Picoliter rheology of gaseous media using a rotating optically trapped birefringent microparticle

Yoshihiko Arita, Andrew W. McKinley, Michael Mazilu, Halina Rubinsztein-Dunlop, Kishan Dholakia

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

An optically trapped birefringent microparticle is rotated by a circularly polarized beam in a confined gaseous medium. By recording the terminal rotation velocity and the change in polarization of the incident trapping beam, we determine the viscosity by probing a picoliter volume of air, carbon dioxide, and argon in the vicinity of the microparticle. We also characterize the optical force acting on a trapped particle in air using the generalized Lorenz-Mie theory taking into account the aberrations present. This opens up a new potential application of optical tweezers for the accurate measurement of gas viscosity in confined geometries.

Original languageEnglish
Pages (from-to)8855-8858
Number of pages4
JournalAnalytical Chemistry
Volume83
Issue number23
DOIs
Publication statusPublished - 2011 Dec 1

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Rheology
Viscosity of gases
Optical tweezers
Argon
Air
Aberrations
Carbon Dioxide
Viscosity
Polarization
Geometry

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Arita, Yoshihiko ; McKinley, Andrew W. ; Mazilu, Michael ; Rubinsztein-Dunlop, Halina ; Dholakia, Kishan. / Picoliter rheology of gaseous media using a rotating optically trapped birefringent microparticle. In: Analytical Chemistry. 2011 ; Vol. 83, No. 23. pp. 8855-8858.
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Picoliter rheology of gaseous media using a rotating optically trapped birefringent microparticle. / Arita, Yoshihiko; McKinley, Andrew W.; Mazilu, Michael; Rubinsztein-Dunlop, Halina; Dholakia, Kishan.

In: Analytical Chemistry, Vol. 83, No. 23, 01.12.2011, p. 8855-8858.

Research output: Contribution to journalArticle

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