摘要
采用水相硅烷化方法,将γ-氨基丙基三乙氧基硅烷[H2N(CH2)3Si(OC2H5)3](APES)组装在石英表面,在基底表面修饰上氨基为末端的单层膜,并进一步在这种功能化的单层膜基底上组装金纳米粒子得到金纳米粒子/APES/石英的纳米复合结构。以制备的金纳米粒子自组装膜修饰石英为基底及DL-半胱胺酸为中介,利用桑色素(Morin)和DL-半胱胺酸的化学吸附作用,将桑色素间接组装在金纳米粒子自组装膜修饰石英基底表面,所构建的桑色素修饰金纳米粒子自组装膜对三苯基锡有灵敏的荧光识别作用。文章着重研究了桑色素修饰金纳米粒子自组装膜的制备以及组装条件对其荧光行为的影响,探讨了膜的响应特性及响应机理。
Quartz substrate was modified with self-assembled monolayer of γ-aminopropyl-triethylsilane by aqueous phase silanization, giving an homogenous surface terminated with amino groups. Colloidal gold nanoparticles were further assembled on this functionalized monolayer substrate, forming a gold nanoparticles/APES/quartz nanocomposite structure. Flourescent reagent morin was assembled onto the self-assembled multilayer films of gold nanoparticles via DL-cystenine （Cys） intermediate. The morin-modified self-assembled multilayer films of gold nanoparticles could detect triphenyltin fluorimetrically with high sensitivity, and the detection limit was as low as 1. 297 ×10^-8mol·L^-1. The effects of various factors such as concentration of solution, pH, and assembling time were investigated. The response mechanism behind caused the enhancement of relative fluorescence intensity was also discussed.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第10期2102-2106,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(20575023)
福建省自然科学基金项目(D0310016和D0410019)
福建省国际合作重点项目(2006I0021)
中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室开放基金项目(20040102)资助
关键词
荧光
自组装膜
金纳米
桑色素
三苯基锡
Fluorescence
Self-assembled monolayer
Gold nanoparticles
Morin
Triphenyltin
作者简介
何菲，女，1981年生，华侨大学应用化学专业硕士研究生
通讯联系人e-mail：liumy@hqu．edu．cn
