本文介绍了纳米粒子的一般概念、特性及本质根源。纳米粒子因其特异的性能在高科技领域得到了日益广泛的应用。文中对纳米材料现有的应用及其前景作了简要的介绍，并综合评述了目前国内外制备纳米粒子的常用方法，综述了引起粒子间团聚的机理和后处理过程中有效地防止团聚的方法。 This article describes the general concepts, properties and intrinsic sources of nanoparticles. Due to their specific properties, nanoparticles have been increasingly used in high-tech fields. In this paper, the current applications of nanomaterials and their prospects are briefly introduced. At the same time, the commonly used methods for preparing nano-particles at home and abroad are summarized. The mechanism of agglomeration between particles and the method of effectively preventing agglomeration during the post-treatment are summarized .