Surface Acoustic Wave-Based Microfluidic Device for Microparticles Manipulation: Effects of Microchannel Elasticity on the Device Performance

被引:2
|
作者
Mezzanzanica, Gianluca [1 ]
Francais, Olivier [2 ]
Mariani, Stefano [1 ]
机构
[1] Politecn Milan, Dept Civil & Environm Engn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
[2] Univ Gustave Eiffel, CNRS, Elect Commun Syst & Microsyst ESYCOM, F-77454 Marne La Vallee, France
关键词
acoustofluidics; surface acoustic waves; finite element analysis; PDMS elasticity; CELL-SEPARATION; ACOUSTOFLUIDICS; CHIP; ACOUSTOPHORESIS; PARTICLES; SYSTEMS; BLOOD;
D O I
10.3390/mi14091799
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Size sorting, line focusing, and isolation of microparticles or cells are fundamental ingredients in the improvement of disease diagnostic tools adopted in biology and biomedicine. Microfluidic devices are exploited as a solution to transport and manipulate (bio)particles via a liquid flow. Use of acoustic waves traveling through the fluid provides non-contact solutions to the handling goal, by exploiting the acoustophoretic phenomenon. In this paper, a finite element model of a microfluidic surface acoustic wave-based device for the manipulation of microparticles is reported. Counter-propagating waves are designed to interfere inside a PDMS microchannel and generate a standing surface acoustic wave which is transmitted to the fluid as a standing pressure field. A model of the cross-section of the device is considered to perform a sensitivity analysis of such a standing pressure field to uncertainties related to the geometry of the microchannel, especially in terms of thickness and width of the fluid domain. To also assess the effects caused by possible secondary waves traveling in the microchannel, the PDMS is modeled as an elastic solid material. Remarkable effects and possible issues in microparticle actuation, as related to the size of the microchannel, are discussed by way of exemplary results.
引用
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页数:25
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