高等学校化学学报

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (11): 2288.

• 研究快报 • 上一篇    下一篇

水/正己烷界面上超声波介导组装金纳米粒子薄膜用作SERS基底

马娟1, 卢军军1, 芦玲慧1, 胡家文1, 潘建高1, 徐蔚青2   

  1. 1. 湖南大学化学生物传感与计量学国家重点实验室, 生物医学工程中心, 化学化工学院, 长沙 410082;
    2. 吉林大学超分子结构与材料国家重点实验室, 长春 130012
  • 收稿日期:2009-07-15 出版日期:2009-11-10 发布日期:2009-11-10
  • 通讯作者: 胡家文, 男, 博士, 副教授, 主要从事谱学电化学和纳米材料的研究. E-mail: jwhu@hnu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20603008, 20873037, J0830415)、湖南省自然科学基金(批准号: 06JJ3006)和超分子结构与材料国家重点实验室(吉林大学)开放基金(批准号: SKLSSM200902)资助.

Sonication-mediated Film Assembly of Gold Nanoparticles at a Water/Hexane Interface Used as a SERS Substrate

MA Juan1, LU Jun-Jun1, LU Ling-Hui1, HU Jia-Wen1*, PAN Jian-Gao1, XU Wei-Qing2   

  1. 1. State Key Laboratory for Chemo/Biosensing and Chemometrics, Biomedical Engineering Center, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
    2. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China
  • Received:2009-07-15 Online:2009-11-10 Published:2009-11-10
  • Contact: HU Jia-Wen. E-mail: jwhu@hnu.cn
  • Supported by:

    国家自然科学基金(批准号: 20603008, 20873037, J0830415)、湖南省自然科学基金(批准号: 06JJ3006)和超分子结构与材料国家重点实验室(吉林大学)开放基金(批准号: SKLSSM200902)资助.

PDF (PC)

被引次数

24

摘要：

本文以高能量的超声波作用于溶胶/疏水溶剂两相体系, 使溶胶相中的纳米颗粒先被加速吸附到乳液油滴的小表面. 随着乳液油滴向上转移, 在界面处破乳, 纳米颗粒就被释放到水/油界面上来, 形成自组装纳米薄膜. 尽管这种组装机制尚不完全清楚(如超声波是否确实如预期那样可以提高纳米粒子的动能), 但这种方法不需要预先对纳米粒子表面疏水修饰, 也不需向体系中添加表面活性有机小分子或电解质等诱导剂, 可快速有效制备表面“洁净”的纳米粒子薄膜, 并可用作高活性SERS基底.

关键词: 表面增强拉曼散射; 超声波; 金纳米粒子; 自组装; 液/液界面

Abstract:

We reported sonication-mediated film assembly of gold nanoparticles at a water/hexane interface used as a surface-enhanced Raman scattering(SERS) substrate. Gold colloids/hexane biphasic system was emulsified by sonication, and then the emulsions were left undisturbed to allow natural breaking emulsions. In the end, gold nanoparticle films were formed at the interface. The interfacial nanoparticle films can be easily transferred onto a Cu grid and Si wafer for transmission electron microscopy(TEM) and SERS characterizations, respectively. TEM image shows that the as-formed gold nanoparticle films are of a monolayer structure without notable aggregates. SERS measurements indicate that when the gold nanoparticle films were used as SERS substrates to detect 4-MPY, the detection limit can be reached to 1×10-8 mol/L.

Key words: Surface-enhanced Raman scattering; Sonication; Gold nanoparticle; Self-assembly; Liquid/liquid interface

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