Raman spectroscopy of reaction fields induced by plasma in supercritical CO{sub 2}

Journal Article · Mon Apr 13 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3116622· OSTI ID:21294010

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

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1. Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8561 (Japan)
2. Department of Chemistry, Faculty of Science, Tokyo University of Science, Funagawaramachi 12, Ichigaya, Shinjyuku-ku, Tokyo 162-0826 (Japan)

The characteristic microstructures of supercritical fluids, such as density fluctuation near the critical point, in reaction fields induced by low-temperature plasma were investigated by using Raman spectroscopy. It was found that the decrease in the density of CO{sub 2} during plasma generation was less than 0.02 g/cm{sup 3} (critical density of CO{sub 2}:0.467 g/cm{sup 3}), when compared to the decrease in density of pure CO{sub 2} for a wide pressure range from gaseous to supercritical conditions. Moreover, it was experimentally verified that the density fluctuation observed near the critical point persists in the reaction field.

• OSTI ID: 21294010
• Journal Information: Applied Physics Letters, Vol. 94, Issue 15; Other Information: DOI: 10.1063/1.3116622; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON DIOXIDE
MICROSTRUCTURE
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PRESSURE RANGE
RAMAN SPECTRA
RAMAN SPECTROSCOPY