Enhanced resonance light scattering properties of gold nanoparticles due to cooperative binding

被引：26
作者：
Enriquez, A. Cruz [2 ]
Espejel, I. A. Rivero [2 ]
Garcia, E. Andres [1 ]
Diaz-Garcia, M. E. [1 ]
机构：
[1] Univ Oviedo, Dept Phys & Analyt Chem, E-33006 Oviedo, Spain
[2] Technol Inst Tijuana, Tijuana, Baja California, Mexico
来源：
ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2008年 / 391卷 / 03期
关键词：
gold nanoparticles; resonance light scattering; lysine; europium; amino acids;
D O I：
10.1007/s00216-008-1829-y
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The interaction of 11-mercaptoundecanoic acid capped gold nanoparticles (MUA-GNPs) with europium ions and aminoacids has been studied by UV-Vis spectrophotometry, fluorescence, confocal fluorescence microscopy, resonance light scattering and TEM. Results demonstrated that hyper-Rayleigh scattering emission occurs upon the addition of lysine to the MUA-GNPs-Eu(III) system, thus providing an inherently sensitive method for lysine determination. The effects of geometrical factors of the gold nanoparticles (aspect ratio, particle size, cluster formation) and the surrounding medium (pH) on this behavior are discussed. The cooperative binding interactions of Eu3+ and lysine with gold nanoparticles permitted the discrimination of lysine from other amino acids. The probable mechanism for the spectral changes and the enhanced resonance light scattering observed is outlined.
引用
收藏
页码：807 / 815
页数：9
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