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Mechanisms of (NH4)2Sx-treated III-V compound triple-junction solar cells incorporating with hybrid electrode

Chun‐Yen Tseng、Ching-Ting Lee2012-07-16Applied Physics Letters

A hybrid electrode composed of the metal contact pads and the transparent indium-tin-oxide film was incorporated with the (NH4)2Sx-treated InGaP/InGaAs/Ge triple-junction solar cells. The hybrid electrode structure was used to reduce the metal shadow area. The passivation function enabled by the (NH4)2Sx surface treat…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Filmssolar cell performance optimization

Improving Surface Plasmon Detection in Gold Nanostructures Using a Multi‐Polarization Spectral Integration Method

Kuang‐Li Lee、Min‐Jian Chih、Xu Shi 等 6 位作者2012-07-16Advanced Materials

A multi-polarization spectral integration method to increase the refractive index detection limit of gold nanostructures is presented. For a dual-period nanogrid structure, the proposed method increased signal-to-noise ratio and refractive index detection limit about 8 times larger than the simple intensity method. Th…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchPhotonic and Optical Devices

Identification of Potential Small Molecule Binding Pockets on Rho Family GTPases

Juan Manuel Ortiz‐Sánchez、Sara E. Nichols、Jacqueline Sayyah 等 6 位作者2012-07-16PLoS ONE

Rho GTPases are conformational switches that control a wide variety of signaling pathways critical for eukaryotic cell development and proliferation. They represent attractive targets for drug design as their aberrant function and deregulated activity is associated with many human diseases including cancer. Extensive…

Protein Kinase Regulation and GTPase SignalingComputational Drug Discovery MethodsEnzyme Structure and Function

Cellular reactions toward nanostructured silicon surfaces created by laser ablation

Katrin Wallat、D. Dörr、R. Le Harzic 等 9 位作者2012-07-16Journal of Laser Applications

Silicon wafers were structured with a femtosecond laser on the cm2 scale with high spatial frequency laser-induced periodic surface structures. These areas are characterized by regular parallel ripples with a period of the order of 100 nm. The particular ripple spacing is determined by the illumination wavelength of t…

Laser Material Processing TechniquesSilicon Nanostructures and PhotoluminescenceLaser-Ablation Synthesis of Nanoparticles

Enhanced magnetic anisotropy of Ni nanowire arrays fabricated on nano-structured silicon templates

Petra Granitzer、Klemens Rumpf、Toshiyuki Ohta 等 6 位作者2012-07-16Applied Physics Letters

The magnetic function of a Ni-nanowire/silicon-template system has been explored in corporation with an advanced process. Arrays of nanopores with a mean diameter of 35 nm have been fabricated by anodization of silicon wafers under an external magnetic field (8 T) perpendicular to the substrate. Due to a guided supply…

Nanowire Synthesis and ApplicationsSemiconductor materials and interfacesAnodic Oxide Films and Nanostructures

Solubility of Vitamin D3 in Six Organic Solvents at Temperatures from (248.2 to 273.2) K

Ruisi Liang、Zongbi Bao、Baogen Su 等 5 位作者2012-07-16Journal of Chemical & Engineering Data

The solubility of Vitamin D 3 in methanol, ethanenitrile, ethyl ethanoate, ethanol, propan-2-one, and propan-1-ol was measured in the temperature range from (248.2 to 273.2) K by the static equilibrium method. The results revealed that the solubility of Vitamin D 3 in solvents was observed to decrease in the order of…

Phase Equilibria and ThermodynamicsAnalytical Chemistry and ChromatographyCrystallization and Solubility Studies

Monte Carlo simulation of a compact microbeam radiotherapy system based on carbon nanotube field emission technology

Eric C. Schreiber、S Chang2012-07-16Medical Physics

PURPOSE: Microbeam radiation therapy (MRT) is an experimental radiotherapy technique that has shown potent antitumor effects with minimal damage to normal tissue in animal studies. This unique form of radiation is currently only produced in a few large synchrotron accelerator research facilities in the world. To promo…

Carbon Nanotubes in CompositesAdvanced Radiotherapy TechniquesRadiation Therapy and Dosimetry

Eshelby Twist and Magic Helical Zinc Oxide Nanowires and Nanotubes

Evgeniya Akatyeva、Traian Dumitrică2012-07-16Physical Review Letters

Twisted zinc oxide nanowires and nanotubes were recently synthesized by screw-dislocation growth. We show theoretically that once their diameter increases above a critical size of the order of a few atomic spacings, the existence of these structures can be rationalized in terms of the energetics of surfaces and verita…

ZnO doping and propertiesNanowire Synthesis and ApplicationsAdvanced Materials and Mechanics

Type-II GaSb/GaAs coupled quantum rings: Room-temperature luminescence enhancement and recombination lifetime elongation for device applications

Wei-Hsun Lin、Kai-Wei Wang、Shu‐Wei Chang 等 5 位作者2012-07-16Applied Physics Letters

Type-II GaSb/GaAs coupled quantum rings have exhibited two-order-of-magnitude luminescence enhancement and ten-times elongation of recombination lifetime at room temperature as compared with regular rings. The longer lifetime suggests that a significant amount of electrons are confined in coupled rings rather than sim…

Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesAdvanced Semiconductor Detectors and Materials

Ferromagnetic ordering in CeIr 2 B 2 : Transport, magnetization, specific heat, and NMR studies

Akhilesh Prasad、V. K. Anand、U. B. Paramanik 等 8 位作者2012-07-16Physical Review B

We present a complete characterization of the ferromagnetic system CeIr${}_{2}$B${}_{2}$ using powder x-ray diffraction (XRD), magnetic susceptibility $\ensuremath{\chi}(T)$, isothermal magnetization $M(H)$, specific heat $C(T)$, electrical resistivity $\ensuremath{\rho}(T,H)$, and thermoelectric power $S(T)$ measurem…

Rare-earth and actinide compoundsAdvanced Condensed Matter PhysicsIron-based superconductors research

Synthesis of five and six‐membered cyclic glycerilic carbonates bearing exocyclic urethane functions

Bassam Nohra、Laure Candy、Jean‐François Blanco 等 5 位作者2012-07-16European Journal of Lipid Science and Technology

Abstract Five (5CGC) and six (6CGC) membered cyclic glycerilic carbonates having exocyclic urethane functions, as potential monomers for polyurethanes and polycarbonates, were prepared by two different routes: “two‐steps” and the “one‐pot” synthesis. For the “two‐steps” route, based on the consecutive aminolysis and t…

biodegradable polymer synthesis and propertiesCatalysis for Biomass ConversionCarbon dioxide utilization in catalysis

Combustion characteristics of cellulosic loose fibres

Özgür Ceylan、Jenny Alongi、Lieve Van Landuyt 等 5 位作者2012-07-16Fire and Materials

SUMMARY The aim of this paper is to study the combustion characteristics of loose fibrous cellulosic compounds through cone calorimeter measurements. The challenge in studying loose fibrous materials by cone calorimeter in a reproducible manner is met by optimizing various process parameters such as sample weight, hea…

Fire dynamics and safety researchFlame retardant materials and propertiesEnvironmental and Industrial Safety

Finite-Size Scaling Approach for Critical Wetting: Rationalization in Terms of a Bulk Transition with an Order Parameter Exponent Equal to Zero

Ezequiel V. Albano、Kurt Binder2012-07-16Physical Review Letters

Clarification of critical wetting with short-range forces by simulations has been hampered by the lack of accurate methods to locate where the transition occurs. We solve this problem by developing an anisotropic finite-size scaling approach and show that then the wetting transition is a "bulk" critical phenomenon wit…

Material Dynamics and PropertiesTheoretical and Computational PhysicsStochastic processes and statistical mechanics

Post-growth surface smoothing of thin films of diindenoperylene

Alexander Hinderhofer、Takuya Hosokai、Koichi Yonezawa 等 11 位作者2012-07-16Applied Physics Letters

We applied in situ x-ray reflectivity and ultraviolet photoelectron spectroscopy to study the impact of annealing on low temperature (200 K) deposited organic thin films of diindenoperylene (DIP) on SiO2 and indium tin oxide (ITO). At 200 K, DIP is crystalline on SiO2 and amorphous on ITO. Upon heating to room tempera…

Organic Electronics and PhotovoltaicsTransition Metal Oxide NanomaterialsPhase-change materials and chalcogenides

In vitro proliferation and differentiation of adipose-derived stem cells isolated using anti-CD105 magnetic beads

Xiaojie Lv、Guangdong Zhou、Yang Liu 等 7 位作者2012-07-16International Journal of Molecular Medicine

The present study aimed to investigate the feasibility of isolating adipose-derived stem cells (ADSCs) by selecting cells that express the surface receptor CD105. Surface antigen expression of the unsorted cells was undertaken using FACS analysis. Primary adipose-derived cells were isolated. The second passage cells w…

Mesenchymal stem cell researchElectrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative Medicine

Quantitative Characterization of Nanoparticles in Blood by Transmission Electron Microscopy with a Window-Type Microchip Nanopipet

Lin‐Ai Tai、Yu-Ting Kang、Yu‐Ching Chen 等 15 位作者2012-07-16Analytical Chemistry

Transmission electron microscopy (TEM) is a unique and powerful tool for observation of nanoparticles. However, due to the uneven spatial distribution of particles conventionally dried on copper grids, TEM is rarely employed to evaluate the spatial distribution of nanoparticles in aqueous solutions. Here, we present a…

Gold and Silver Nanoparticles Synthesis and ApplicationsMicrofluidic and Bio-sensing TechnologiesNanopore and Nanochannel Transport Studies

Ab Initio Studies of Ag–S Bond Formation during the Adsorption of l -Cysteine on Ag(111)

Noelia Luque、Elizabeth Santos2012-07-16Langmuir

Ab initio studies of Ag-S bond formation during the adsorption of L-cysteine on Ag(111) have been performed by combining density functional theory with a quantum mechanical model developed in our group. The adsorbate-silver bond formation has been investigated by analyzing the projected density of states onto the diff…

Quantum Dots Synthesis And PropertiesMolecular Junctions and NanostructuresSurface Chemistry and Catalysis

Preparation, characterization, cellular uptake and evaluationin vivoof solid lipid nanoparticles loaded with cucurbitacin B

Haiyang Hu、Dan Liu、Xiuli Zhao 等 5 位作者2012-07-16Drug Development and Industrial Pharmacy

In this work, solid lipid nanoparticles loaded with cucurbitacin B (Cu B-SLNs) were prepared. It was found that the concentration of poloxamer 188 and soybean lecithin had effects on the mean particle size and size distribution. The zeta potentials were around -33 mV. In vitro release studies showed a sustained releas…

Nanoparticle-Based Drug DeliveryLipid Membrane Structure and BehaviorRNA Interference and Gene Delivery

Micro‐Segregation Behavior of Solute Elements in the Mushy Zone of Continuous Casting Wide‐Thick Slab

Weiling Wang、Miaoyong Zhu、Zhaozhen Cai 等 5 位作者2012-07-16steel research international

Abstract Based on the assumption that the transverse cross‐section of dendrites is a regular hexagon, a coupled macro‐heat transfer and solute diffusion model was developed to describe micro‐segregation behavior of solute elements in the mushy zone during wide‐thick slab continuous casting. The heat transfer model and…

Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMetallurgical Processes and Thermodynamics

Experimental assessment of nonergodicity in tetracene single crystals

G. B. Parravicini、Marcello Campione、F. Marabelli 等 5 位作者2012-07-16Physical Review B

Dielectric spectroscopy is applied to the study of phase transitions in the range from room temperature down to 12 K in single crystals of tetracene (TEN), a well-known material which, like most organic semiconductors, shows polymorphism. The present analysis, through proper experimental procedures, permits us to iden…

Force Microscopy Techniques and ApplicationsNonlinear Optical Materials ResearchMechanical and Optical Resonators