Plasmon resonance measurements of the adsorption and adsorption kinetics of a biopolymer onto gold nanocolloids

被引：106
作者：
Eck, D
Helm, CA
Wagner, NJ
Vaynberg, KA
机构：
[1] Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany
[2] Univ Delaware, Dept Chem Engn, Ctr Mol & Engn Thermodynam, Newark, DE 19716 USA
来源：
LANGMUIR | 2001年 / 17卷 / 04期
关键词：
D O I：
10.1021/la001142+
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A shift in plasmon surface resonance is measured for colloidal solutions of gold nanoparticles upon adsorption of polyampholyte (gelatin). It is demonstrated that the shift in wavelength of the absorption maximum can quantitatively yield measurements of the adsorbed amount as well as information about the structure of the adsorbed polymer layer. Semiquantitative agreement is found with calculations based on the Mie theory in the quasi-static Limit. The method is demonstrated to provide quantitative measurements of the kinetics of biopolymer adsorption onto colloidal nanoparticles in solution.
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页码：957 / 960
页数：4
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