Microfluidic device based on surface acoustic wave
| Autor: | Omar Elmazria, L. Le Brizoual, Patrick Alnot, D. Beyssen |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Microfluidics Surface acoustic wave Metals and Alloys Analytical chemistry Substrate (electronics) Acoustic wave Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Planar Plasma-enhanced chemical vapor deposition Materials Chemistry Miniaturization Piezoelectric substrate Electrical and Electronic Engineering Composite material Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 118:380-385 |
| ISSN: | 0925-4005 |
| Popis: | Microfluidic systems can be implemented for miniaturization of chemical and biological processes on a sub-millimeter scale. In this study, surface acoustic waves (SAW) were used to actuate small droplet (from 2 to 20 μl) on planar surface of a piezoelectric substrate. In order to improve the droplet displacements, a hydrophobic film was deposited on the LiNbO 3 substrate. We have deposited by plasma enhanced chemical vapor deposition a-CF X film. All those films were compared to a spin coated PVDF, the best hydrophobic film was realised for P G = 100 W and P R = 400 mT. This film has a sliding force around 85 μN. We studied the effect of different viscosities by using water/glycerol mixtures. This device propelled a water droplet at 40 mm/s, while the velocity of a glycerol droplet will not exceed 2 mm/s. The study of the droplet motion by a high-speed acquisition camera demonstrates a periodical phenomenon at a frequency of 120 Hz for pure water. |
| Databáze: | OpenAIRE |
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