Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles

Liubiao Zhong; Yueyue Jiang; Chihao Liow; Fanben Meng; Yinghui Sun; Bevita K. Chandran; Ziqiang Liang; Lin Jiang; Shuzhou Li; Xiaodong Chen

doi:10.1002/smll.201501627

Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles

Liubiao Zhong, Yueyue Jiang, Chihao Liow, Fanben Meng, Yinghui Sun, Bevita K. Chandran, Ziqiang Liang, Lin Jiang, Shuzhou Li, Xiaodong Chen

Mechanical Engineering

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11 Scopus citations

Abstract

Electron-photon coupling in metal nanostructures has raised a new trend for active plasmonic switch devices in both fundamental understanding and technological applications. However, low sensitivity switches with an on/off ratio less than 5 have restricted applications. In this work, an electrically modulated plasmonic switch based on a surface-enhanced Raman spectroscopy (SERS) system with a single fivefold stellate polyhedral gold nanoparticle (FSPAuNP) is reported. The reversible switch of the SERS signal shows high sensitivity with an on/off ratio larger than 30. Such a high on/off ratio arises primarily from the plasmonic resonance shift of the FSPAuNP with the incident laser due to the altered free electron density on the nanoparticle under an applied electrochemical potential. This highly sensitive electro-plasmonic switch may enable further development of plasmonic devices.

Original language	English (US)
Pages (from-to)	5395-5401
Number of pages	7
Journal	Small
Volume	11
Issue number	40
DOIs	https://doi.org/10.1002/smll.201501627
State	Published - Oct 1 2015

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

Au nanoparticles
electro-plasmonic switches
fivefold stellate polyhedrons
single nanoparticle electrodes

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title = "Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles",

abstract = "Electron-photon coupling in metal nanostructures has raised a new trend for active plasmonic switch devices in both fundamental understanding and technological applications. However, low sensitivity switches with an on/off ratio less than 5 have restricted applications. In this work, an electrically modulated plasmonic switch based on a surface-enhanced Raman spectroscopy (SERS) system with a single fivefold stellate polyhedral gold nanoparticle (FSPAuNP) is reported. The reversible switch of the SERS signal shows high sensitivity with an on/off ratio larger than 30. Such a high on/off ratio arises primarily from the plasmonic resonance shift of the FSPAuNP with the incident laser due to the altered free electron density on the nanoparticle under an applied electrochemical potential. This highly sensitive electro-plasmonic switch may enable further development of plasmonic devices.",

keywords = "Au nanoparticles, electro-plasmonic switches, fivefold stellate polyhedrons, single nanoparticle electrodes",

author = "Liubiao Zhong and Yueyue Jiang and Chihao Liow and Fanben Meng and Yinghui Sun and Chandran, {Bevita K.} and Ziqiang Liang and Lin Jiang and Shuzhou Li and Xiaodong Chen",

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AU - Zhong, Liubiao

AU - Jiang, Yueyue

AU - Liow, Chihao

AU - Meng, Fanben

AU - Sun, Yinghui

AU - Chandran, Bevita K.

AU - Liang, Ziqiang

AU - Jiang, Lin

AU - Li, Shuzhou

AU - Chen, Xiaodong

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Electron-photon coupling in metal nanostructures has raised a new trend for active plasmonic switch devices in both fundamental understanding and technological applications. However, low sensitivity switches with an on/off ratio less than 5 have restricted applications. In this work, an electrically modulated plasmonic switch based on a surface-enhanced Raman spectroscopy (SERS) system with a single fivefold stellate polyhedral gold nanoparticle (FSPAuNP) is reported. The reversible switch of the SERS signal shows high sensitivity with an on/off ratio larger than 30. Such a high on/off ratio arises primarily from the plasmonic resonance shift of the FSPAuNP with the incident laser due to the altered free electron density on the nanoparticle under an applied electrochemical potential. This highly sensitive electro-plasmonic switch may enable further development of plasmonic devices.

AB - Electron-photon coupling in metal nanostructures has raised a new trend for active plasmonic switch devices in both fundamental understanding and technological applications. However, low sensitivity switches with an on/off ratio less than 5 have restricted applications. In this work, an electrically modulated plasmonic switch based on a surface-enhanced Raman spectroscopy (SERS) system with a single fivefold stellate polyhedral gold nanoparticle (FSPAuNP) is reported. The reversible switch of the SERS signal shows high sensitivity with an on/off ratio larger than 30. Such a high on/off ratio arises primarily from the plasmonic resonance shift of the FSPAuNP with the incident laser due to the altered free electron density on the nanoparticle under an applied electrochemical potential. This highly sensitive electro-plasmonic switch may enable further development of plasmonic devices.

KW - Au nanoparticles

KW - electro-plasmonic switches

KW - fivefold stellate polyhedrons

KW - single nanoparticle electrodes

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Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles

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