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A novel porous substrate for the growth of high quality GaN crystals by HVPE

Yuanbin Dai、Yongzhong Wu、Lei Zhang 等 9 位作者2014-01-01RSC Advances

This manuscript describes a high temperature annealing process to prepare a porous substrate. The substrate was used for the growth of GaN by using HVPE method to provide reduced residual stress and low defect density.

GaN-based semiconductor devices and materialsSemiconductor materials and devicesGa2O3 and related materials

Boron speciation in acid digests of metallurgical grade silicon reveals problem for accurate boron quantification by inductively coupled plasma – optical emission spectroscopy

Patrick Galler、Andrea Raab、Sabine Freitag 等 5 位作者2014-01-01Journal of Analytical Atomic Spectrometry

A sample preparation protocol for accurate B quantification in metallurgical grade Si by ICP-OES is described and validated against PGAA.

X-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis

Activated Carbons Derived from Livestock Sewage Sludge and their Absorption Ability for the Livestock Sewage

Liqian Wu、Xiaohong Zhang、Liu Dewen 等 5 位作者2014-01-01IERI Procedia

An improved method, microwave heating with direct chemical activation, was applied to prepare activated carbons from livestock sewage sludge (LCA) in the work. Preparation parameters’ influences on iodine adsorption capacity and yield rate of the product were explored. It is found that the activated carbon activated b…

Adsorption and biosorption for pollutant removalBoron and Carbon Nanomaterials ResearchCovalent Organic Framework Applications

Relativistic effects on the 125 Te and 33 S NMR chemical shifts of various tellurium and sulfur species, together with 77 Se of selenium congeners, in the framework of a zeroth-order regular approximation: applicability to tellurium compounds

Satoko Hayashi、Kohei Matsuiwa、Warô Nakanishi2014-01-01RSC Advances

The relativistic effects on σ (Te), σ (Se), and σ (S) were evaluated separately by scalar and spin–orbit terms for various species containing Te, Se, and S nuclei. The applicability of σ t (Te) Rlt-so to analyze δ (Te) obsd and the trend in the nuclei are discussed.

Advanced Chemical Physics StudiesAdvanced NMR Techniques and ApplicationsSolid-state spectroscopy and crystallography

Self-assembled hierarchical mesoporous TiO2–C sub-microspheres from nanorods and their improved properties for lithium storage

Zhimin Ren、Xinxin Fu、Chao Chen 等 7 位作者2014-01-01RSC Advances

Hierarchical TiO2 sub-microspheres (SMSs) constructed from anatase TiO2 nanorods (NRs) are prepared by a simple bottom-up self-assembly approach. The assembly process is achieved by dissolving the oleic acid-coated NRs into cyclohexane solution and refluxing at 80 °C without any other surfactants or complex steps. The…

Advancements in Battery MaterialsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies

Finite Element Modeling of Continuous Flow Tubular Electrochemical Reactor for Industrial and Domestic Wastewater Treatment

Bahadır K. Körbahti2014-01-01Journal of The Electrochemical Society

Continuous flow tubular electrochemical reactor (CTER) was simulated by finite element method (FEM) for industrial and domestic wastewater treatment in this study. CTER was operated at response surface optimized conditions and the reaction kinetics was determined by the method of initial rates. Continuous flow tubular…

Advanced oxidation water treatmentCorrosion Behavior and InhibitionMembrane-based Ion Separation Techniques

Antibacterial effect of self-etching adhesive systems onStreptococcus mutans

Seung-Ryong Kim、Dong-Hoon Shin2014-01-01Restorative Dentistry & Endodontics

OBJECTIVES: In this study, we evaluated the antibacterial activity of self-etching adhesive systems against Streptococcus mutans using the agar diffusion method. MATERIALS AND METHODS: Three 2-step systems, Clearfil SE Bond (SE, Kuraray), Contax (CT, DMG), and Unifil Bond (UnB, GC), and three 1-step systems, Easy Bond…

Dental materials and restorationsPolymer Surface Interaction StudiesAntimicrobial agents and applications

Multiband Sector Antenna with the Same Beamwidth Employing Multiple Woodpile Metamaterial Reflectors

Hideya So、Atsuya Ando、Tomohiro Seki 等 5 位作者2014-01-01IEICE Transactions on Electronics

This paper proposes a sector base station antenna for mobile wireless communication systems employing multiple woodpile metamaterial reflectors and a multiband radiator that establishes the same beamwidth in the horizontal plane for more than two frequency bands. Electromagnetic Band Gap (EBG) characteristics of each…

Antenna Design and AnalysisMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface Technologies

Surface modified BaTiO3-polystyrene nanocomposites for energy storage

Venkata Sreenivas Puli、Ravinder Elupula、Brian C. Riggs 等 6 位作者2014-01-01International Journal of Nanotechnology

Major research efforts have been focused towards developing high dielectric constant ( ε ), low loss (tan δ ) and high electrical breakdown dielectrics for energy storage capacitors. Combining the low cost, ease of processing and high breakdown field strength (BDS) of polymers with the high ε ceramic fillers will resu…

Ferroelectric and Piezoelectric MaterialsAdvanced Sensor and Energy Harvesting MaterialsDielectric materials and actuators

Linear Thermal Expansion Coefficients of Higher Manganese Silicide Compounds

Ali Allam、Pascal Boulet、Marie‐Christine Record2014-01-01Physics Procedia

The linear thermal expansion coefficients αL of the higher manganese silicide compounds are calculated using a combined approach involving Density-Functional Theory calculations, an empirical relation and experimental data. Since it has been reported that the linear thermal expansion coefficient and the cohesive energ…

Intermetallics and Advanced Alloy PropertiesSemiconductor materials and interfacesMetallurgical and Alloy Processes

Gigacycle Fatigue Properties of Double-Melted SCM440 Steel and Size Effects

Yoshiyuki Furuya2014-01-01ISIJ International

Gigacycle fatigue tests were conducted on double-melted SCM440 low-alloy steel using larger and conventional specimens and comparing the results with those of single-melted steel. Although all specimens experienced internal fractures, size effects were minor in the double-melted steel, unlike in the single-melted stee…

Microstructure and Mechanical Properties of SteelsFatigue and fracture mechanicsHydrogen embrittlement and corrosion behaviors in metals

Theoretical study of small sodium–potassium alloy clusters through genetic algorithm and quantum chemical calculations

Mateus X. Silva、Breno R. L. Galvão、Jadson C. Belchior2014-01-01Physical Chemistry Chemical Physics

Genetic algorithm is employed to survey an empirical potential energy surface for small Na(x)K(y) clusters with x + y ≤ 15, providing initial conditions for electronic structure methods. The minima of such empirical potential are assessed and corrected using high level ab initio methods such as CCSD(T), CR-CCSD(T)-L a…

Advanced Chemical Physics StudiesMachine Learning in Materials ScienceSurface and Thin Film Phenomena

Ultrathin Anode Buffer Layer for Enhancing Performance of Polymer Solar Cells

Dun Wang、Jian Wang、Lingliang Li 等 8 位作者2014-01-01International Journal of Photoenergy

A series of polymer solar cells (PSCs) based on poly[(4,8-bis-(2-ethylhexyloxy)-benzo[1,2-b:4,5-b′(dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl)-thieno[3,4-b]thiophene)-2,6-diyl] (PBDTTT-C) and [6,6]phenyl-C71-butyric acid methyl ester (PC71BM) were fabricated with various anode buffer layers. The power conversion ef…

Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications

Fully printable transparent monolithic solid-state dye-sensitized solar cell with mesoscopic indium tin oxide counter electrode

Ying Yang、Kwangho Ri、Yaoguang Rong 等 8 位作者2014-01-01Physical Chemistry Chemical Physics

We present a new transparent monolithic mesoscopic solid-state dye-sensitized solar cell based on trilamellar films of mesoscopic TiO2 nanocrystalline photoanode, a ZrO2 insulating layer and an indium tin oxide counter electrode (ITO-CE), which were screen-printed layer by layer on a single substrate. When the thickne…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesQuantum Dots Synthesis And Properties

Low-Stress Creep Deformation in Long-Term Aged Ferritic Heat-Resistant Steel

Shigeto Yamasaki、Masatoshi Mitsuhara、Ken‐ichi Ikeda 等 5 位作者2014-01-01MATERIALS TRANSACTIONS

The transition of the creep deformation mechanism in the low-stress region of Grade P92 high Cr ferritic heat-resistant steel was investigated by a helicoid spring creep test. Specifically, the effect of variation in the microstructure of steel on creep deformation behavior was evaluated by subjecting samples to therm…

Microstructure and Mechanical Properties of SteelsHigh Temperature Alloys and CreepMetal Alloys Wear and Properties

Prediction of DP600 Flow Surfaces at Various Strain-rates Using Yld2004-18p Yield Function

Amir Hassannejadasl、Taamjeed Rahmaan、Daniel E. Green 等 5 位作者2014-01-01Procedia Engineering

Due to an increasing usage of dual phase (DP) steels in the automotive industry, it is necessary to fully investigate the mechanical response of DP steels during sheet forming processes or crash events. In this work, the mechanical response of DP600 obtained at different strain rates was used to calibrate the Yld2004-…

Metal Forming Simulation TechniquesMetallurgy and Material FormingHigh-Velocity Impact and Material Behavior

Remarkable Charge-Discharge Mechanism for a Large Capacity in Fe-Containing Li2MnO3Cathodes

Ryota Yuge、Akio Toda、Sadanori Kuroshima 等 7 位作者2014-01-01Journal of The Electrochemical Society

Remarkable Charge-Discharge Mechanism for a Large Capacity in Fe-Containing Li2MnO3 Cathodes, Yuge, Ryota, Toda, Akio, Kuroshima, Sadanori, Sato, Hideyuki, Miyazaki, Takashi, Tabuchi, Mitsuharu, Nakahara, Kentaro

Advancements in Battery MaterialsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies

Measurement of Birefringence and Dichroism in Magnetic Fluid Doped with Silica Microsphere

Jing-Fung Lin、Jer‐Jia Sheu、Meng-Zhe Lee2014-01-01IEEE Transactions on Magnetics

We used the Stokes polarimeter for measuring the magnetically linear birefringence and dichroism in composite magnetic fluids (CMFs). CMFs were prepared by doping nonmagnetic microspheres into pure magnetite ( Fe3O4) MFs. Experimental results show pure Fe3O4MFs of different volume particle concentrations and CMFs dope…

Liquid Crystal Research AdvancementsGeomagnetism and Paleomagnetism StudiesCharacterization and Applications of Magnetic Nanoparticles