Localized Surface Plasmon Resonance Imaging: Simultaneous Single Nanoparticle Spectroscopy and Diffusional Dynamics

被引:81
作者
Bingham, Julia M. [1 ]
Willets, Katherine A. [1 ]
Shah, Nilam C. [1 ]
Andrews, David Q. [1 ]
Van Duyne, Richard P. [1 ]
机构
[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
基金
美国国家科学基金会;
关键词
TRANSLATIONAL DIFFUSION; PARTICLE TRACKING; LIGHT-SCATTERING; MEMBRANE; SILVER; CELLS; COEFFICIENTS; NANOPRISMS; PROTEINS;
D O I
10.1021/jp907377h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A wide-field localized surface plasmon resonance (LSPR) imaging method using a liquid crystal tunable filter is used to measure the scattering spectra of multiple Ag nanoparticles in parallel. This method provides the ability to characterize moving Ag nanoparticles by measuring the scattering spectra of the particles while Simultaneously tracking their motion. Consequently, single-particle diffusion coefficients can be determined. As an example, several single Ag nanoprisms are tracked, the LSPR scattering spectrum of each moving particle is obtained, and the single-particle diffusion coefficient is determined from its trajectory. Coupling diffusion information with spectral information in real time is a significant advance and addresses many scientific problems, both fundamental and biological, such as cell membrane protein diffusion, functional plasmonic distributions, and nanoparticle growth mechanisms.
引用
收藏
页码:16839 / 16842
页数:4
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