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Suzuki, Satoru; Kawamura, Katsuyuki*
JNC TN8400 2001-005, 41 Pages, 2001/04
A correlation between molecular structure and a vibrational spectrum of interlayer water in Na-smectite was investigated by means of Molecular Dymamics (MDs) simulations. Detailed comparison of simulation results with IR spectroscopic observations for the water-smectite system indicated good agreement. Internal vibrational spectra of water were obtained by the Fourier transformation of velocty auto-correlation function of hydrogen atom. A stretching vibrational spectrum of interlayer water consisted of a broad band with a peak top around 3400cm and a sharp peak around 3650 to 3700cm. The fomer broad band was assigned to O-H vibrations between water molecules as bulk water, while the latter band was attributed to O-H ones oriented to siloxane surface through hydrogen bonding. The hydrogen bond distance, determined as the shortest O-O distance by the radial distribution function (RDF), revealed that hydrogen bond distance between water and siloxane surface (O-O 3.0 -O = ca. 2.8 AA ). These results suggested that interaction between water molecule and siloxane surface weaker than that between water molecules, although they were forced to be oriented.
Tamada, Masao; Koshikawa, Hiroshi; Suwa, Takeshi; Yoshioka, Terufumi*; Usui, Hiroaki*; Sato, H.*
Polymer, 41(15), p.5661 - 5667, 2000/07
Times Cited Count:17 Percentile:52.1(Polymer Science)no abstracts in English
Tamada, Masao; Omichi, Hideki; *
Thin Solid Films, 260, p.168 - 173, 1995/00
Times Cited Count:16 Percentile:68.01(Materials Science, Multidisciplinary)no abstracts in English
Sazarashi, Masami*; Ikeda, Yasuhisa*; Kumagai, Mikio*
PNC TJ1564 93-002, 23 Pages, 1993/02
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