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  -