Plasmonic sensing characteristics of single nanometric holes

被引：219

作者：

Rindzevicius, T

Alaverdyan, Y

Dahlin, A

Hook, F

Sutherland, DS

Kall, M ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

[2] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden

来源：

NANO LETTERS | 2005年 / 5卷 / 11期

关键词：

D O I：

10.1021/nl0516355

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The optical response of isolated holes in 20 nm thin gold is probed as a function of alkanethiol CH3(CH2)(x)SH (x is an element of 1-15) and protein adsorption using dark-field spectroscopy. We establish that the plasmon excitations of single and short-range ordered 60 nm holes exhibit similar E-field decay lengths delta approximate to 10-20 nm and that a single hole can be used to resolve the successive adsorption of a protein (biotin-BSA) and its interaction partner (neutravidin). The data confirm the localized character of the hole plasmon and demonstrate that its applicability for bio/chemosensing is similar to that of particle plasmons.

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页码：2335 / 2339

页数：5

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