Current Applied Physics

Items from 1 to 20 out of 41 results

article

Oxidation states of Cu in the CuO/CeO2/Al2O3 catalyst in the methanol steam reforming process

Ka-lok Chiu, Fung-luen Kwong, Dickon H.L. Ng

Current Applied Physics > 2012 > 12 > 4 > 1195-1198

The biomorphic CuO/CeO ₂ /Al ₂ O ₃ was used as a catalyst in methanol steam reforming (SRMe), and the reaction mechanism was studied. It was found that the oxidation states of Cu in the biomorphic sample would vary with the reaction temperature and they also affected the rate of the reaction. Below 200 °C, SRMe would not occur, and the X-ray diffractometry study indicated that...

article

A novel amperometric hydrogen peroxide biosensor based on pyrrole-PAMAM dendrimer modified gold electrode

Mehmet Şenel, Emre Çevik

Current Applied Physics > 2012 > 12 > 4 > 1158-1165

Horseradish peroxidase (HRP) was immobilized into an electrochemically prepared copolymer of pyrrole–PAMAM (PAMAM; polyamidoamine) dendrimers for the construction of amperometric hydrogen peroxide biosensor. First, second, and third generation amidoamine–pyrrole dendrons having branched amine periphery and focal pyrrole functionality were synthesized via divergent pathway. Pyrrole dendrimers were...

article

Hydrogen permeation characteristics of rolled V85Al10Co5 alloys

Eric Fleury, Jin-Yoo Suh, Dong-ik Kim, Chan Hoon Jeong, more

Current Applied Physics > 2012 > 12 > 4 > 1131-1138

Thin sheets of V ₈₅ Al ₁₀ Co ₅ alloy were produced by a thermo-mechanical treatment consisting in successive hot rolling, cold rolling steps and annealing treatment at high temperature followed by either air cooling or water quenching. Though the values of hydrogen permeability measured for these sheets were significantly reduced as a consequence of the rolling process, the...

article

Carrier transport mechanism of strained AlGaN/GaN Schottky contacts

Tae-Chul Nam, Ja-Soon Jang, Tae-Yeon Seong

Current Applied Physics > 2012 > 12 > 4 > 1081-1083

Using polarization field effect-based thermionic field emission (PFE-TFE) model based on current–voltage–temperature data, possible carrier transport mechanisms for Pt/Au and Cr/Pd Schottky contacts to Al _0.25 Ga _0.75 N/GaN layers were investigated. Thermionic emission (TE) model was also investigated to compare to the PFE-TFE. It was shown that Schottky barrier heights (SBHs) are...

article

Structural and functional stabilities of artificially designed DNA ultra-thin films grown by silica Assistance

Junwye Lee, Jonghyun Koo, Si Un Hwang, Sunmin Min, more

Current Applied Physics > 2012 > 12 > 4 > 1207-1211

We report the structural and functional stabilities of artificially synthesized DNA ultra-thin films. Fully covered DNA ultra-thin films on a silica substrate were fabricated by the silica-assisted growth method and those samples were then incubated in various chemicals and physical conditions. The DNA ultra-thin films showed high maintainability under those harsh conditions and these results would...

article

Mn-doped activated carbon aerogel as electrode material for pseudo-capacitive supercapacitor: Effect of activation agent

Yoon Jae Lee, Hai Woong Park, Ung Gi Hong, In Kyu Song

Current Applied Physics > 2012 > 12 > 4 > 1074-1080

Carbon aerogel (CA) was prepared by a sol-gel polymerization of resorcinol and formaldehyde, and a series of activated carbon aerogels (ACA-X, X = H ₃ PO ₄ , K ₂ CO ₃ , KOH, and ZnCl ₂ ) were then prepared by a chemical activation using different activation agent (X represented an activation agent). Specific capacitances of activated carbon aerogels were measured...

article

Preparation and properties of nanocrystalline BNT-BTx piezoelectric ceramics by sol-gel and spark plasma sintering

Marin Cernea, Gianluca Poli, Gheorghe Virgil Aldica, Ciceron Berbecaru, more

Current Applied Physics > 2012 > 12 > 4 > 1100-1105

(Bi _0.5 Na _0.5 )TiO ₃ was doped in situ with 5, 8, and 11 mol% BaTiO ₃ (BNT-BT _x ; x = 0.05, 0.08 and 0.11) using a sol-gel technique. The resulting powders from gel precursors showed microstructures consisting of nano-sized grains and crystalline perovskite structure. Spark plasma sintering (SPS) technique was used to prepare high densified (98–99%ρ _theor...

article

Apple – biomorphic synthesis of porous ZnO nanostructures for glucose direct electrochemical biosensor

Hengameh Fatemi, Abbas Ali Khodadadi, Azam Anaraki Firooz, Yadollah Mortazavi

Current Applied Physics > 2012 > 12 > 4 > 1033-1038

Biomorphic porous ZnO nanostructures were successfully synthesized via an aqueous sol–gel soaking process using pieces of apple flesh and skin as templates and employed for glucose direct electrochemical biosensor. The structure and morphology of ZnO nanostructures were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). By modifying glassy carbon electrode with the biomorphic...

article

Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Lijuan Liu, Panli You, Guangfu Yin, Xiaoming Liao, more

Current Applied Physics > 2012 > 12 > 4 > 1045-1051

A series of Eu ²⁺ and Sm ³⁺ co-doped Li ₂ SrSiO ₄ phosphors are prepared by the high temperature solid-state reaction. The morphology, structure and spectroscopic properties of the prepared samples are characterized by scanning electron microscopy, X-ray diffraction, diffuse reflection spectra, photoluminescence spectra and electron paramagnetic resonance spectra, respectively...

article

Evaluation and optimization of SrCo0.9Ta0.1O3−δ perovskite as cathode for solid oxide fuel cells

Qingjun Zhou, Tong Wei, Yihua Shi, Songqing Guo, more

Current Applied Physics > 2012 > 12 > 4 > 1092-1095

The SrCo _0.9 Ta _0.1 O _3-δ (SCT) perovskite-type oxide is synthesized by the conventional solid state reaction method and examined as an alternative cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The electrical conductivity of SCT sample reaches 250–152 S cm ⁻¹ in the temperature range 600–800 °C. SCT exhibits good chemical compatibility with...

article

Editorial Board

Current Applied Physics > 2012 > 12 > 4 > IFC

article

Synthesis of graphene ribbons using selective chemical vapor deposition

Hyosub An, Wan-Gyu Lee, Jongwan Jung

Current Applied Physics > 2012 > 12 > 4 > 1113-1117

A new method for implementing graphene ribbons using selective graphene growth on metal-sidewall by chemical vapor deposition has been proposed. In this method, Ni catalyst is pre-patterned before chemical vapor deposition, and graphene film is selectively grown on the sidewall of the nickel for graphene ribbons. The graphene ribbons were confirmed by TEM image and Raman spectroscopy, and the fabricated...

article

A potential red-emitting phosphor with high color-purity for near-UV light emitting diodes

Zhengliang Wang, Yaling Zhang, Li Xiong, Xiaofan Li, more

Current Applied Physics > 2012 > 12 > 4 > 1084-1087

New red tungstates phosphors, Na ₅ La _1−x Ln _x (WO ₄ ) ₄ (Ln=Eu, Sm) and Na ₅ Eu _1−x Sm _x (WO ₄ ) ₄ , were prepared by solid-state reaction technique. And their structure and photo-luminescent properties were investigated. The introduction of Sm ³⁺ broadened the excitation band around 400nm of the phosphors, and...

article

Probing electric field distribution in organic double-layer diode by electric field induced optical second harmonic generation

Eunju Lim, Mitsumasa Iwamoto

Current Applied Physics > 2012 > 12 > 4 > 1023-1026

Analyzing spectroscopic optical properties of an organic double-layer diode comprised of α-NPD and Alq ₃ layers, we studied the selectively probing of electric field distribution in one of the two layers by using the microscopic electric field induced optical second harmonic generation (EFISHG) measurement. Spectroscopic SHGs from Indium–Zinc-Oxide/N,N-Di(naphthalene-1-yl)-N,N′-diphenyl-benzidine/tris(8-quinolinolato)...

article

Effects of reducing agents on the electrochemical properties of the prepared manganese oxide powders

Chung-Hsien Wu, Jeng-Shin Ma, Chung-Hsin Lu

Current Applied Physics > 2012 > 12 > 4 > 1058-1063

Manganese oxide powders with high specific capacitance were successfully fabricated via a simple redox reaction at room temperature. The reducing agents used for the redox reaction significantly affected the oxidation states and the electrochemical properties of the prepared manganese oxide powders. As C ₂ H ₅ OH was used as the reducing agent, high Mn ³⁺ content and high amount...

article

Operating modes and power considerations of microhollow cathode discharge devices with elongated trenches

E.A. Lennon, A.A. Burke, R.S. Besser

Current Applied Physics > 2012 > 12 > 4 > 1064-1073

Microhollow cathode discharge (MHCD) devices generate microplasmas with high electron densities and reactive species, making them a prospective hydrocarbon reforming technology. Here we report on the electrical phenomena resulting from MHCD devices with elongated trenches using argon at atmospheric pressure and room temperature. Devices that were 100 μm wide, 100 μm deep, and 1 cm long exhibited self-pulsing...

article

Synthesis and characterization of nickel–manganese oxide via the hydrothermal route for electrochemical capacitors

Chung-Hsien Wu, Jeng-Shin Ma, Chung-Hsin Lu

Current Applied Physics > 2012 > 12 > 4 > 1190-1194

Nano-sized and well dispersed manganese oxide and nickel–manganese oxide (Ni–Mn–O) powders are synthesized via the hydrothermal route. The addition of nickel ions significantly affects the morphology, particle size and the electrochemical properties of the obtained powders. Adding nickel ions results in a significant change in the shape of the powders from rod-like to plate-like. The electrochemical...

article

Sulfurization temperature effects on the growth of Cu2ZnSnS4 thin film

Hyesun Yoo, JunHo Kim, Lixin Zhang

Current Applied Physics > 2012 > 12 > 4 > 1052-1057

We made Cu ₂ ZnSnS ₄ (CZTS) thin films by sulfurization of Cu/Sn/Cu/Zn metallic films. Sulfurizations were carried out under different thermal annealing conditions, where maximum temperatures were 440 °C (LT-CZTS) and 550 °C (HT-CZTS). For LT-CZTS films, secondary phases such as SnS ₂ and Cu _2−x S were observed, whereas for HT-CZTS films secondary impurities were not...

article

Elastic behavior of bilayer graphene under in-plane loadings

L. Wang, Q. Zhang

Current Applied Physics > 2012 > 12 > 4 > 1173-1177

Due to its many superior properties, bilayer graphene is expected to serve as a proper candidate in various applications, and further provokes intensive research on how it deforms. Based on atomistic simulations, the elastic behavior of bilayer graphenes, including fracture under tension and buckling under compression, is investigated under in-plane loadings. The elastic property, e.g. Young's modulus...

article

Direct observation of the formation of DNA triplexes by single-molecule FRET measurements

Il Buem Lee, Ja Yil Lee, Nam-Kyung Lee, Seok-Cheol Hong

Current Applied Physics > 2012 > 12 > 4 > 1027-1032

In this report we investigated the effects of various biological and chemical factors (DNA sequence, pH, ions, and molecularity) on the formation of DNA triplexes through single-molecule FRET technique. Using this method, we determined how the third strand bound to a DNA duplex and how stable the triplex structure was under various conditions. From this study, we not only verified a variety of well-known...

Number:
4
Volume:
12
Year:
2012

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Keywords

BIOSENSOR (3)
GRAPHENE (3)
BARIUM TITANATE (2)
ELECTRICAL CONDUCTIVITY (2)
GAS SENSOR (2)
MANGANESE OXIDE (2)
PHOTOLUMINESCENCE (2)
PYRROLE (2)
1-METHYL-3-N-DECYL-IMIDAZOLIUM BROMIDE (1)
3C-SIC (1)
A-SITE DOPANT MODULATING (1)
AC IMPEDANCE SPECTROSCOPY (1)
ACTIVATED CARBON (1)
ALGAN/GAN (1)
AMORPHOUS MN OXIDE (1)
ANNEALING (1)
ANNEALING TREATMENT (1)
ANODE PROPERTIES (1)
ATOMISTIC SIMULATION (1)
ATOMIZING CORONA DISCHARGE (1)
ATOMIZING CORONA DISCHARGE WITH MAGNETIC FIELD (1)
BAND GAP (1)
BATIO3 AND TITANATES (1)
BEAM POWER DEPOSITION (1)
BEAMLINE COMPONENT HEAT LOAD (1)
BILAYER GRAPHENE (1)
BIOMORPHIC (1)
BISMUTH AND SODIUM TITANATE (1)
BRILLOUIN SCATTERING (1)
BTR CODE (1)
BUCKLING (1)
CAPACITANCE (1)
CARBON ACTIVATION (1)
CARBURIZATION (1)
CARRIER TRANSPORT (1)
CATALYST (1)
CHARGING PARTICLES (1)
COLD ROLLING (1)
COMPOSITE MATERIALS (1)
CONDUCTIVE POLYMERS (1)
COPPER OXIDATION STATES (1)
COVALENT IMMOBILIZATION (1)
CRYSTAL STRUCTURE (1)
CU2ZNSNS4 (1)
CUO/CEO2/AL2O3 (1)
CVD (1)
DEFECTS (1)
DENDRIMER (1)
DIELECTRIC AND PIEZOELECTRIC PROPERTIES (1)
DIELECTRIC PROPERTIES (1)
DIRECT (1)
DNA (1)
DNA NANOSTRUCTURE (1)
DNA TRIPLEX (1)
DOUBLE EMISSIVE LAYERS (1)
ELASTIC CONSTANT (1)
ELECTRIC DOUBLE-LAYER CAPACITOR (1)
ELECTRIC FIELD (1)
ELECTROCHEMICAL CAPACITOR (1)
ELECTROCHEMICAL PROPERTIES (1)
ELECTROCHEMISTRY (1)
ELECTROSPINNING (1)
ER3+-DOPED TIO2 (1)
ETHYLENE GLYCOL (1)
EU2+ (1)
FATIGUE (1)
FERROELECTRIC PROPERTIES (1)
FERROELECTRICS (1)
FILM GROWTH (1)
FILMS (1)
FREE VIBRATIONS (1)
FTIR SPECTROSCOPY (1)
FUEL CELL (1)
GAS-PHASE POLYMERIZATION (1)
GLUCOSE OXIDASE (1)
GRAPHENE RIBBON (1)
H-DNA (1)
HALL MOBILITY (1)
HORSERADISH PEROXIDASE (1)
HYDROCARBON REFORMING (1)
HYDROGEN PRODUCTION (1)
HYDROGEN SEPARATION (1)
HYDROTHERMAL (1)
IMMOBILIZATION (1)
IMPEDANCE SPECTROSCOPY (1)
IN SITU DECORATION (1)
IN-PLANE ELASTIC BEHAVIOR (1)
IN2O3 (1)
IONIC LIQUID (1)
KSTAR (1)
LATTICE MISMATCH (1)
LI2SRSIO4 (1)
LITHIUM TITANATE OXIDE (1)
LITHIUM ION BATTERY (1)
LONG PULSE ION SOURCE (1)
LOW ANGLE BOUNDARY (1)
MAGNETIC ENTROPY CHANGE (1)
MECHANICAL CLEAVAGE (1)
METHANOL STEAM REFORMING (1)
METHYLENE BLUE (MB) (1)
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Current Applied Physics

Oxidation states of Cu in the CuO/CeO2/Al2O3 catalyst in the methanol steam reforming process

A novel amperometric hydrogen peroxide biosensor based on pyrrole-PAMAM dendrimer modified gold electrode

Hydrogen permeation characteristics of rolled V85Al10Co5 alloys

Carrier transport mechanism of strained AlGaN/GaN Schottky contacts

Structural and functional stabilities of artificially designed DNA ultra-thin films grown by silica Assistance

Mn-doped activated carbon aerogel as electrode material for pseudo-capacitive supercapacitor: Effect of activation agent

Preparation and properties of nanocrystalline BNT-BTx piezoelectric ceramics by sol-gel and spark plasma sintering

Apple – biomorphic synthesis of porous ZnO nanostructures for glucose direct electrochemical biosensor

Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Evaluation and optimization of SrCo0.9Ta0.1O3−δ perovskite as cathode for solid oxide fuel cells

Editorial Board

Synthesis of graphene ribbons using selective chemical vapor deposition

A potential red-emitting phosphor with high color-purity for near-UV light emitting diodes

Probing electric field distribution in organic double-layer diode by electric field induced optical second harmonic generation

Effects of reducing agents on the electrochemical properties of the prepared manganese oxide powders

Operating modes and power considerations of microhollow cathode discharge devices with elongated trenches

Synthesis and characterization of nickel–manganese oxide via the hydrothermal route for electrochemical capacitors

Sulfurization temperature effects on the growth of Cu2ZnSnS4 thin film

Elastic behavior of bilayer graphene under in-plane loadings

Direct observation of the formation of DNA triplexes by single-molecule FRET measurements

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