高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 39.

• Analytical Sciences • 上一篇    下一篇

Assembly of Multilayered Films on Core Substrate:Preparation and Characterization

YANG Wen-Jun1, HUANG Qun-Jian1, LI Xiao-Yuan1, YU Nai-Teng1, CARUSO2, Frank2   

  1. 1. Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong;
    2. Max-Plank-Institute of Colloids and Interfaces, Potsdam, Germany
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 通讯作者: LI Xiao-Yuan, YU Nai-Teng
  • 基金资助:

    The project supported by RGG-HK and by HKUST.

Assembly of Multilayered Films on Core Substrate:Preparation and Characterization

YANG Wen-Jun1, HUANG Qun-Jian1, LI Xiao-Yuan1, YU Nai-Teng1, CARUSO2, Frank2   

  1. 1. Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong;
    2. Max-Plank-Institute of Colloids and Interfaces, Potsdam, Germany
  • Online:2000-12-31 Published:2000-12-31
  • Contact: LI Xiao-Yuan, YU Nai-Teng
  • Supported by:

    The project supported by RGG-HK and by HKUST.

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被引次数

32

摘要：

Certain colloidal metals such as.silver (Ag), gold (Au) and copper, (Cu), when properly or assembled, display remarkable enhancement effect to the Raman scattering cross section of adsorbed molecules. This surface-enhanced Raman scattering (SERS) phenomenon has found wide applications in the study of interfacial chemical processes and is a potentially non-invasive technique in molecule-specific analysis. However, the SERS activity of metal colloids depends sensitively on both the synthetic method and the aggregation and assembly procedure, making it difficult to develop SERS into a reliable and quantitative analytical technique. To solve this problem, one needs to develop a substrate with a well-defined adsorption area and SERS activity. One approach to achieve this goal is to assemble a monolayer of uniform colloidal metals onto a well-defined secondary substrate. Here we report our effort in assembling monolayers of uniform Au nanoparticles on the well-defined optical-inactive microparticles in a layer-by-layer (LbL) manner and the use of such assembly as SERS-active substrate.

Abstract:

Certain colloidal metals such as.silver (Ag), gold (Au) and copper, (Cu), when properly or assembled, display remarkable enhancement effect to the Raman scattering cross section of adsorbed molecules. This surface-enhanced Raman scattering (SERS) phenomenon has found wide applications in the study of interfacial chemical processes and is a potentially non-invasive technique in molecule-specific analysis. However, the SERS activity of metal colloids depends sensitively on both the synthetic method and the aggregation and assembly procedure, making it difficult to develop SERS into a reliable and quantitative analytical technique. To solve this problem, one needs to develop a substrate with a well-defined adsorption area and SERS activity. One approach to achieve this goal is to assemble a monolayer of uniform colloidal metals onto a well-defined secondary substrate. Here we report our effort in assembling monolayers of uniform Au nanoparticles on the well-defined optical-inactive microparticles in a layer-by-layer (LbL) manner and the use of such assembly as SERS-active substrate.

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