期刊
APPLIED PHYSICS LETTERS
卷 104, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4862322
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资金
- Creative Research Initiatives program of the National Research Foundation of Korea (MSIP) [2013-003364]
- National Research Foundation of Korea [2014H1A2A1020549, 2009-0081572, 2012H1A2A1001520] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We demonstrate a simple device to generate chemical concentration gradients in a microfluidic channel using focused travelling surface acoustic waves (F-TSAW). A pair of curved interdigitated metal electrodes deposited on the surface of a piezoelectric (LiNbO3) substrate disseminate high frequency sound waves when actuated by an alternating current source. The F-TSAW produces chaotic acoustic streaming flow upon its interaction with the fluid inside a microfluidic channel, which mixes confluent streams of chemicals in a controlled fashion for an adjustable and rapidly switching gradient generation. (C) 2014 AIP Publishing LLC.
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