Plasmonic sensing characteristics of single nanometric holes

T Rindzevicius, Y Alaverdyan, Andreas Dahlin, Fredrik Höök, DS Sutherland, M Kall

Research output: Contribution to journalArticlepeer-review

233 Citations (SciVal)

Abstract

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.
Original languageEnglish
Pages (from-to)2335-2339
JournalNano Letters
Volume5
Issue number11
DOIs
Publication statusPublished - 2005

Subject classification (UKÄ)

  • Nano Technology

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