多壁碳纳米管在精氨酸溶液中分散性的pH敏感性  

pH-Responsive Multi-walled Carbon Nanotube Dispersions in Arginine Solution

作　　者：刘润平[1] 黄可龙[1] 刘素琴[1] 唐金春[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《化学学报》2009年第1期83-87,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.50772133);中南大学博士研究生创新基金(No.134376211)资助项目

摘　　要：通过非共价反应将精氨酸包覆于多壁碳纳米管上,并用荧光分光光度计和原子力显微镜检测其在不同pH值条件下的分散性和凝聚性.结果表明:改性后的碳纳米管的分散性具有pH敏感性,pH值越大,分散性越好,且灵敏度高.同时对其pH敏感性的机理进行了分析与讨论.这将对碳纳米管在药物载送、生物传感等方面的应用有重要的意义.The multi-walled carbon nanotubes （MWNT） were wrapped with arginines in noncovalent interactions and their dispersion and aggregation at different pH was detected using a fluorophotometer and an atomic force microscope. The result shows that the MWNT modified by arginines owns sensitive pH-response dispersions and the higher the pH, the better the dispersion. The mechanism of pH-response was also analyzed and discussed intensively. This will be of great significance for MWNT to be used as drug delivery and sensors in the future.

关 键 词：多壁碳纳米管 精氨酸 非共价修饰 PH敏感性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]