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.
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Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
Townsend, R.J.
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White, N.M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Beeby, S.P.
ba565001-2812-4300-89f1-fe5a437ecb0d
7 September 2003
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.
World Congress on Ultrasonics, Paris, France.
07 - 10 Sep 2003.
.
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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Published date: 7 September 2003
Venue - Dates:
World Congress on Ultrasonics, Paris, France, 2003-09-07 - 2003-09-10
Organisations:
EEE
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Local EPrints ID: 268780
URI: http://eprints.soton.ac.uk/id/eprint/268780
PURE UUID: 062a611a-ddf4-48c8-a057-ac2d5b5121ca
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Date deposited: 26 Mar 2010 18:04
Last modified: 07 Dec 2024 02:35
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