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Acoustic trapping in bubble-bounded micro-cavities

Acoustic trapping in bubble-bounded micro-cavities
Acoustic trapping in bubble-bounded micro-cavities
We present a method for controllably producing longitudinal acoustic trapping sites inside microfluidic channels. Air bubbles are injected into a micro-capillary to create bubble-bounded ‘micro-cavities’. A cavity mode is formed that shows controlled longitudinal acoustic trapping between the two air/water interfaces along with the levitation to the centre of the channel that one would expect from a lower order lateral mode. 7 µm and 10 µm microspheres are trapped at the discrete acoustic trapping sites in these micro-cavities. We show this for several lengths of micro-cavity.
22-26
O’Mahoney, P.
8c8401e7-34b8-4cbc-8f09-04a751153b37
McDougall, C.
88e88afe-f877-4d43-8c3e-156e669f6e6e
Glynne-Jones, P.
6ca3fcbc-14db-4af9-83e2-cf7c8b91ef0d
MacDonald, M.P.
ccef2019-b03c-4e54-a747-b1839e3bacee
O’Mahoney, P.
8c8401e7-34b8-4cbc-8f09-04a751153b37
McDougall, C.
88e88afe-f877-4d43-8c3e-156e669f6e6e
Glynne-Jones, P.
6ca3fcbc-14db-4af9-83e2-cf7c8b91ef0d
MacDonald, M.P.
ccef2019-b03c-4e54-a747-b1839e3bacee

O’Mahoney, P., McDougall, C., Glynne-Jones, P. and MacDonald, M.P. (2016) Acoustic trapping in bubble-bounded micro-cavities. Optofluidics, Microfluidics and Nanofluidics, 3 (1), 22-26. (doi:10.1515/optof-2016-0003).

Record type: Article

Abstract

We present a method for controllably producing longitudinal acoustic trapping sites inside microfluidic channels. Air bubbles are injected into a micro-capillary to create bubble-bounded ‘micro-cavities’. A cavity mode is formed that shows controlled longitudinal acoustic trapping between the two air/water interfaces along with the levitation to the centre of the channel that one would expect from a lower order lateral mode. 7 µm and 10 µm microspheres are trapped at the discrete acoustic trapping sites in these micro-cavities. We show this for several lengths of micro-cavity.

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More information

Accepted/In Press date: 2 November 2016
Published date: 5 December 2016
Organisations: Mechatronics

Identifiers

Local EPrints ID: 403944
URI: http://eprints.soton.ac.uk/id/eprint/403944
PURE UUID: b8d95a9e-7813-47ee-b61d-74d796ea8eb9
ORCID for P. Glynne-Jones: ORCID iD orcid.org/0000-0001-5684-3953

Catalogue record

Date deposited: 16 Dec 2016 14:01
Last modified: 07 Oct 2020 01:43

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