition, an SiO2 layer at the interface with steel due to the high content of Si in the steel. Significant changes in the thickness, morphology and composition occurred in the reaction layer for the LSM coated steel. These effects are explained on the basis of changes in the diffusive fluxes during exposure to the oxidation treatment. The implications of these effects for the degradation mechanism of LSM-based interconnects are discussed.
      Citation: Functional Materials Letters
      PubDate: 2016-11-29T11:58:27Z
      DOI: 10.1142/S1793604717500126
       
  • Paramagnetic bioactive silver- and gold-containing nanocomposites based on
           humic substances
    • Authors: Spartak S. Khutsishvili, Nikolay I. Tikhonov, Marina V. Lesnichaya, Gania Dolmaa, Tamara I. Vakul’skaya, Galina P. Aleksandrova, Boris G. Sukhov
      Abstract: Functional Materials Letters, Ahead of Print.
      A novel comparative study of paramagnetic properties of new silver- and gold-containing nanocomposites based on humic substances, extracted from medicinal muds, brown coal and shale deposits of Mongolia, has been carried out by electron paramagnetic resonance (EPR) spectroscopy. The change in the paramagnetic properties of metal nanocomposites obtained after metal introduction as compared with the starting substances has been found out. The dependence of stability, antioxidant activity and spin density on the nature and mass content of metal in the nanocomposites has been determined. Metal-containing nanocomposites are characterized by cw-EPR, X-ray diffraction (XRD) and atomic absorption analysis. It is shown that the resulting magnetic bioactive nanocomposites are stable for a long period thus suggesting their prospective use in medicine.
      Citation: Functional Materials Letters
      PubDate: 2016-11-23T06:46:55Z
      DOI: 10.1142/S1793604716500776
       
  • Co4I3O[math]H[math]3H2O: A new amorphous semiconductor with intrinsical
           photocatalytic performance in organic dye degradation driven by visible
           light
    • Authors: Jiayin Li, Xinping Ma, Caixian Zhao, Datang Li, Jianting Tang
      Abstract: Functional Materials Letters, Ahead of Print.
      Amorphous semiconductor photocatalysts are highly desirable because they are facile and low-cost to prepare in comparison with the crystalline ones. The amorphous semiconductor with photocatalytic activity has been rarely reported. In this work, a new amorphous semiconductor photocatalyst, Co4I3O[math]H[math][math][math][math]3H2O, was successfully developed. Its microstructure is composed of irregular particles with size of 2–20[math][math]m. In photocatalytic degradation of rhodamine B (RhB), or methylene blue (MB) dyes driven by visible light, the Co4I3O[math]H[math][math][math][math]3H2O sample exhibited pronounced activity. Its activity is higher than Degussa P25 (commercial TiO[math] in RhB degradation. It was testified that the degradation of RhB is due to the intrinsical photocatalytic role of Co4I3O[math]H[math][math][math][math]3H2O. The reusability of the Co4I3O[math]H[math][math][math][math]3H2O photocatalyst was also investigated.
      Citation: Functional Materials Letters
      PubDate: 2016-11-23T06:42:13Z
      DOI: 10.1142/S1793604717500084
       
  • Photovoltaic effect in dye-doped polymer films with free-surface and
           sandwich structures
    • Authors: Gennadiy V. Bulavko, Nikolay A. Davidenko, Anatoliy G. Shkavro, Oleg V. Tretyak, Alexander A. Ishchenko, Andrii V. Kulinich
      Abstract: Functional Materials Letters, Ahead of Print.
      Photovoltaic properties of the polymer composite films doped with cationic, anionic and neutral polymethine dyes were investigated. It was revealed that the magnitude and even the sign of photovoltaic effect change in going from the free-surface to sandwich structures. It was shown that in free-surface samples the photo-emf sign is determined by the nature of polymer and dye. By contrast, in sandwich structures the photo-emf sign does not depend on composition of the photoactive layer and is governed by drift of the photogenerated charge carriers in the electric field formed by different work function of the electron- and hole-collecting contacts.
      Citation: Functional Materials Letters
      PubDate: 2016-11-17T03:37:28Z
      DOI: 10.1142/S1793604717500072
       
  • Photoelectrocatalytic activity and reaction mechanism of Ag2S/Ag3PO4/Ni
           nanothin films for rhodamine B
    • Authors: Di Zhao, Jiali Fu, Yan Liu, Fenghua Guo, Aichang Li
      Abstract: Functional Materials Letters, Ahead of Print.
      Ag2S/Ag3PO4/Ni thin films were prepared using an electrochemical method. The surface morphology, phase structure, optical characteristics and band structure of the thin films were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV–Vis DRS), respectively. Additionally, the films photoelectrocatalytic (PEC) activity and stability were evaluated using rhodamine B (RhB) as a model compound. Ag2S/Ag3PO4/Ni thin films that were prepared under optimum conditions contained nanoparticles that were approximately 25[math]nm in size and exhibited high PEC activity. At an optimum cathodic bias of [math]0.60[math]V, the PEC degradation rate of RhB was 1.93 times greater than that of Ag3PO4/Ni thin film. Especially, the film displayed excellent PEC stability, even after being reused eight times. The possible PEC reactions between the film and RhB under visible-light irradiation are discussed in this paper.
      Citation: Functional Materials Letters
      PubDate: 2016-11-09T08:20:44Z
      DOI: 10.1142/S1793604717500059
       
  • Structurally engineered TiO2–SiO2 monolithic designs for the enhanced
           photocatalytic degradation of organic textile dye pollutants
    • Authors: T. V. L. Thejaswini, D. Prabhakaran, M. Akhila Maheswari
      Abstract: Functional Materials Letters, Ahead of Print.
      The rapid removal of organic textile dye (Acid Red-85) using mesoporous TiO2–SiO2 monoliths as photocatalyst material has been studied. The 7:3 mole% ratios of TiO2 and SiO2 within the framework provided a well-ordered cage-like monolithic design with high surface area and pore volume that facilitated faster and efficient degradation of the dye effluents. The photocatalyst has been characterized using XRD, TEM-SAED, UV–Vis-DRS, PL, TGA and BET analysis. The influence of various photocatalytic operational parameters, such as solution pH, dopant stoichiometry, catalyst dosage, dye concentration, kinetics, photo-oxidizers, etc., which could influence on the degradation efficiency, has been studied.
      Citation: Functional Materials Letters
      PubDate: 2016-11-09T08:20:43Z
      DOI: 10.1142/S1793604717500060
       
  • Synthesis and photocatalytic performance of Bi2S3/SnS2 heterojunction
    • Authors: LiZhen Ren, DongEn Zhang, XiaoYun Hao, Xin Xiao, JunYan Gong, MingYan Wang, ZhiWei Tong
      Abstract: Functional Materials Letters, Ahead of Print.
      Bi2S3/SnS2 heterostructured photocatalysts were synthesized from BiOI, SnCl[math]5H2O and NH2CSNH2 using an economic and simple hydrothermal method. The as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. The photodegradation activities of the Bi2S3/SnS2 heterostructured photocatalysts were estimated by degrading rhodamine B under simulated sunlight supplied by irradiating with a 350[math]W Xe lamp. Bi2S3/SnS2 photocatalysts were prepared using varying percentages of Bi2S3. The sample containing 13% Bi2S3 had the most efficient photocatalyst performance among the tested samples. The photocatalytic mechanism involves heterojunctions formed in the Bi2S3/SnS2, which promoted effective separation of photoinduced electrons and holes.
      Citation: Functional Materials Letters
      PubDate: 2016-11-09T08:20:42Z
      DOI: 10.1142/S1793604717500047
       
  • Visible light driven photocatalytic activity of Fe-doped ZnO nanocrystals
    • Authors: Bao-Gai Zhai, Long Yang, Qing-Lan Ma, Yuan Ming Huang
      Abstract: Functional Materials Letters, Ahead of Print.
      Fe-doped ZnO nanocrystals at the level of 8[math]mol% were synthesized via the co-precipitation method and then characterized by transmission electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy and UV–Vis absorption spectroscopy. Strong absorptions with its peak at around 500[math]nm were recorded in the range of 400–600[math]nm for Fe-doped ZnO nanocrystals. Visible-light driven photocatalytic activity of Fe-doped ZnO nanocrystals was demonstrated via the photocatalytic degradation of methyl orange dye. Density functional calculations show that Fe dopant can generate a deep trap level at Ev [math] 1.01[math]eV in the bandgap of ZnO, which is believed to be responsible for the visible light responsive photocatalytic activity of Fe-doped ZnO.
      Citation: Functional Materials Letters
      PubDate: 2016-11-02T07:56:20Z
      DOI: 10.1142/S1793604717500023
       
  • Sintering and kinetic mechanism of Si3N4-SiC micro-nano composite by spark
           plasma sintering
    • Authors: Mohammad Khajelakzay, Saeed Reza Bakhshi, Gholam Hossein Borhani, Mazaher Ramazani
      Abstract: Functional Materials Letters, Ahead of Print.
      Si3N4–SiC composites were fabricated by spark plasma sintering at 1700[math]C for 480 S with MgSiN2 and Y2O3 as additives. The morphology and phase characterization of the composites were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The values of [math] parameter indicate that the grain boundary reaction is the rate controller at 1500[math]C and diffusion becomes the controlling step at 1550[math]C. The nanohardness and Young’s modulus attained the maximum value of 18.5 and 316[math]GPa, respectively.
      Citation: Functional Materials Letters
      PubDate: 2016-11-02T07:56:20Z
      DOI: 10.1142/S1793604717500035
       
  • Enhanced magnetoelectric effect in Metglas/K[math] Na[math]NbO3/metglas
           lead-free ME laminates
    • Authors: S. D. Patil, S. S. Patil, V. G. Deonikar, K. Y. Rajpure, A. M. Shaikh
      Abstract: Functional Materials Letters, Ahead of Print.
      We report the magnetoelectric (ME) coupling in lead-free ME composites composed of Metglas (2605SA1) and K[math]Na[math]NbO3 (KNN) phases. Thickness of the magnetostrictive layers ([math] is changed by stacking number of Metglas layers ([math]25[math][math]m for each layer) while KNN is maintained at a fixed thickness ([math]300[math][math]m). As the number of Metglas layers increased, the peak magnitude of [math] first increases, reaches a maximum and then decreases afterward. The static magnetic field ([math], where [math] shows maximum magnitude shift toward a higher value as number of layers increases. The maximum value of [math] 91[math]mVcm[math]Oe[math] is observed for optimized thickness ratio of [math]/[math] 1 (i.e. [math] 5 layers) at [math] 160[math]Oe. The [math] is further enhanced by taking advantage of magnetic flux concentration effect of Metglas as a function of its sheet aspect ratio. The present composites can offer promising opportunities of engineering environmental friendly ME laminate for applications in ME devices such as energy harvester and magnetic field sensors.
      Citation: Functional Materials Letters
      PubDate: 2016-10-25T03:43:35Z
      DOI: 10.1142/S1793604716500764
       
  • Research of crystal changing of barium hexaferrite prepared by citric acid
           sol–gel method
    • Authors: Jianwu Liu, Cheng Guo, Yue Zhang
      Abstract: Functional Materials Letters, Ahead of Print.
      Barium hexaferrite was synthesized by combining citric acid sol–gel process with self-propagating at high temperature, relationship between the forming temperature of barium ferrite, and crystal phase was investigated in the experiment. The thermo-gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) were used in the analysis to discuss the influence of different amounts of citric acid additives on the calcination product crystal phase, and relationship of transformation of [math]-Fe2O3 to [math]-Fe2O3 between W-type and M-type of the crystal phase of barium hexaferrite. The results revealed that the crystal phase of barium hexaferrite was W-type when the value of CA/MN [math], and if CA/MN [math], the crystal phase became M-type. With the increase in the amount of citric acid, the crystallization temperature of product rose. The excessive citric acid additive changed the existing form of Fe, which contributed to the transformation of [math]-Fe2O3 to [math]-Fe2O3. The latter had greater thermal stability, resulting in an increase in the formation temperature of the W-type barium hexaferrite, and finally obtaining the M-type.
      Citation: Functional Materials Letters
      PubDate: 2016-10-25T03:43:34Z
      DOI: 10.1142/S1793604717500011
       
  • Proton-exchange membranes with enhanced anhydrous proton conductivity by
           room temperature ionic liquid anchored to silica
    • Authors: Pai Peng, Rong Qu, Jie Liu, Jing Xu, Dongzhi Chen, Xianze Yin, Hongwei Zhang
      Abstract: Functional Materials Letters, Ahead of Print.
      A strategy of immobilizing room temperature ionic liquid (RTIL) in proton-exchange membranes (PEMs) is demonstrated for the first time. After synthesized by ionic exchange and extraction, RTIL is anchored to the surfaces of silica nanoparticles (SiO2-RTIL) via condensation reaction. Then composite PEMs consisting of sulfonated poly(ether ether ketone) (SPEEK) and silica with RTIL are prepared through the solution casting method. The incorporation of SiO2-RTIL markedly improves the physical properties of the composite PEMs as compared to the plain SPEEK membrane, which was probably related to the plasticization and additional proton conductivity of the SiO2-RTIL. The anhydrous proton conductivity of the resultant composite PEM with 30% SiO2-RTIL was 50 times that of the plain membrane at 150[math]C.
      Citation: Functional Materials Letters
      PubDate: 2016-10-25T03:43:33Z
      DOI: 10.1142/S1793604716500752
       
  • Synthesis of Se/chitosan-derived hierarchical porous carbon composite as
           Li–Se battery cathode
    • Authors: Cheng Chen, Chenhao Zhao, Zhibiao Hu, Kaiyu Liu
      Abstract: Functional Materials Letters, Ahead of Print.
      The hierarchical porous carbon with overall macropores and surface micropores has been prepared from carbonization of chitosan/[math][math] gel-like composite. The specific surface area and pore volume of this carbon can come to 2358.9[math][math] g[math] and 1.14[math]cm3 g[math], respectively, and the active component Se with amorphous structure is uniformly encapsulated into the microporous structure to form Se/carbon composite. As Li–Se battery cathode, the composite delivers a second discharge capacity of 537.6[math]mAh g[math] at 0.2[math]C, and a discharge capacity of 517.9[math]mA h g[math] can be retained after 100 cycles. Even at a high rate of 5[math]C, the composite still reveals a stable discharge capacity of 325.2[math]mAh g[math]. The excellent electrochemical performances of Se/carbon composite may attribute to high specific surface area and hierarchical porous feature.
      Citation: Functional Materials Letters
      PubDate: 2016-10-19T10:09:48Z
      DOI: 10.1142/S1793604716500740
       
  • Alumina coated nano silicon synthesized by aluminothermic reduction as
           anodes for lithium ion batteries
    • Authors: Kaiqi Xu, Zhizhen Zhang, Wei Su, Zengfu Wei, Guobin Zhong, Chao Wang, Xuejie Huang
      Abstract: Functional Materials Letters, Ahead of Print.
      Alumina (Al2O[math] coated nano silicon was synthesized by aluminothermic reduction for the first time. It was realized by preoxidation of the nano silicon followed by a aluminothermic reduction that transformed the surface silicon oxide into Al2O3. The thickness of Al2O3 can be controlled by regulating the preoxidized temperature and the processing time. The nano silicon coated with 2–4[math]nm Al2O3 showed a more stable cycling performance and a higher coulombic efficiency than the uncoated nano silicon. It is believed that the improved electrochemical performance was benefited from the Al2O3 coating, which could hinder the side chemical reactions during the cycling process. This work provides an alternative method for surface coating on nanomaterials by safe and flexible solid state chemical reaction.
      Citation: Functional Materials Letters
      PubDate: 2016-10-14T11:39:16Z
      DOI: 10.1142/S1793604716500739
       
  • Novel ruptured Sm2O3–In2O3 porous nanotubes with excellent
           formaldehyde sensing properties
    • Authors: Xuesong Wang, Guoguang Wang, Xin Guo, Lianyuan Wang, Li Liu, Yu Li, Han Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      Ruptured Sm2O3–In2O3 nanotubes with pores on surface have been successfully synthesized via a single-capillary electrospinning process. The cracks and pores distributed on the nanotube surfaces which can be seen in SEM images facilitate gas transport in materials and increase effective contact areas between gas molecules and materials. Gas sensors based on Sm2O3–In2O3 have been fabricated and investigated for formaldehyde detection. The response to 100[math]ppm formaldehyde at the optimum operating temperature of 240[math]C is 66.82.
      Citation: Functional Materials Letters
      PubDate: 2016-10-04T09:04:06Z
      DOI: 10.1142/S1793604716500727
       
  • Characterization of NiTi superelastic properties by nano-dynamic modulus
           analysis and nanoindentation
    • Authors: Meni Kabla, Doron Shilo
      Abstract: Functional Materials Letters, Ahead of Print.
      Nano-dynamic modulus analysis (DMA) is a technique that allows measuring the reduced modulus during nanoindentation. This paper demonstrates the usefulness of nano-DMA in the characterization of superelastic properties of shape memory alloys. Measurements of reduced modulus as a function of the indentation depth reveal a transition, which is associated with the finish of the martensitic transformation at the region right beneath the tip. Further analysis of nanoindentation data at the transition indentation depth allows the evaluation of representative properties which are proportional to the transformation stress and the strain at the end of the martensitic transformation and can be used for comparing between different samples.
      Citation: Functional Materials Letters
      PubDate: 2016-09-23T08:28:25Z
      DOI: 10.1142/S1793604716500715
       
  • Preparation of molecularly imprinted adsorbents and NO adsorption property
    • Authors: Yi Zhao, Han Wang, Tianhao Wang
      Abstract: Functional Materials Letters, Ahead of Print.
      Two groups of molecularly imprinted NO adsorbents were prepared by molecularly self-assembly procedures, in which methanoic acid, acetic acid, ethanedioic acid were used as templates; acrylic acid (AA) and acryl amide (AAM) were used as functional monomers, respectively. The pore size distribution and the special surface area of the adsorbents varied with different functional monomers and templates regularly. NO adsorption capacities all decreased with the increasingly molecular diameter of templates, and when the template was the same, the adsorbents in group 1 had better NO adsorption capacities than those in group 2 due to the stronger hydrogen bond interaction between the functional monomer and NO molecule. The adsorption stability was also tested and both of MIPa1 in group 1 and MIPb1 in group 2 could maintain steady adsorption capacity during 50 times of adsorption–desorption cycle.
      Citation: Functional Materials Letters
      PubDate: 2016-09-02T02:18:44Z
      DOI: 10.1142/S1793604716500703
       
 
 
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