由于纳米大小粒子的有趣性质和潜在应用价值,一直受到人们的关注.合成纳米材料的方法很多,如蒸气固化、母体媒介合成、球磨法、磁喷镀、电化学技术、控制溶液中的沉淀反应,每种方法均有其优点和限制.Becker等人首次报道了在自由气流膨胀中形成了H_2、Ar和N_2的簇合物,该方法已广泛用于制备两个到数千个分子大小的簇合物.数千个分子构成的簇合物的大小可出现量子大小效应.因此,气流膨胀法可用来合成纳米材料. Due to the interesting properties and potential applications of nano-sized particles, there are many concerns about the synthesis of nanomaterials, such as steam curing, matrix synthesis, ball milling, magnetic plating, electrochemical techniques, and control of precipitation reactions in solution , Each of which has its advantages and limitations.Becker et al. First reported the formation of clusters of H_2, Ar and N_2 in the free gas flow, which has been widely used to prepare two to several thousand molecular-sized Clusters. The size of a cluster of thousands of molecules can be quantum-sized, so air-flow expansion can be used to synthesize nanomaterials.