大粒径单分散金纳米粒子的水相合成

Preparation of Gold Sols of Large Size Particles

近年来，随着纳米科技的兴起，纳米尺度的金颗粒以其独特的光学、电学性质［１-３］在许多领域表现出潜在的应用价值，引起了人们浓厚的研究兴趣［４-７］．迄今为止，已有多种制备金纳米粒子的方法见诸报导．制备简便、单分散性好、粒径可控,一直是各种方法追求的目标．...

With 50nm gold nanoparticles as seeds,a series of spherical monodispersed gold nanoparticles(size from 60nm to 160nm) were obtained by surface autocatalytic reaction.The gold sols were characterized using transmission electron microscopy(TEM) and UV Vis spectrometry. The size of nanoparticles can be conveniently predicted by controlling the molar ratios of the total gold species in solution to that in seeding sols.The morphology of resulted gold nanoparticles was found depending on the reagent adding sequences.