多壁碳纳米管上原位生长CdTe量子点及与牛血清蛋白的偶联  

In Situ Grown CdTe Quantum Dots on MWCNTs and Its Coupling with BSA

作　　者：陈莉华[1,2] 李佑稽[1] 晏学万[1] 杨钊[1] 张俊生[1] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]南京大学生命分析化学教育部重点实验室,江苏南京210093

出　　处：《吉首大学学报（自然科学版）》2012年第4期101-105,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：南京大学生命分析化学教育部重点实验室开放基金资助项目(KLACLS1003);国家自然科学基金资助项目(50802034)

摘　　要：以巯基乙酸为稳定剂在水溶液中使Cd2+与NaTeH在多壁碳纳米管(MWCNTs)上原位生长CdTe量子点(QDs),并与生物分子牛血清蛋白(BSA)偶联.通过电镜、荧光、紫外、傅立叶红外等技术,对量子点-碳纳米管异质结(CdTe-MWCNTs)及异质结-牛血清蛋白复合物(CdTe-MWCNTs-BSA)进行表征.结果表明,活化的碳纳米管有微弱荧光,CdTe-MWCNTs异质结及CdTe-MWCNTs-BSA复合物均具有荧光性质,在碳纳米管壁上的CdTe量子点直径大约5nm,它们具有不同的红外光谱特征.The CdTe quantum dots grew in situ on the multiwalled carbon nanotubes （MWCNTs） with thioglycollic acid as the stabilizer, Cd2＋ and NaTeH as reactant in aqueous solution. The as prepared CdTe-MWCNTs quantum dots-MWCNTs heterojunctions could couple with bovine serum albumin （BSA）. Both CdTe-MWCNTs and CdTe-MWCNTs-BSA were characterized by TEM, fluorescence spec- trum,UV and FT-IR measurements. The fluorescence analysis showed that functionalized MWCNTs had weak fluorescence, both CdTe-MWCNTs heterojunctions and CdTe-MWCNTs-BSA multiplex exhibited fluorescence absorption. The TEM results revealed that the diameter of CdTe quantum dots was about 5 nm. The FT-IR spectra indicated that the CdTe quantum dots grew on the functionalized MWCNTs and coupled with BSA.

关 键 词：多壁碳纳米管 CDTE量子点 牛血清蛋白 

分 类 号：O631[理学—高分子化学]