Rimsa, R orcid.org/0000-0002-8915-5361, Smith, AJ orcid.org/0000-0001-9004-897X, Walti, C orcid.org/0000-0001-9286-5359 et al. (1 more author) (2017) A planar surface acoustic wave micropump for closed-loop microfluidics. Applied Physics Letters, 111 (23). 234102. ISSN 0003-6951
Abstract
We have designed and characterized a simple Rayleigh-surface acoustic wave-based micropump, integrated directly with a fully enclosed 3D microfluidic system, which improves significantly the pumping efficiency within a coupled fluid whilst maintaining planar integration of the micropump and microfluidics. We achieve this by exploiting the Rayleigh-scattering angle of surface acoustic waves into pressure waves on contact with overlaid fluids, by designing a microfluidic channel aligned almost co-linearly with the launched pressure waves and by minimizing energy losses by reflections from, or absorption within, the channel walls. This allows the microfluidic system to remain fully enclosed—a pre-requisite for point-of-care applications—removing sources of possible contamination, whilst achieving pump efficiencies up to several orders of magnitude higher than previously reported, at low operating powers of 0.5 W.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) |
Keywords: | Surface acoustic waves; SAWs; Microfluidics; Micropumps; Point of care diagnostics |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number Wellcome Trust 201058/Z/16/Z |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Dec 2017 16:54 |
Last Modified: | 16 Dec 2024 12:59 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.5007701 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125082 |