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Optothermal Analyte Manipulation With Temperature Gradient Focusing

[+] Author Affiliations
M. Akbari, M. Bahrami

Simon Fraser University, Surrey, BC, Canada

D. Sinton

University of Victoria, Victoria, BC, Canada

Paper No. IMECE2010-38908, pp. 773-776; 4 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 10: Micro and Nano Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4447-2
  • Copyright © 2010 by ASME


An optothermal analyte preconcentration method is introduced in this work based on temperature gradient focusing. The present approach offers a flexible, noncontact technique for focusing and transporting of analytes. Here, we use a commercial video projector and an optical system to generate heat and control the heat source position, size and power. This heater is used to focus a sample model analyte, fluorescent dye, at an arbitrary location along the microchannel. Optothermal manipulation of the focused band was demonstrated by projecting a series of images with a moving light band.

Copyright © 2010 by ASME



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