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Zhong L, Jiang Y, Liow C, et al. Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles. Small. 2015;11(40):5395-401doi: 10.1002/smll.201501627.
Zhong, L., Jiang, Y., Liow, C., Meng, F., Sun, Y., Chandran, B. K., Liang, Z., Jiang, L., Li, S., & Chen, X. (2015). Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles. Small (Weinheim an der Bergstrasse, Germany), 11(40), 5395-401. https://doi.org/10.1002/smll.201501627
Zhong, Liubiao, et al. "Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles." Small (Weinheim an der Bergstrasse, Germany) vol. 11,40 (2015): 5395-401. doi: https://doi.org/10.1002/smll.201501627
Zhong L, Jiang Y, Liow C, Meng F, Sun Y, Chandran BK, Liang Z, Jiang L, Li S, Chen X. Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles. Small. 2015 Oct 28;11(40):5395-401. doi: 10.1002/smll.201501627. Epub 2015 Aug 27. PMID: 26313565.
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Small. 2015 Oct 28;11(40):5395-401. doi: 10.1002/smll.201501627. Epub 2015 Aug 27.

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

Small (Weinheim an der Bergstrasse, Germany)

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

Affiliations

  1. Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, China.
  2. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.

PMID: 26313565 DOI: 10.1002/smll.201501627

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.

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

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

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