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Thermocapillary actuation of liquids using patterned microheater arrays

Valentino, Joseph P. and Darhuber, Anton A. and Troian, Sandra M. and Wagner, Sigurd (2003) Thermocapillary actuation of liquids using patterned microheater arrays. In: Proceedings of the 12th International Conference on TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, Boston, June 8-12, 2003. Vol.1. IEEE , Los Alamitos, CA, pp. 667-669. ISBN 0-7803-7731-1 http://resolver.caltech.edu/CaltechAUTHORS:VALtransducers03

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Abstract

We demonstrate a microfluidic actuation technique capable of directing nanoliter liquid samples on the surface of a glass substrate through the use of both electronically addressable heater arrays and chemical patterning. Pathways for liquid movement are delineated by the arrangement of microheaters, which also provide the thermocapillary actuating force. The drops are confined by selectively depositing a fluorinated monolayer to the surface, which defines the channel edges. Operating voltages in the range of 2-3V were used to move, split, and trap liquids. This fluid transportation technique enables direct access to liquid samples for handling and diagnostic purposes and offers a low power alternative to existing microfluidic systems.


Item Type:Book Section
Additional Information:© Copyright 2003 IEEE. Reprinted with permission. This work is funded by NSF grant CTS-0088774, MRSEC grant DMR-9809483, and a NJCST grant.
Record Number:CaltechAUTHORS:VALtransducers03
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:VALtransducers03
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4963
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:15 Sep 2006
Last Modified:26 Dec 2012 09:02

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