Skip to main content

Research Repository

See what's under the surface

Advanced Search

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

Sidahmed A. Abayzeed Sidahmed.Abayzeed@nottingham.ac.uk

Richard J. Smith richard.j.smith@nottingham.ac.uk

Kevin F. Webb kevin.webb@nottingham.ac.uk

Michael G. Somekh

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.

Journal Article Type Article
Journal Optics Express
Electronic ISSN 1094-4087
Publisher Optical Society of America
Peer Reviewed Peer Reviewed
Volume 25
Issue 25
APA6 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
DOI https://doi.org/10.1364/OE.25.031552
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

Files

oe-25-25-31552.pdf (3.4 Mb)
PDF

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





You might also like



Downloadable Citations

;