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通过PPh_3对“非保护型”铂金属纳米簇进行表面修饰,并将其萃取至甲苯中,制备的PPh_3修饰的Pt金属钠米簇于空气中可自发地在玻璃表面生长出均匀透光的金属钠米簇薄膜.该金属钠米簇薄膜经空气中加热处理后可转化为透光导电的氧化铂半导体薄膜.考察了金属钠米簇薄膜生长过程中UV-vis吸收光谱的变化.采用SEM和TEM等方法,表征了纳米簇的粒径及膜的多孔结构,由此解释了其透光原因.研究了薄膜的导电性与处理条件的关系,并采用XPS表征了处理过程中的物质变化.初步探索了PPh_3-Pt纳米簇自发成膜过程的机理,确定了氧气在此过程中的重要作用.
Surface modification of “unprotected” platinum nanoclusters by PPh_3 and its extraction into toluene, the prepared PPh_3 modified Pt nanostructures can spontaneously grow uniformly transparent metal on the glass surface in air Sodium nanocluster film.The metal sodium nanocluster film after heat treatment in the air can be converted into a light-transmissive conductive platinum oxide semiconductor film.We investigated the UV-vis absorption spectra of the metal nanocluster film growth process.Using SEM and TEM and other methods to characterize the particle size of nanoclusters and the porous structure of the film, which explains the reason of the light transmission.The relationship between the conductivity of the film and the processing conditions was studied and XPS was used to characterize the material changes in the process. The mechanism of spontaneous membrane formation of PPh_3-Pt nanoclusters was explored preliminarily, and the important role of oxygen in the process was determined.