Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Microwave Dielectric Heating of Fluids in an Integrated Microfluidic Device

Published

Author(s)

Jayna J. Shah, Siddarth Sundaresan, Jon Geist, Darwin Reyes-Hernandez, James Booth, Rao Mulpuri, Michael Gaitan

Abstract

Rapid, selective, and uniform heating of sub-microliter size fluid volumes is vital for micro total analysis system (?gTAS) applications. In this work, we present an approach to localized and selective heating of fluids in a microfluidic network. This is accomplished with microwave dielectric heating by using a coplanar waveguide (CPW) transmission line to deliver heat to a specific region in a microchannel. An elastomeric microchannel was positioned over the CPW fabricated by photolithography on a glass substrate. S-parameter and temperature measurements were used with theoretical analysis to fully characterize the temperature rise of the fluid by microwave power absorption, and it is shown that the temperature rise of the fluid is predominantly due to microwave heating. We observed a 0.95 ?aC/mW temperature rise at 15 GHz. Our theoretical analysis confirms that classical microwave absorption theory is valid at this scale.
Citation
Journal of Micromechanics and Microengineering
Volume
17

Citation

Shah, J. , Sundaresan, S. , Geist, J. , Reyes-Hernandez, D. , Booth, J. , Mulpuri, R. and Gaitan, M. (2007), Microwave Dielectric Heating of Fluids in an Integrated Microfluidic Device, Journal of Micromechanics and Microengineering, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32635 (Accessed November 2, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 2, 2007, Updated October 12, 2021