Observation of the binary coalescence and equilibration of micrometer-sized droplets of aqueous aerosol in a single-beam gradient-force optical trap. / Power, R.; Reid, J. P.; Anand, S.; McGloin, D.; Almohamedi, A.; Mistry, N. S.; Hudson, A. J.
In: Journal of Physical Chemistry A, Vol. 116, No. 35, 06.09.2012, p. 8873-8884.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Observation of the binary coalescence and equilibration of micrometer-sized droplets of aqueous aerosol in a single-beam gradient-force optical trap
A1 - Power,R.
A1 - Reid,J. P.
A1 - Anand,S.
A1 - McGloin,D.
A1 - Almohamedi,A.
A1 - Mistry,N. S.
A1 - Hudson,A. J.
AU - Power,R.
AU - Reid,J. P.
AU - Anand,S.
AU - McGloin,D.
AU - Almohamedi,A.
AU - Mistry,N. S.
AU - Hudson,A. J.
PY - 2012/9/6
Y1 - 2012/9/6
N2 - The binary coalescence of aqueous droplets has been observed in a single-beam gradient-force optical trap. By measuring the time-dependent intensity for elastic scattering of light from the trapping laser, the dynamics of binary coalescence have been examined and the time scale for equilibration of a composite droplet to ambient conditions has been determined. These data are required for modeling the agglomeration of aqueous droplets in dense sprays and atmospheric aerosol. Elastic-light scattering from optically trapped particles has not been used previously to study the time-resolved dynamics of mixing. It is shown to offer a unique opportunity to characterize the binary coalescence of aqueous droplets with radii from 1 to 6 µm. The study of this size regime, which cannot be achieved by conventional imaging methods, is critical for understanding the interactions of droplets in the environment of dense sprays. © 2012 American Chemical Society.
AB - The binary coalescence of aqueous droplets has been observed in a single-beam gradient-force optical trap. By measuring the time-dependent intensity for elastic scattering of light from the trapping laser, the dynamics of binary coalescence have been examined and the time scale for equilibration of a composite droplet to ambient conditions has been determined. These data are required for modeling the agglomeration of aqueous droplets in dense sprays and atmospheric aerosol. Elastic-light scattering from optically trapped particles has not been used previously to study the time-resolved dynamics of mixing. It is shown to offer a unique opportunity to characterize the binary coalescence of aqueous droplets with radii from 1 to 6 µm. The study of this size regime, which cannot be achieved by conventional imaging methods, is critical for understanding the interactions of droplets in the environment of dense sprays. © 2012 American Chemical Society.
KW - Ambient conditions
KW - Aqueous aerosols
KW - Aqueous droplets
KW - Conventional imaging
KW - Dense sprays
KW - Optical trap
KW - Single-beam
KW - Time-dependent
KW - Time-resolved dynamics
KW - Time-scales
KW - Trapped particle
KW - Trapping laser
UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-84865958908&md5=e6fb157015300c25e1e9e62f0ecbbc10
U2 - 10.1021/jp304929t
DO - 10.1021/jp304929t
M1 - Article
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 35
VL - 116
SP - 8873
EP - 8884
ER -