Skip to main content

Research Repository

Advanced Search

Highly sensitive multipoint real-time kinetic detection of Surface Plasmon bioanalytes with custom CMOS cameras

Wang, Jing; Smith, Richard J.; Light, Roger A.; Richens, Joanna L.; Zhang, Jing; O'Shea, Paul; See, Chung; Somekh, Michael G.

Authors

Jing Wang

Richard J. Smith

Roger A. Light

Joanna L. Richens

Jing Zhang

Paul O'Shea

Chung See

Michael G. Somekh



Abstract

Phase sensitive Surface Plasmon Resonance (SPR) techniques are a popular means of characterizing biomolecular interactions. However, limitations due to the narrow dynamic range and difficulty in adapting the method for multi-point sensing have restricted its range of applications. This paper presents a compact phase sensitive SPR technology using a custom CMOS camera. The system is exceptionally versatile enabling one to trade dynamic range for sensitivity without altering the optical system. We present results showing sensitivity over the array of better than 10−6 Refractive Index Units (RIU) over a refractive index range of 2×10−2 RIU, with peak sensitivity of 3×10−7 RIU at the center of this range. We also explain how simply altering the settings of polarization components can give sensitivity on the order of 10−8 RIU albeit at the cost of lower dynamic range. The consistent response of the custom CMOS camera in the system also allowed us to demonstrate precise quantitative detection of two Fibrinogen antibody–protein binding sites. Moreover, we use the system to determine reaction kinetics and argue how the multipoint detection gives useful insight into the molecular binding mechanisms.

Journal Article Type Article
Publication Date 2014-08
Journal Biosensors and Bioelectronics
Print ISSN 0956-5663
Electronic ISSN 0956-5663
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 58
Pages 157-164
APA6 Citation Wang, J., Smith, R. J., Light, R. A., Richens, J. L., Zhang, J., O'Shea, P., …Somekh, M. G. (2014). Highly sensitive multipoint real-time kinetic detection of Surface Plasmon bioanalytes with custom CMOS cameras. Biosensors and Bioelectronics, 58, 157-164. https://doi.org/10.1016/j.bios.2014.02.042
DOI https://doi.org/10.1016/j.bios.2014.02.042
Publisher URL http://www.sciencedirect.com/science/article/pii/S0956566314001304
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
Additional Information This article is maintained by: Elsevier; Article Title: Highly sensitive multipoint real-time kinetic detection of Surface Plasmon bioanalytes with custom CMOS cameras; Journal Title: Biosensors and Bioelectronics; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.bios.2014.02.042; Content Type: article; Copyright: Copyright © 2014 The Authors. Published by Elsevier B.V.

Files

Wang_biosensors.pdf (790 Kb)
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

;