金纳米粒子的电化学制备和AFM表征(英文)

Electrochemical preparation and AFM characterization of gold nanoparticles on HOPG

本文以高序石墨为基底 ,氯金酸溶液为支持电解质 ,以对表面破坏力小的轻敲模式原子力显微镜为观察手段 ,研究基底的表面状态及电沉积条件对形成的纳米颗粒尺寸和形态的影响 。

We present a study on the electrochemical preparation of Au nanoparticles on HOPG from HAuCl 4 solution characterized by tapping mode AFM. It has been shown that deposition on activated HOPG and non activated HOPG follows progressive and instantaneous nucleation and growth mode, respectively. The size and morphology of the nanoparticles depends on the deposition condition. Au nanoparticles of narrow size distribution of～50 nm can be prepared which has a tendency to arrange into a two dimensional order on homogeneous HOPG (non activated). The electrocatalytic properties and SERS properties of the Au nanoparticles are briefly discussed.