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Sensitive detection of voltage transients using differential intensity surface plasmon resonance system

Abayzeed, Sidahmed A.; Smith, Richard J.; Webb, Kevin F.; Somekh, Michael G.; See, Chung W.

Authors

RICHARD SMITH richard.j.smith@nottingham.ac.uk
Assistant Professor in Optical and Electronic Engineering

Chung W. See chung.see@nottingham.ac.uk



Abstract

This paper describes theoretical and experimental study of the fundamentals of using surface plasmon resonance (SPR) for label-free detection of voltage. Plasmonic voltage sensing relies on the capacitive properties of metal-electrolyte interface that are governed by electrostatic interactions between charge carriers in both phases. Externally-applied voltage leads to changes in the free electron density in the surface of the metal, shifting the SPR position. The study shows the effects of the applied voltage on the shape of the SPR curve. It also provides a comparison between the theoretical and experimental response to the applied voltage. The response is presented in a universal term that can be used to assess the voltage sensitivity of different SPR instruments. Finally, it demonstrates the capacity of the SPR system in resolving dynamic voltage signals; a detection limit of 10mV with a temporal resolution of 5ms is achievable. These findings pave the way for the use of SPR systems in the detection of electrical activity of biological cells.

Citation

Abayzeed, S. A., Smith, R. J., Webb, K. F., Somekh, M. G., & See, C. W. (in press). Sensitive detection of voltage transients using differential intensity surface plasmon resonance system. Optics Express, 25(25), https://doi.org/10.1364/OE.25.031552

Journal Article Type Article
Acceptance Date Aug 11, 2017
Online Publication Date Dec 4, 2017
Deposit Date Oct 2, 2017
Publicly Available Date Dec 4, 2017
Journal Optics Express
Electronic ISSN 1094-4087
Publisher Optical Society of America
Peer Reviewed Peer Reviewed
Volume 25
Issue 25
DOI https://doi.org/10.1364/OE.25.031552
Public URL http://eprints.nottingham.ac.uk/id/eprint/46901
Publisher URL https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-25-31552
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0


oe-25-25-31552.pdf (3.5 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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