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Modelling for the robust design of layered resonators for ultrasonic particle manipulation

Hill, Martyn, Townsend, Rosemary J. and Harris, Nicholas R. (2008) Modelling for the robust design of layered resonators for ultrasonic particle manipulation Ultrasonics, 48, (6-7), pp. 521-528.

Record type: Article


Several approaches have been described for the manipulation of particles within an ultrasonic field. Of those based on standing waves, devices in which the critical dimension of the resonant chamber is less than a wavelength are particularly well suited to microfluidic, or “lab on a chip” applications. These might include pre-processing or fractionation of samples prior to analysis, formation of monolayers for cell interaction studies, or the enhancement of biosensor detection capability. The small size of microfluidic resonators typically places tight tolerances on the positioning of the acoustic node, and such systems are required to have high transduction efficiencies, for reasons of power availability and temperature stability. Further, the expense of many microfabrication methods precludes an iterative experimental approach to their development. Hence, the ability to design sub-wavelength resonators that are efficient, robust and have the appropriate acoustic energy distribution is extremely important. This paper discusses one-dimensional modelling used in the design of ultrasonic resonators for particle manipulation and gives example of their uses to predict and explain resonator behaviour. Particular difficulties in designing quarter wave systems are highlighted, and modelling is used to explain observed trends and predict performance of such resonators, including their performance with different coupling layer materials.

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Submitted date: 11 June 2007
Published date: November 2008
Keywords: acoustic radiation force, layered resonators, robust design, particle manipulation


Local EPrints ID: 52030
ISSN: 0041-624X
PURE UUID: 79a904ec-8f34-4fdc-9ea7-8b51df5622df
ORCID for Martyn Hill: ORCID iD
ORCID for Nicholas R. Harris: ORCID iD

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Date deposited: 05 Jun 2008
Last modified: 11 Aug 2017 01:59

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Author: Martyn Hill ORCID iD
Author: Rosemary J. Townsend
Author: Nicholas R. Harris ORCID iD

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