Molecular dynamics of a short-range ordered smectic phase nanoconfined in porous silicon

R. Guégan*, D. Morineau, R. Lefort, A. Moréac, W. Béziel, M. Guendouz, J. M. Zanotti, B. Frick

*この研究の対応する著者

研究成果: Article査読

39 被引用数 (Scopus)

抄録

4- n -octyl-4-cyanobiphenyl has been recently shown to display an unusual sequence of phases when confined into porous silicon (PSi). The gradual increase of oriented short-range smectic (SRS) correlations in place of a phase transition has been interpreted as a consequence of the anisotropic quenched disorder induced by confinement in PSi. Combining two quasielastic neutron scattering experiments with complementary energy resolutions, the authors present the first investigation of the individual molecular dynamics of this system. A large reduction of the molecular dynamics is observed in the confined liquid phase, as a direct consequence of the boundary conditions imposed by the confinement. Temperature fixed window scans reveal a continuous glasslike reduction of the molecular dynamics of the confined liquid and SRS phases on cooling down to 250 K, where a solidlike behavior is finally reached by a two-step crystallization process.

本文言語English
論文番号064902
ジャーナルJournal of Chemical Physics
126
6
DOI
出版ステータスPublished - 2007
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学一般
  • 物理化学および理論化学

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