高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

内部具有可移动金核的中空银纳米颗粒的制备、表征及其表面增强拉曼效应

李莉, 杨武, 郭昊, 陈中玉, 张爱菊, 金丽丽, 陈淼   

  1. 西北师范大学化学化工学院, 生态环境相关高分子材料教育部重点实验室, 兰州 730073
  • 收稿日期:2008-04-03 修回日期:1900-01-01 出版日期:2008-11-10 发布日期:2008-11-10
  • 通讯作者: 杨武

Preparation and Characterization of Hollow Ag Nanoparticles with Movable Au Cores Inside and Their Application to Surface-enhanced Raman Scattering

LI Li, YANG Wu*, GUO Hao, CHEN Zhong-Yu, ZHANG Ai-Ju, JIN Li-Li, CHEN Miao   

  1. Key Laboratory of Polymer Materials Related with Ecology and Environment of Ministry of Education College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
  • Received:2008-04-03 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
  • Contact: YANG Wu

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被引次数

12

摘要： 采用振荡法和种子生长技术制备出核壳结构的Au@SiO2纳米颗粒及夹层结构的Au@SiO2@Ag纳米颗粒, 用HF将Au@SiO2@Ag NPs夹层的SiO2溶解, 得到内部带有粒径为30 nm的可移动金核、壳层厚度约为30 nm的中空银纳米颗粒(Au@air@Ag NPs). 用扫描电子显微镜和透射电子显微镜对所得到的纳米微球的形貌进行了表征, 并以罗丹明B为探针分子研究了Au@air@Ag 纳米颗粒的表面增强拉曼(SERS)效应, 发现Au@air@Ag 纳米颗粒是一种可应用于SERS的理想材料.

关键词: 核壳结构, Au@air@Ag, 可移动核, 中空, 表面增强拉曼散射

Abstract: Core-shell structure of Au@SiO2 nanoparticles and silver coated Au@SiO2 nanoparticles(Au@SiO2@Ag NPs) were prepared by a seed-mediated growth technique under shaking. Hollow Ag nanoparticles with a shell thickness of 30 nm and with movable Au cores of 30 nm diameter inside(Au@air@Ag NPs) were further obtained by dissolving silica shell within Au@SiO2@Ag NPs by HF. The morphologies of those obtained nanoparticles were characterized by scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The application of the as-prepared Au@air@Ag substrates in surface-enhanced Raman scattering(SERS) was investigated with Rhodamine B as a probe molecule. It was found that even though very low concentration of Rhodamine B adsorbed on the hollow nanoparticles showed a strong SERS effect. The results indicate that the Au@air@Ag NPs were ideal materials applied in SERS.

Key words: Core-shell structure, Au@air@Ag, Movable core, Hollow, Surfaced-enhanced Raman scattering

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