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

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.