Park Sungho, Yang Pengxiang, Corredor Piedad, Weaver Michael J
Department of Chemistry, Purdue University, West Lafayette, IN 47907-1393, USA.
J Am Chem Soc. 2002 Mar 20;124(11):2428-9. doi: 10.1021/ja017406b.
The utilization of surface-attached gold nanoparticles as templates for generating Pt-group particles displaying near-optimal surface-enhanced Raman scattering (SERS) characteristics is described. Essentially epitaxial transition metal coatings down to the monolayer level can be prepared, most readily by the spontaneous replacement of an electrochemically deposited copper layer by the desired Pt-group metal. The and essentially pinhole-free nature of the coated nanoparticles is demonstrated from the form of the SER spectra for chemisorbed carbon monoxide and ethylene. The potential of the present strategy for synthesizing relatively monodispersed "core-shell" nanoparticles using a myriad of coating materials, also displaying SERS activity, is pointed out.
描述了利用表面附着的金纳米颗粒作为模板来生成具有近乎最佳表面增强拉曼散射（SERS）特性的铂族颗粒。基本上可以制备出直至单层水平的外延过渡金属涂层，最容易的方法是通过所需的铂族金属自发取代电化学沉积的铜层。从化学吸附的一氧化碳和乙烯的SERS光谱形式可以证明涂覆纳米颗粒的无针孔性质。指出了使用多种也显示出SERS活性的涂层材料合成相对单分散的“核壳”纳米颗粒的当前策略的潜力。
