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沈小双

作品数:6 被引量:3H指数:1
供职机构:中国科学技术大学更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金更多>>
相关领域:一般工业技术理学化学工程更多>>

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6 条 记 录,以下是 1-6
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Shape-Controlled Synthesis of Palladium Nanoparticles and Their SPR/SERS Properties
2009年
Morphological evolution of Pd nanoparticles was studied in a solution-phase synthesis using cetyltrimethylammonium bromide (CTAB) and CTAB/sodium citrate mixture as capping agents, respectively. The morphological diversity of Pd nanoparticles is the combined effect of different Pd twinned seeds formed in the nucleation stage and selectively enlarging one set of crystallographic facets in the growth stage, both of which can be affected by the concentrations of CTAB. Through changing the concentrations of CTAB and sodium ascorbate, Pd nanoparticles with different shapes were obtained. When citrate ions were introduced to manipulate the nucleation and growth process, star-shaped icosahedra and nanorods with pentagram cross-sections were obtained. Pd nanoparticles with different shapes have quite different surface plasmon resonance and surface-enhanced Raman scattering properties.
沈小双王冠中洪勋祝巍
关键词:PALLADIUMNANOPARTICLE
一种利用紫外上转换发光纳米颗粒选择性杀灭细胞的方法
本发明利用紫外上转换颗粒实现对细胞的选择性杀灭的方法,特征是使用在红外或可见光照射下能够发射紫外光的纳米颗粒--紫外上转换纳米颗粒,通过在该纳米颗粒表面连接上能够与目标细胞实现特异性结合的抗体,利用抗体与细胞表面对应抗原...
王冠中沈小双
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Synthesis of Various Metal/TiO2 Core/shell Nanorod Arrays
2011年
We present a general approach to fabricate metal/TiO2 core/shell nanorod structures by twostep electrodeposition. Firstly, TiO2 nanotubes with uniform wall thickness are prepared in anodic aluminum oxide (AAO) membranes by electrodeposition. The wall thickness of the nanotubes could be easily controlled by modulating the deposition time, and their outer diameter and length are only limited by the channel diameter and the thickness of the AAO membranes, respectively. The nanotubes' tops prepared by this method are open, while the bottoms are connected directly with the Au film at the back of the AAO membranes. Secondly, Pd, Cu, and Fe elements are filled into the TiO2 nanotubes to form core/shell structures. The core/shell nanorods prepared by this two-step process are high density and free-standing, and their length is dependent on the deposition time.
祝巍王冠中洪勋沈小双
关键词:TITANIANANOTUBEELECTRODEPOSITION
贵金属纳米颗粒的形貌控制合成、自组装与表面增强拉曼散射性质
本论文研究的是贵金属纳米颗粒的形貌控制合成、自组装及其表面增强拉曼散射(SERS)性质。正文包括五部分内容:第一章是绪论,主要是介绍贵金属纳米颗粒的液相法合成和自组装方面的一些最新进展,并简要介绍了贵金属纳米结构的光学与...
沈小双
关键词:形貌控制自组装表面增强拉曼散射一维纳米结构
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Controllable Electrochemical Synthesis of Silver Dendritic Nanostructures and Their SERS Properties被引量:1
2010年
Ag dendritic nanostructures were synthesized on fluorine-doped tin oxide covered glass sub- strates by the electrodeposition method. Results demonstrate that the size, diameter, crys- tallinity, and branch density of the Ag dendrites can be controlled by the applied potential, the surfactants and the concentration of AgNO3. Three kinds of typical silver dendrites were applied as substrates of the surface enhanced Raman scattering (SERS) and one of them was able to clearly detect rhodamine 6G concentrations up to 0.1 nmol/L. The differences of the SERS spectra at these Ag dendrites confirmed that the shapes and interparticle spacings have great effect on Raman enhancement, especially the interparticle spacings.
洪勋王冠中王颖祝巍沈小双
关键词:SILVERELECTRODEPOSITION
一步法电沉积钯铜二元金属纳米管(英文)被引量:1
2010年
由钯和铜纳米颗粒组成得二元金属纳米管通过电沉积的方法在氧化铝模板中被制备出来.金属离子的扩散和沉积过程的竞争决定了最终的产物是纳米管或者是纳米线.在较高负电位下,其生长受扩散控制,金属离子在纳米管的边缘被消耗,形成的是纳米管结构.而在较低的负电位时形成的是纳米线.在硝酸根离子的电催化实验中,相比于薄膜,纳米管的催化性能受氢气析出的影响较小.在空气中放置6个月后,二元金属纳米管被氧化成均一相的氧化物纳米管.
洪勋王冠中祝巍沈小双
关键词:纳米管电沉积氧化铝模板
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