| 基于Au/SiO2纳米粒子的结晶紫表面增强拉曼特性研究 |
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| 引用本文： | 张浩然,满石清.基于Au/SiO2纳米粒子的结晶紫表面增强拉曼特性研究[J].分析化学,2011,39(6):821-826. |
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| 作者姓名： | 张浩然 满石清 |
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| 作者单位： | 暨南大学电子工程系,广州,510632;暨南大学纳米化学研究所,广州,510632 |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金 |
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| 摘 要： | 采用自组装-化学镀法制备了以SiO2为核,Au为壳层的核壳结构纳米粒子(Au/SiO2),以生物染色剂结晶紫为探针分子,研究了Au/SiO2的表面增强拉曼散射(SERS)效应,并考察了Cl-对SERS增强效应的影响。实验表明,Cl-对SERS有明显的增强效果,这主要是由于Cl-的加入使得Au/SiO2发生团聚,产生大量"热点",从而使SERS增强效果进一步加强。以Au/SiO2(5×1010 mL-1)为活性基底,KCl(0.01 mol/L)为额外增强剂,在水溶液中实现了对结晶紫(CV)的痕量检出,最低检测浓度可达到5×10-10mol/L。
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| 关 键 词： | 金纳米粒子 核壳结构 表面增强拉曼光谱 热点 |
Surface-enhanced Raman Scattering Activities of Crystal Violet Based on Au/SiO_2 |
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| ZHANG Hao-Ran,MAN Shi-Qing.Surface-enhanced Raman Scattering Activities of Crystal Violet Based on Au/SiO_2[J].Chinese Journal of Analytical Chemistry,2011,39(6):821-826. |
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| Authors: | ZHANG Hao-Ran MAN Shi-Qing |
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| Institution: | ZHANG Hao-Ran1,2,MAN Shi-Qing1,2 1(Department of Electronic Engineering,Jinan University,Guangzhou 510632) 2(Institute of Nano-Chemistry,Guangzhou 510632) |
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| Abstract: | Nanoparticles Au/SiO2,consisting of a silica core with a gold shell,were prepared by a combination of molecular self-assembly and the subsequent electroless plating of gold.The surface-enhanced Raman scattering(SERS) activities of Au/SiO2 were investigated by employing biological dye,crystal violet(CV),as the probe molecule.The chloride ion effects on surface-enhanced Raman scattering(SERS) activities of Au/SiO2 were studied.It was found that chloride ion could further enhance the SERS,which mainly arose fr... |
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| Keywords: | Gold nanoparticle Core-shell Surface enhanced Raman scattering Hot spot |
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