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

Modelling for the robust design of layered resonators for ultrasonic particle manipulation
Modelling for the robust design of layered resonators for ultrasonic particle manipulation
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 subwavelength 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 the modelling of quarter wave systems are highlighted. Keywords: acoustic radiation force, layered resonators, robust design, particle manipulation
Townsend, R.J.
0452b21c-a758-4d4a-925b-1511d9296d62
Hill, M.
0cda65c8-a70f-476f-b126-d2c4460a253e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
Townsend, R.J.
0452b21c-a758-4d4a-925b-1511d9296d62
Hill, M.
0cda65c8-a70f-476f-b126-d2c4460a253e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd

Townsend, R.J., Hill, M. and Harris, N.R. (2007) Modelling for the robust design of layered resonators for ultrasonic particle manipulation At International Congress on Ultrasonics (2007 ICU Vienna). 09 - 12 Apr 2007.

Record type: Conference or Workshop Item (Paper)

Abstract

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 subwavelength 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 the modelling of quarter wave systems are highlighted. Keywords: acoustic radiation force, layered resonators, robust design, particle manipulation

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More information

Published date: 2007
Venue - Dates: International Congress on Ultrasonics (2007 ICU Vienna), 2007-04-09 - 2007-04-12

Identifiers

Local EPrints ID: 49058
URI: http://eprints.soton.ac.uk/id/eprint/49058
PURE UUID: da7797f2-7a1b-4e1a-8ef6-4e734423a979
ORCID for M. Hill: ORCID iD orcid.org/0000-0001-6448-9448
ORCID for N.R. Harris: ORCID iD orcid.org/0000-0003-4122-2219

Catalogue record

Date deposited: 25 Oct 2007
Last modified: 17 Jul 2017 14:57

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