Ag纳米晶颗粒/碳纳米管复合材料的制备与结构研究  

Research on Fabrication and Structure of Ag Nanoparticle/Carbon Nanotubes Composites

作　　者：吴永庆[1,2,3] 李效民[2] 王震遐[4] 张亦文[2,3] 夏长泰[1] 徐军[2] 

机构地区：[1]中国科学院上海光学精密机械研究所激光与光电材料实验室,上海201800 [2]中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室,上海200050 [3]中国科学院研究生院,北京100049 [4]中国科学院上海应用物理研究所,上海201800

出　　处：《无机材料学报》2009年第1期122-124,共3页Journal of Inorganic Materials

基　　金：国家杰出青年基金(60425516);国家重点实验室开放基金(SKL200605SIC)

摘　　要：利用热蒸发方法在多壁碳纳米管表面沉积Ag纳米颗粒,XRD结果显示,Ag纳米颗粒以晶体形态存在,同时透射电镜分析结果表明,Ag纳米晶颗粒引起碳纳米管横截面形变,从而形成Ag纳米晶颗粒/碳纳米管异质复合材料,这些纳米异质复合材料相互连接,形成网络化分布的结构.Ag nanoparticles were prepared on the surface of multi-walled carbon nanotubes （MCNTs） by thermal evaporation deposition at room temperature. The morphology and microstructures of Ag/CNTs composites were characterized by SEM,XRD,TEM and HRTEM. The measurement results verify the nanocrystal shape of Ag nanoparticles on the MCNTs. Ag nanoparticles are distributed evenly on the MCNTs and the density of Ag nanoparticles reaches 10^11 cm^-2. Ag nanoparticles present round or elliptical patterns and the round particles have larger diameter than the elliptical ones. The MCNTs are deformed at where Ag nanoparticles grow, which should be attributed to the interaction between Ag nanoparticles and MCNTs during the evolution. The heterojuntion materials are formed by the deformed MCNTs and as-grown Ag nanoparticles. It is found that the heterojuntion materials share mutual connections and constitute a net structure because the chemical bonds between Ag nanoparticles and MCNTs have fixation on reciprocal chiasmata MCNTs. The as-prepared 0-1 dimensional materials have promising applications in sensors, catalysis and optoelectronic devices.

关 键 词：碳纳米管 AG纳米颗粒 制备 结构 

分 类 号：O657[理学—分析化学] O72[理学—化学]