Generation of laser-induced plasma in supercritical water and vibrational spectroscopic study of accompanying stimulated Raman scattering

Journal Article · Mon Aug 29 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3627161· OSTI ID:22027731

Yui, Hiroharu ^[1]; Tomai, Takaaki; Sawada, Masayoshi; Terashima, Kazuo ^[2]

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1. Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjyuku-ku, Tokyo 162-8601 (Japan)
2. Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8561 (Japan)

We have formed a laser-induced plasma (LIP) in supercritical water (SCW) and studied associated molecular vibrations using spectroscopic methods. The accompanying forward and backward stimulated Raman scattering (SRS) of water molecules showed anisotropic behavior at supercritical conditions (>647 K and >22.1 MPa). The Raman shift of the backward SRS indicated that attractive interactions between water molecules and excess electrons generated by the LIP were dominant in the SCW. The backward SRS spectrum provided a microscopic view of the hydration environment around an excess electron, which is useful for controlling electron-driven chemical reactions and materials processing in SCW.

• OSTI ID: 22027731
• Journal Information: Applied Physics Letters, Vol. 99, Issue 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
LASER-PRODUCED PLASMA
LASERS
MOLECULES
PLASMA PRESSURE
PLASMA PRODUCTION
PRESSURE RANGE MEGA PA
RAMAN EFFECT
SPECTRAL SHIFT
VIBRATIONAL STATES
WATER