单壁碳纳米管氧化过程的银纳米粒子跟踪  

Tracing the Chemical Oxidation Process of Single walled Carbon Nanotubes by Silver Nanoparticles

作　　者：牛佳莉[1] 邹红玲[1] 张锦[1] 刘忠范[1] 

机构地区：[1]北京大学化学与分子工程学院北京大学纳米科学与技术研究中心,北京100871

出　　处：《物理化学学报》2004年第1期1-4,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(90206023;30000044);国家重点基础研究发展规划(2001CB6105)资助项目~~

摘　　要：基于银与羧基之间的相互作用,利用银纳米粒子跟踪稀硝酸氧化单壁碳纳米管的过程.通过比较银纳米粒子对稀硝酸氧化不同时间所得单壁碳纳米管的跟踪情况,推测了该氧化可能是沿着碳纳米管的缺陷边缘处对其进行缓慢腐蚀的过程.We proposed here a simple technique for tracing the chemical oxidation process of single walled carbon nanotubes(SWNTs) by using silver nanoparticles. SWNTs were prepared by chemical vapor deposition (CVD) and dilute nitricacid(2.6 mol· L- 1) was used as oxidant for introducing carboxylic acid groups at the end or surface of the tubes. Based on the interaction between - COOH groups and silver nanoparticles, the oxidation procedure can be traced successfully. The results suggest that refluxing of SWNTs in HNO3 may introduce carboxylic acid groups mostly at the original defect sites and few defect is newly created along the SWNTs walls.

关 键 词：单壁碳纳米管 氧化过程 银纳米粒子 稀硝酸 缺陷 腐蚀 

分 类 号：O613.71[理学—无机化学]