Abstract: The preparation methods of Au nanoparticles，including citrate reduction method，two-phase method and seed mediate method were discussed. A brief introduction of Au preparation assisted by physical methods such as under laser radiation and ultrasonic field condition was given. The properties and applications of Au nanoparticles were also reviewed.

摘要： 介绍了金纳米粒子的物理化学特性，归纳了金纳米粒子的制备方法，如传统的柠檬酸钠还原法、以两相或多相体系为基础的相转移法以及分两步合成的晶种法等，并对物理辅助制备方法如在制备过程中引入超声场、激光辐射等手段进行了简单的介绍。还对金纳米粒子的应用研究进展进行了综述。