Slow dynamics in glycerol: collective de gennes narrowing and independent angstrom motion

Makina Saito, Yasuhiro Kobayashi, Ryo Masuda, Masayuki Kurokuzu, Shinji Kitao, Yoshitaka Yoda, Makoto Seto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The slow dynamics of microscopic density correlations in supercooled glycerol was studied by time-domain interferometry using 57Fe-nuclear resonant scattering gamma rays of synchrotron radiation. The dependence of the relaxation time at 250 K on the momentum transfer q is maximum near the first peak of the static structure factor S(q) at q ∼ 15 nm −1. The q-dependent behavior of the relaxation time known as de Gennes narrowing was confirmed in glycerol. Conversely, de Gennes narrowing around the second and third peaks of S(q) at q ∼ 26 nm −1 and 54 nm −1 was not detected. The q dependence of the relaxation time was found to follow a power-law equation with power-law index of 1.9(2) in the q region well above the first peak of S(q) up to ∼ 60 nm −1, which corresponds to angstrom scale, within experimental error. This suggests that in the angstrom-scale dynamics of supercooled glycerol, independent motions dominate over collective motion.

Original languageEnglish
Article number22
Pages (from-to)1-8
Number of pages8
JournalHyperfine Interactions
Volume237
Issue number1
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Keywords

  • De Gennes narrowing
  • Glycerol
  • Nuclear resonant scattering
  • Time-domain interferometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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