Localized ultrahigh frequency acoustic fields induced micro-vortices for submilliseconds microfluidic mixing
| Autor: | Meihang He, Wei Pang, Yang Yang, Hao Zhang, Weiwei Cui, Hongxiang Zhang, Xuexin Duan, Daihua Zhang, Hemi Qu |
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| Rok vydání: | 2016 |
| Předmět: |
Acoustic field
Materials science Physics and Astronomy (miscellaneous) business.industry 010401 analytical chemistry Microfluidics 02 engineering and technology Péclet number 021001 nanoscience & nanotechnology Ultrahigh frequency 01 natural sciences 0104 chemical sciences Vortex symbols.namesake Acoustic streaming Optics Ultra high frequency symbols Optoelectronics 0210 nano-technology business Mixing (physics) |
| Zdroj: | Applied Physics Letters. 109:253503 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4972484 |
| Popis: | We present an acoustic microfluidic mixing approach via acousto-mechanically induced micro-vortices sustained by localized ultrahigh frequency (UHF) acoustic fields. A micro-fabricated solid-mounted thin-film piezoelectric resonator (SMR) with a frequency of 1.54 GHz has been integrated into microfluidic systems. Experimental and simulation results show that UHF-SMR triggers strong acoustic field gradients to produce efficient and highly localized acoustic streaming vortices, providing a powerful source for microfluidic mixing. Homogeneous mixing with 87% mixing efficiency at a Peclet number of 35520 within 1 ms has been achieved. The proposed strategy shows a great potential for microfluidic mixing and enhanced molecule transportation in minimized analytical systems. |
| Databáze: | OpenAIRE |
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