摘要
利用纳米金的表面等离子共振吸收光谱研究了谷胱甘肽(GSH)、L-半胱氨酸(L-Cys)和6-巯基嘌呤(6-MP)3种巯基化合物与纳米金作用的机理。结果表明,3种巯基化合物均能诱导纳米金聚集导致其表面等离子共振吸收峰红移。聚集后的纳米金对介质环境(如溶液极性)的变化较敏感,其吸收峰随着加入分析物的极性变化有规律地红移,并且吸光度也线性下降。可根据波长的红移或吸光度变化确立定量关系,可望用于分析对象的定量检测。
The surface plasmon resonance of gold nanoparticles can be changed due to their shape and size. The assembly of gold nanoparticles were mediated by three sulfhydryl-compounds（glutathione, L-Cysteine, and 6-mercaptopurine） by monitoring the evolution of the surface plasmon resonance band using the spectrophotometric method. After aggregation, the surface plasmon resonance（SPR） peak was sensitive to the surroundings, the ahsorbance strength and SPR position of the SPR were changed regularly with the variation of dielectric constant of the solution. It is hopeful to establish a new, simple and convenient method for the analvte.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第12期19-22,共4页
Materials Reports
基金
国家自然科学基金(21071064)
973重大项目(2010CB833603)
