Detection of bio-molecules using conductive chalcogenide glass sensor

Zhiyong Yang, Megan K. Fah, Kelly A. Reynolds, Jonathan D. Sexton, Pierre Lucas

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Novel telluride glasses with high electrical conductivity, wide infrared transparency and good resistance to crystallization are used to design an opto-electrophoretic sensor for detection and identification of hazardous microorganisms. The sensor is based on an attenuated total reflectance element made of Ge-As-Te glass that serves as both an optical sensing zone and an electrode for driving the bio-molecules within the evanescent wave of the sensor. An electric field is applied between the optical element and a counter electrode in order to induce the migration of bio-molecules carrying surface charges. The effect of concentration and applied voltage is tested and the migration effect is shown to be reversible upon switching the electric field. The collected signal is of high quality and can be used to identify different bio-molecules through spectral analysis. This technique therefore provides the ability to detect hazardous microorganisms with high specificity and good sensitivity in aqueous environments.

Original languageEnglish (US)
Title of host publicationConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2011
Number of pages3
StatePublished - 2011
EventConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2011 - Sydney, Australia
Duration: Aug 28 2011Sep 1 2011

Publication series

NameOptics InfoBase Conference Papers
ISSN (Electronic)2162-2701


OtherConference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2011

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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