Nonphotochemical, polarization-dependent, laser-induced nucleation in supersaturated aqueous urea solutions

Bruce Garetz, J. E. Aber, N. L. Goddard, R. G. Young, A. S. Myerson

Research output: Contribution to journalArticle

Abstract

We report a new photophysical phenomenon in which 1.06 μm pulses from a Q-switched Nd:YAG laser induce crystallization in supersaturated solutions of urea in water. Because the solutions are transparent at the incident wavelength, a photochemical mechanism is unlikely. The needle-shaped crystals that initially form tend to be aligned parallel to the electric field vector of the light, suggesting a Kerr-like field-induced alignment of urea molecules that aids in organizing prenucleating clusters. The effect has application to pump-probe nucleation studies and to clean nucleation in sealed systems.

Original languageEnglish (US)
Pages (from-to)3475-3476
Number of pages2
JournalPhysical Review Letters
Volume77
Issue number16
StatePublished - 1996

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ureas
nucleation
organizing
Q switched lasers
polarization
needles
lasers
YAG lasers
alignment
crystallization
pumps
electric fields
probes
pulses
wavelengths
water
crystals
molecules

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nonphotochemical, polarization-dependent, laser-induced nucleation in supersaturated aqueous urea solutions. / Garetz, Bruce; Aber, J. E.; Goddard, N. L.; Young, R. G.; Myerson, A. S.

In: Physical Review Letters, Vol. 77, No. 16, 1996, p. 3475-3476.

Research output: Contribution to journalArticle

Garetz, Bruce ; Aber, J. E. ; Goddard, N. L. ; Young, R. G. ; Myerson, A. S. / Nonphotochemical, polarization-dependent, laser-induced nucleation in supersaturated aqueous urea solutions. In: Physical Review Letters. 1996 ; Vol. 77, No. 16. pp. 3475-3476.
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