Visualization of surface acoustic waves in thin liquid films

Rambach, R.W., Taiber, J., Scheck, C.M.L., Meyer, C., Reboud, J. , Cooper, J.M. and Franke, T. (2016) Visualization of surface acoustic waves in thin liquid films. Scientific Reports, 6, 21980. (doi:10.1038/srep21980) (PMID:26917490) (PMCID:PMC4768107)

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Abstract

We demonstrate that the propagation path of a surface acoustic wave (SAW), excited with anWe demonstrate that the propagation path of a surface acoustic wave (SAW), excited with an interdigitated transducer (IDT), can be visualized using a thin liquid film dispensed onto a lithium niobate (LiNbO3) substrate. The practical advantages of this visualization method are its rapid and simple implementation, with many potential applications including in characterising acoustic pumping within microfluidic channels. It also enables low-cost characterisation of IDT designs thereby allowing the determination of anisotropy and orientation of the piezoelectric substrate without the requirement for sophisticated and expensive equipment. Here, we show that the optical visibility of the sound path critically depends on the physical properties of the liquid film and identify heptane and methanol as most contrast rich solvents for visualization of SAW. We also provide a detailed theoretical description of this effect.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cooper, Professor Jonathan and Reboud, Dr Julien and Franke, Professor Thomas
Authors: Rambach, R.W., Taiber, J., Scheck, C.M.L., Meyer, C., Reboud, J., Cooper, J.M., and Franke, T.
College/School:College of Science and Engineering > School of Engineering
Journal Name:Scientific Reports
Publisher:Nature Publishing Group
ISSN:2045-2322
ISSN (Online):2045-2322
Published Online:26 February 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Scientific Reports 6:21980
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.290

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
617021Advanced Diagnostics using PhononicsJonathan CooperEngineering & Physical Sciences Research Council (EPSRC)EP/K027611/1ENG - BIOMEDICAL ENGINEERING