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A microfabricated ultrasonic particle manipulator with frequency selectable nodal planes

A microfabricated ultrasonic particle manipulator with frequency selectable nodal planes
A microfabricated ultrasonic particle manipulator with frequency selectable nodal planes
Ultrasonic devices designed to manipulate particles rely on an ability to predict the nature of the standing wave within a resonator. The interaction between the properties of the layers within the resonator can generate standing waves that vary significantly from the classic rigid boundary model for half-wavelength resonances. A simple, two layer, model demonstrates the dependence of standing wave characteristics on the impedance of a reflecting boundary. A multi-layer model that includes a representation of the primary radiation forces on particles is then used to refine the resonator design and allow for interactions with the other layers. Both models predict that resonators with subwavelength critical dimensions can be designed with multiple modes each with pressure nodes at different positions. The models have been used to design a microfabricated resonator with modes that allow particles to be forced to either boundary of the fluid or to the fluid centre, depending on the operating frequency.
1647-1650
Hill, M.
0cda65c8-a70f-476f-b126-d2c4460a253e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
Townsend, R.J.
0452b21c-a758-4d4a-925b-1511d9296d62
White, N.M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Beeby, S.P.
ba565001-2812-4300-89f1-fe5a437ecb0d
Hill, M.
0cda65c8-a70f-476f-b126-d2c4460a253e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
Townsend, R.J.
0452b21c-a758-4d4a-925b-1511d9296d62
White, N.M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Beeby, S.P.
ba565001-2812-4300-89f1-fe5a437ecb0d

Hill, M., Harris, N.R., Townsend, R.J., White, N.M. and Beeby, S.P. (2003) A microfabricated ultrasonic particle manipulator with frequency selectable nodal planes At World Congress on Ultrasonics. 07 - 10 Sep 2003. 4 pp, pp. 1647-1650.

Record type: Conference or Workshop Item (Paper)

Abstract

Ultrasonic devices designed to manipulate particles rely on an ability to predict the nature of the standing wave within a resonator. The interaction between the properties of the layers within the resonator can generate standing waves that vary significantly from the classic rigid boundary model for half-wavelength resonances. A simple, two layer, model demonstrates the dependence of standing wave characteristics on the impedance of a reflecting boundary. A multi-layer model that includes a representation of the primary radiation forces on particles is then used to refine the resonator design and allow for interactions with the other layers. Both models predict that resonators with subwavelength critical dimensions can be designed with multiple modes each with pressure nodes at different positions. The models have been used to design a microfabricated resonator with modes that allow particles to be forced to either boundary of the fluid or to the fluid centre, depending on the operating frequency.

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More information

Published date: 2003
Venue - Dates: World Congress on Ultrasonics, 2003-09-07 - 2003-09-10

Identifiers

Local EPrints ID: 22541
URI: http://eprints.soton.ac.uk/id/eprint/22541
PURE UUID: 2cbf7666-7c6c-4545-87ac-1876f48b080e
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
ORCID for N.M. White: ORCID iD orcid.org/0000-0003-1532-6452
ORCID for S.P. Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 30 May 2006
Last modified: 17 Jul 2017 16:21

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Contributors

Author: M. Hill ORCID iD
Author: N.R. Harris ORCID iD
Author: R.J. Townsend
Author: N.M. White ORCID iD
Author: S.P. Beeby ORCID iD

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