Wavelength dependence of water microdroplet shattering with dual IR lasers and dye sensitization

Akinori Sugiyama; Atsushi Nakajima

doi:10.1515/zpch-2013-0455

Wavelength dependence of water microdroplet shattering with dual IR lasers and dye sensitization

Akinori Sugiyama, Atsushi Nakajima

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

We have used time-resolved imaging to examine the effect of incident radiation wavelength in the range 2.75-3.75 μm on the shattering of water microdroplets by single and dual lasers. Dye sensitization of microdroplets was induced by using the water-soluble dye sulforhodamine G; this enabled us to observe both the forward and backward components of fragmented droplets and splashes. Compared with employing a single IR laser, simultaneous illumination by two IR lasers can effectively compress the spatial distribution of small fragments around the absorption maximum for the OH-stretching vibration of liquid water (y=2.75-3.25 μm). Scattering and compression of the fragmented microdroplets after single and dual IR laser irradiation can be explained by conservation of momentum.

Original language	English
Pages (from-to)	459-470
Number of pages	12
Journal	Zeitschrift fur Physikalische Chemie
Volume	228
Issue number	4-5
DOIs	https://doi.org/10.1515/zpch-2013-0455
Publication status	Published - 2014 May

Keywords

Dye sensitization
IR laser
Shattering
Time-resolved imaging
Water microdroplet

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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title = "Wavelength dependence of water microdroplet shattering with dual IR lasers and dye sensitization",

abstract = "We have used time-resolved imaging to examine the effect of incident radiation wavelength in the range 2.75-3.75 μm on the shattering of water microdroplets by single and dual lasers. Dye sensitization of microdroplets was induced by using the water-soluble dye sulforhodamine G; this enabled us to observe both the forward and backward components of fragmented droplets and splashes. Compared with employing a single IR laser, simultaneous illumination by two IR lasers can effectively compress the spatial distribution of small fragments around the absorption maximum for the OH-stretching vibration of liquid water (y=2.75-3.25 μm). Scattering and compression of the fragmented microdroplets after single and dual IR laser irradiation can be explained by conservation of momentum.",

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AB - We have used time-resolved imaging to examine the effect of incident radiation wavelength in the range 2.75-3.75 μm on the shattering of water microdroplets by single and dual lasers. Dye sensitization of microdroplets was induced by using the water-soluble dye sulforhodamine G; this enabled us to observe both the forward and backward components of fragmented droplets and splashes. Compared with employing a single IR laser, simultaneous illumination by two IR lasers can effectively compress the spatial distribution of small fragments around the absorption maximum for the OH-stretching vibration of liquid water (y=2.75-3.25 μm). Scattering and compression of the fragmented microdroplets after single and dual IR laser irradiation can be explained by conservation of momentum.

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KW - Time-resolved imaging

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