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Rapid rotation of micron and submicron dielectric particles measured using optical tweezers

Abstract:

We demonstrate the use of a laser trap ('optical tweezers') and back-focal-plane position detector to measure rapid rotation in aqueous solution of single particles with sizes in the vicinity of 1 μm. Two types of rotation were measured: electrorotation of polystyrene microspheres and rotation of the flagellar motor of the bacterium Vibrio alginolyticus. In both cases, speeds in excess of 1000Hz (rev s-1) were measured. Polystyrene beads of diameter about 1 μm labelled with smaller beads were...

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Publication status:
Published

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Publisher copy:
10.1080/0950034031000069361

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, REF-Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
Journal:
JOURNAL OF MODERN OPTICS
Volume:
50
Issue:
10
Pages:
1539-1554
Publication date:
2003-07-05
DOI:
ISSN:
0950-0340
URN:
uuid:6cffa983-e246-4dc2-8e99-b25d2fa8eb40
Source identifiers:
22224
Local pid:
pubs:22224
Language:
English

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