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Proceedings Paper

Integrated optical/microfluidic platform for real-time affinity biosensing
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Paper Abstract

A major challenge in many biosensing applications is the real-time detection of a multitude of analytes from a small sample volume. Achieving these goals would perhaps eliminate the need for an intermediate molecular amplification step. Our approach to this challenge involves the investigation of high sensitivity and scalable integrated optical transduction and scalable microfluidic sample delivery. The microfluidic architecture has small cross-section and allows the sample to visit each sensing zone, where a biospecific monolayer performs molecular recognition. Signal transduction occurs via a resonant optical microcavity, which has the dramatically increased signal to noise ratio in fluorescence detection necessary to detect small molecular numbers. Important performance issues in this architecture are sample flow rates, sensing zone size, and the use of passive mixing structures. In addition, microfabrication issues such as optical and microfluidic design, materials, and monolayer patterning are discussed.

Paper Details

Date Published: 21 June 2002
PDF: 8 pages
Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); doi: 10.1117/12.472106
Show Author Affiliations
Layne D. Williams, Univ. of Utah (United States)
Yan Chen, Univ. of Utah (United States)
Steve Blair, Univ. of Utah (United States)

Published in SPIE Proceedings Vol. 4626:
Biomedical Nanotechnology Architectures and Applications
Raymond P. Mariella Jr.; Michelle Palmer; Darryl J. Bornhop; Darryl J. Bornhop; Ramesh Raghavachari; Shuming Nie; Ramesh Raghavachari; Catherine J. Murphy; David A. Dunn; David A. Dunn; Raymond P. Mariella Jr.; Catherine J. Murphy; Dan V. Nicolau; Shuming Nie; Michelle Palmer; Ramesh Raghavachari, Editor(s)

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