Single silver nanoparticles as real-time optical sensors with zeptomole sensitivity

被引：1378

作者：

McFarland, AD ^{[1
]}

Van Duyne, RP ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

NANO LETTERS | 2003年 / 3卷 / 08期

关键词：

D O I：

10.1021/nl034372s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work utilizes dark-field optical microscopy to demonstrate the localized surface plasmon resonance gamma(max) response of individual Ag nanoparticles to the formation of a monolayer of small-molecule adsorbates. The adsorption of fewer than 60 000 1-hexadecanethiol molecules on single Ag nanoparticles results in a localized surface plasmon resonance shift of 40.7 nm. Additionally, the kinetics of the single nanoparticle response was shown to be comparable to that of other real-time sensor technologies.

引用

页码：1057 / 1062

页数：6

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