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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-43529

MacKenzie, R; Fraschina, C; Sannomiya, T; Auzelyte, V; Vörös, J (2010). Optical sensing with simultaneous electrochemical control in metal nanowire arrays. Sensors, 10(11):9808-9830.

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Abstract

This work explores the alternative use of noble metal nanowire systems in large-scale array configurations to exploit both the nanowires’ conductive nature and localized surface plasmon resonance (LSPR). The first known nanowire-based system has been constructed, with which optical signals are influenced by the simultaneous application of electrochemical potentials. Optical characterization of nanowire arrays was performed by measuring the bulk refractive index sensitivity and the limit of detection. The formation of an electrical double layer was controlled in NaCl solutions to study the effect of local refractive index changes on the spectral response. Resonance peak shifts of over 4 nm, a bulk refractive index sensitivity up to 115 nm/RIU and a limit of detection as low as 4.5 × 10−4 RIU were obtained for gold nanowire arrays. Simulations with the Multiple Multipole Program (MMP) confirm such bulk refractive index sensitivities. Initial experiments demonstrated successful optical biosensing using a novel form of particle-based nanowire arrays. In addition, the formation of an ionic layer (Stern-layer) upon applying an electrochemical potential was also monitored by the shift of the plasmon resonance.

Citations

7 citations in Web of Science®
9 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Biomedical Engineering
DDC:170 Ethics
610 Medicine & health
Language:English
Date:2010
Deposited On:26 Jan 2011 14:18
Last Modified:17 Dec 2013 09:47
Publisher:Molecular Diversity Preservation International (MDPI)
ISSN:1424-8220
Free access at:Related URL. An embargo period may apply.
Publisher DOI:10.3390/s101109808
Related URLs:http://www.mdpi.com/1424-8220/10/11/9808/ (Publisher)

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