Microfluidic manipulation via Marangoni forces

R. H. Farahi; A. Passian; T. L. Ferrell; T. Thundat

doi:10.1063/1.1812830

Microfluidic manipulation via Marangoni forces

R. H. Farahi, A. Passian, T. L. Ferrell, T. Thundat

Quantum Sensing and Computing

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

A convective flow system is engendered when two liquid droplets, or a liquid droplet and a solid surface, are maintained at different temperatures. Such flows give rise to Marangoni forces which under proper conditions prevent droplet coalescence, cause fluid motion, and dewetting. We present a study of adsorbed and applied fluid movement on a solid surface driven by surface tension gradients created by thermal gradients. Flexible control over the silicone oil and 1,3,5-trinitrotoluene movement is accomplished with an array of individually controllable gold thin film thermal elements on a fused silica substrate surface. We thus demonstrate unlimited fluid movements in one dimension.

Original language	English
Pages (from-to)	4237-4239
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	18
DOIs	https://doi.org/10.1063/1.1812830
State	Published - Nov 1 2004

Funding

The authors thank M. Guillorn at Cornell University for his advice on device fabrication. This research was funded by the U.S. Bureau of Alcohol, Tobacco, and Firearms (ATF), the Federal Aviation Administration (FAA), and the Department of Energy-Basic Energy Sciences (DOE-BES). Oak Ridge National Laboratory is operated and managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.

Funders	Funder number
Department of Energy-Basic Energy Sciences
U.S. Bureau of Alcohol
U.S. Department of Energy	DE-AC05-00OR22725
Federal Aviation Administration

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Microfluidic manipulation via Marangoni forces

Abstract

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