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 language | English |
|---|---|
| Pages (from-to) | 8855-8858 |
| Number of pages | 4 |
| Journal | Analytical Chemistry |
| Volume | 83 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 2011 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Analytical Chemistry
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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 journal › Article
TY - JOUR
T1 - Picoliter rheology of gaseous media using a rotating optically trapped birefringent microparticle
AU - Arita, Yoshihiko
AU - McKinley, Andrew W.
AU - Mazilu, Michael
AU - Rubinsztein-Dunlop, Halina
AU - Dholakia, Kishan
PY - 2011/12/1
Y1 - 2011/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=82555187424&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=82555187424&partnerID=8YFLogxK
U2 - 10.1021/ac2024365
DO - 10.1021/ac2024365
M3 - Article
C2 - 22029267
AN - SCOPUS:82555187424
VL - 83
SP - 8855
EP - 8858
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 23
ER -