The Experts below are selected from a list of 3075 Experts worldwide ranked by ideXlab platform
Bing Jiang - One of the best experts on this subject based on the ideXlab platform.
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one step synthesis of lightly doped porous silicon Nanowires in hf agno3 h2o2 solution at room temperature
Journal of Solid State Chemistry, 2012Co-Authors: Fan Bai, Dandan Song, Bing JiangAbstract:One-step synthesis of lightly doped porous silicon Nanowire arrays was achieved by etching the silicon wafer in HF/AgNO3/H2O2 solution at room temperature. The lightly doped porous silicon Nanowires (pNWs) have circular nanopores on the sidewall, which can emit strong green fluorescence. The surface morphologies of these Nanowires could be controlled by simply adjusting the concentration of H2O2, which influences the distribution of silver nanoparticles (Ag NPs) along the Nanowire Axis. A mechanism based on Ag NPs-induced lateral etching of Nanowires was proposed to explain the formation of pNWs. The controllable and widely applicable synthesis of pNWs will open their potential application to nanoscale photoluminescence devices.
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One-step synthesis of lightly doped porous silicon Nanowires in HF/AgNO3/H2O2 solution at room temperature
Journal of Solid State Chemistry, 2012Co-Authors: Fan Bai, Dandan Song, Bing JiangAbstract:One-step synthesis of lightly doped porous silicon Nanowire arrays was achieved by etching the silicon wafer in HF/AgNO3/H2O2 solution at room temperature. The lightly doped porous silicon Nanowires (pNWs) have circular nanopores on the sidewall, which can emit strong green fluorescence. The surface morphologies of these Nanowires could be controlled by simply adjusting the concentration of H2O2, which influences the distribution of silver nanoparticles (Ag NPs) along the Nanowire Axis. A mechanism based on Ag NPs-induced lateral etching of Nanowires was proposed to explain the formation of pNWs. The controllable and widely applicable synthesis of pNWs will open their potential application to nanoscale photoluminescence devices.
Fan Bai - One of the best experts on this subject based on the ideXlab platform.
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one step synthesis of lightly doped porous silicon Nanowires in hf agno3 h2o2 solution at room temperature
Journal of Solid State Chemistry, 2012Co-Authors: Fan Bai, Dandan Song, Bing JiangAbstract:One-step synthesis of lightly doped porous silicon Nanowire arrays was achieved by etching the silicon wafer in HF/AgNO3/H2O2 solution at room temperature. The lightly doped porous silicon Nanowires (pNWs) have circular nanopores on the sidewall, which can emit strong green fluorescence. The surface morphologies of these Nanowires could be controlled by simply adjusting the concentration of H2O2, which influences the distribution of silver nanoparticles (Ag NPs) along the Nanowire Axis. A mechanism based on Ag NPs-induced lateral etching of Nanowires was proposed to explain the formation of pNWs. The controllable and widely applicable synthesis of pNWs will open their potential application to nanoscale photoluminescence devices.
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One-step synthesis of lightly doped porous silicon Nanowires in HF/AgNO3/H2O2 solution at room temperature
Journal of Solid State Chemistry, 2012Co-Authors: Fan Bai, Dandan Song, Bing JiangAbstract:One-step synthesis of lightly doped porous silicon Nanowire arrays was achieved by etching the silicon wafer in HF/AgNO3/H2O2 solution at room temperature. The lightly doped porous silicon Nanowires (pNWs) have circular nanopores on the sidewall, which can emit strong green fluorescence. The surface morphologies of these Nanowires could be controlled by simply adjusting the concentration of H2O2, which influences the distribution of silver nanoparticles (Ag NPs) along the Nanowire Axis. A mechanism based on Ag NPs-induced lateral etching of Nanowires was proposed to explain the formation of pNWs. The controllable and widely applicable synthesis of pNWs will open their potential application to nanoscale photoluminescence devices.
Huajian Gao - One of the best experts on this subject based on the ideXlab platform.
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Influence of microstructures on mechanical behaviours of SiC Nanowires: a molecular dynamics study
Nanotechnology, 2011Co-Authors: Jun Wang, Qi Wang, Pan Xiao, Yilong Bai, Yaogen Shen, Xiaozhou Liao, Huajian GaoAbstract:The tensile behaviours of [111]-oriented SiC Nanowires with various microstructures are investigated by using molecular dynamics simulations. The results revealed the influence of microstructures on the brittleness and plasticity of SiC Nanowires. Plastic deformation is mainly induced by the anti-parallel sliding of 3C grains along an intergranular amorphous film parallel to the plane and inclined at an angle of 19.47° with respect to the Nanowire Axis. Our study suggests that the wide dispersion of mechanical properties of SiC Nanowires observed in experiments might be attributed to their diverse microstructures.
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Understanding large plastic deformation of SiC Nanowires at room temperature
EPL (Europhysics Letters), 2011Co-Authors: Jun Wang, Yilong Bai, Yaogen Shen, Xiaozhou Liao, Qing Yun Wang, Peng Xiao, Huajian GaoAbstract:Tensile behaviors of SiC [111] Nanowires with various possible microstructures have been investigated by molecular-dynamics simulations. The results show that the large plastic deformation in these Nanowires is induced by the anti-parallel sliding of 3C grains along an ultrathin intergranular amorphous film parallel to the (11 (1) over bar) plane and inclined at an angle of 19.47 degrees. with respect to the Nanowire Axis. The resulting large plastic deformation of SiC Nanowires at room temperature is attributed to the stretching, breaking and re-forming of Si-C bonds in the intergranular amorphous film, which is also evident from the sawtooth jumps in the stress-strain response. Copyright (C) EPLA, 2011
Young Keun Kim - One of the best experts on this subject based on the ideXlab platform.
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Magnetic Anisotropy Evolution in CoFe/Au Barcode Nanowire Arrays
IEEE Transactions on Magnetics, 2014Co-Authors: Bum Chul Park, Bong Gun Kim, Hyo Won Seo, Young Keun KimAbstract:Owing to their multifunctional properties, multisegmented metallic Nanowires have generated interest for potential applications in magnetics and biology. In this paper, we present the magnetic properties of Co50Fe50/Au barcode Nanowire arrays with CoFe and Au segments of various diameters and thicknesses. The distinct anisotropic behavior and magnetization reversal process depending upon these geometric factors were investigated. As the diameter increased (50-200 nm), the easy-Axis direction changed from parallel (//) to perpendicular (⊥) to the Nanowire Axis. As the intersegment spacing increased (tAu = 50-200 nm), the easy-Axis direction tended to lie in the plane of the Nanowires. In addition, we examined the changes in the magnetization reversal modes.
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Synthesis and Characterization of Core-Shell Nanowires
2008Co-Authors: Ju Hun Lee, Ji Sung Lee, Ki Seok Jeon, Hae Ryong Kim, Jong Heun Lee, Yung Doug Suh, Young Keun KimAbstract:We report the synthesis and characterization of core-shell Nanowires by thermal conversion of the Fe Nanowires frompulse electrodeposition in anodized aluminum oxide (AAO) nanotemplates under various conditions. Well-defined core-shell nanostruc-ture of the Nanowires was confirmed by TEM and corresponding elemental line scanning and point scanning. The type ofthe iron oxide in the shell was identified using nano-Raman spectroscopy, which exposes magnetite to be the major constituent. Themagnetic measurements demonstrate that the Nanowires are robustly soft magnetic, with the magnetization tunable by heat treatmentparameters and a weak magnetic easy direction parallel to the Nanowire Axis.
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Growth and Magnetic Properties of CoPtAu Nanowires
IEEE Transactions on Magnetics, 2008Co-Authors: Ji Hyun Min, Young Keun KimAbstract:We report the growth of CoPtAu Nanowires by electrodeposition in nanoporous anodic aluminum oxide templates. The composition analysis and elemental mapping reveals that the Nanowires are composed of Co, Pt and Au, which are homogenously distributed throughout the Nanowires. Under the given deposition conditions, the Nanowires were dominated by Pt and Au to form a cubic PtAu phase, with the existence of the CoPt tetragonal phase at higher current densities. The Nanowires obtained at 3 and 5 mA/cm2 show ferromagnetic behavior and have an easy-Axis parallel to the Nanowire Axis.
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Synthesis and Characterization of ${\rm Fe-FeO}_{\rm x}$ Core-Shell Nanowires
IEEE Transactions on Magnetics, 2008Co-Authors: Ju Hun Lee, Ji Sung Lee, Ki Seok Jeon, Hae Ryong Kim, Jong Heun Lee, Yung Doug Suh, Young Keun KimAbstract:We report the synthesis and characterization of Fe-FeOx core-shell Nanowires by thermal conversion of the Fe Nanowires from pulse electrodeposition in anodized aluminum oxide (AAO) nanotemplates under various conditions. Well-defined core-shell nanostructure of the Fe-FeOx Nanowires was confirmed by TEM and corresponding elemental line scanning and point scanning. The type of the iron oxide in the shell was identified using nano-Raman spectroscopy, which exposes magnetite to be the major constituent. The magnetic measurements demonstrate that the Nanowires are robustly soft magnetic, with the magnetization tunable by heat treatment parameters and a weak magnetic easy direction parallel to the Nanowire Axis.
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Synthesis and magnetic anisotropy of multilayered Co/Cu Nanowire array
Journal of Magnetism and Magnetic Materials, 2006Co-Authors: Jiung Cho, Qun Xian Liu, Ji Hyun Min, Young Keun KimAbstract:Abstract The Co and multilayered Co/Cu Nanowire arrays were fabricated by pulsed DC electrodeposition using anodized aluminum oxide (AAO) templates. Each Nanowire has the length of 20 μm and the diameter of 200 nm. The layer thickness of Co layer was slightly decreased even if the deposition time was fixed as Cu deposition time increased due to the metal exchange. Unlike the Co Nanowire array case, multilayered Co/Cu Nanowire array exhibited an easy magnetization direction perpendicular to the Nanowire Axis due to the separation of Co layers.
Raffaella Calarco - One of the best experts on this subject based on the ideXlab platform.
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Highly polarized Raman scattering anisotropy in single GaN Nanowires
Applied Physics Letters, 2010Co-Authors: E. O. Schäfer-nolte, Toma Stoica, T. Gotschke, F. Limbach, Eli Sutter, Peter Sutter, Raffaella CalarcoAbstract:Single GaN Nanowires and larger GaN ensembles are investigated by Raman spectroscopy. Spectra of Nanowire ensembles prove the high crystal quality and are in agreement with selection rules for the wurtzite structure. Single Nanowires are studied with a spatial resolution of the order of 400 nm for different polarization directions of the incident laser beam relative to the Nanowire Axis. In the single wire spectrum, only the A1(TO) was observed and the Raman intensity was suppressed for perpendicular polarization. These results confirm that Raman scattering in isolated GaN Nanowires is governed by size effects.
