Cargando…
Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays
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 influ...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2010
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231022/ https://www.ncbi.nlm.nih.gov/pubmed/22163441 http://dx.doi.org/10.3390/s101109808 |
_version_ | 1782218125627883520 |
---|---|
author | MacKenzie, Robert Fraschina, Corrado Sannomiya, Takumi Auzelyte, Vaida Vörös, Janos |
author_facet | MacKenzie, Robert Fraschina, Corrado Sannomiya, Takumi Auzelyte, Vaida Vörös, Janos |
author_sort | MacKenzie, Robert |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-3231022 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-32310222011-12-07 Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays MacKenzie, Robert Fraschina, Corrado Sannomiya, Takumi Auzelyte, Vaida Vörös, Janos Sensors (Basel) Article 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. Molecular Diversity Preservation International (MDPI) 2010-11-02 /pmc/articles/PMC3231022/ /pubmed/22163441 http://dx.doi.org/10.3390/s101109808 Text en © 2010 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/. (http://creativecommons.org/licenses/by/3.0/) ) |
spellingShingle | Article MacKenzie, Robert Fraschina, Corrado Sannomiya, Takumi Auzelyte, Vaida Vörös, Janos Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title | Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title_full | Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title_fullStr | Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title_full_unstemmed | Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title_short | Optical Sensing with Simultaneous Electrochemical Control in Metal Nanowire Arrays |
title_sort | optical sensing with simultaneous electrochemical control in metal nanowire arrays |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231022/ https://www.ncbi.nlm.nih.gov/pubmed/22163441 http://dx.doi.org/10.3390/s101109808 |
work_keys_str_mv | AT mackenzierobert opticalsensingwithsimultaneouselectrochemicalcontrolinmetalnanowirearrays AT fraschinacorrado opticalsensingwithsimultaneouselectrochemicalcontrolinmetalnanowirearrays AT sannomiyatakumi opticalsensingwithsimultaneouselectrochemicalcontrolinmetalnanowirearrays AT auzelytevaida opticalsensingwithsimultaneouselectrochemicalcontrolinmetalnanowirearrays AT vorosjanos opticalsensingwithsimultaneouselectrochemicalcontrolinmetalnanowirearrays |