NDLI: Water expansion dynamics after pulsed IR laser heating.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hobley, Jonathan Kuge, Yutaka Gorelik, Sergey Kasuya, Motohiro Hatanaka, Koji Kajimoto, Shinji Fukumura, Hiroshi
Description	Country affiliation: Singapore Author Affiliation: Hobley J ( Institute of Materials Research and Engineering A STAR, Agency for Science, Technology and Research, Singapore. hobleyj@imre.a-star.edu.sg)
Abstract	A nanosecond pulsed IR (1.9 microm) laser rapidly heated water, in an open vessel, to temperatures well below the boiling point. The subsequent dynamics of volume expansion were monitored using time-resolved interferometry in order to measure the increase in the water level in the heated area. The water expanded at less than the speed of sound, taking just less than 100 ns to increase its height by approximately 500 nm at surface temperature jumps of 20 K. The initial expansion was followed by an apparent contraction and then a re-expansion. The first expansion phase occurred more slowly than the timescale for bulk H-bond re-structuring of the water, as determined from vibrational bands in the Raman spectra, and represents the limit to the rate at which the overpressure caused by sudden heating can be released. The second phase of the expansion was caused by hydrodynamic effects and is accompanied by morphological changes resulting in light scattering as well as droplet spallation.
File Format	HTM / HTML
ISSN	14639076
Issue Number	34
Journal	Physical Chemistry Chemical Physics
Volume Number	10
e-ISSN	14639084
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2008-09-14
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Physics Discipline Biophysics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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