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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 14 — Jul. 5, 2010
  • pp: 15174–15182

Protease detection using a porous silicon based Bloch surface wave optical biosensor

Hong Qiao, Bin Guan, J. Justin Gooding, and Peter J Reece  »View Author Affiliations


Optics Express, Vol. 18, Issue 14, pp. 15174-15182 (2010)
http://dx.doi.org/10.1364/OE.18.015174


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Abstract

In this article we present an optical biosensor for label-free detection of trace levels of protease activity. The scheme is based on surface functionalized porous silicon optical structures which supports optical Bloch surface modes. The optical structure provides a resonant optical mode for high sensitivity detection and open access of the sensing layer to the target enzyme. Protease detection is based on the digestion of gelatin, covalently attached inside the pore space, resulting in a spectral blue-shift of the optical mode. Monitoring of spatially separated resonant optical modes is used to eliminate optical response from nonspecific adsorption.

© 2010 OSA

OCIS Codes
(240.6690) Optics at surfaces : Surface waves
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Sensors

History
Original Manuscript: May 6, 2010
Revised Manuscript: June 12, 2010
Manuscript Accepted: June 24, 2010
Published: June 30, 2010

Virtual Issues
Vol. 5, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Hong Qiao, Bin Guan, J. Justin Gooding, and Peter J Reece, "Protease detection using a porous silicon based Bloch surface wave optical biosensor," Opt. Express 18, 15174-15182 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-14-15174


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