Table of Contents Author Guidelines
Advances in OptoElectronics
Volume 2011, Article ID 491609, 4 pages
Research Article

Fluorescence Detection 400–480 nm Using Microfluidic System Integrated GaP Photodiodes

1Department of Electrical Engineering, University of Virginia, 351 McCormick Road, Charlottesville, VA 22904, USA
2Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, VA 22904, USA

Received 29 April 2011; Revised 14 August 2011; Accepted 21 August 2011

Academic Editor: Zhihong Li

Copyright © 2011 Dion McIntosh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Ciprofloxacin is a commonly used antibiotic and the active ingredient in a veterinary antibiotic. Detecting its presence allows us to understand its absorption process in blood as well as tissue. A portable microfluidic system has been fabricated. It operates at low bias voltage and shows a linear relationship between concentration levels and system response. Detection of concentrations down to 1 ppb of ciprofloxacin in microliters of solution was achieved.