Microfluidic manipulation via Marangoni forces
2004; American Institute of Physics; Volume: 85; Issue: 18 Linguagem: Inglês
10.1063/1.1812830
ISSN1520-8842
AutoresR. H. Farahi, Ali Passian, T. L. Ferrell, Thomas Thundat,
Tópico(s)Microfluidic and Bio-sensing Technologies
ResumoA 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.
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