TY - JOUR
T1 - Slow dynamics in glycerol
T2 - collective de gennes narrowing and independent angstrom motion
AU - Saito, Makina
AU - Kobayashi, Yasuhiro
AU - Masuda, Ryo
AU - Kurokuzu, Masayuki
AU - Kitao, Shinji
AU - Yoda, Yoshitaka
AU - Seto, Makoto
N1 - Funding Information:
We thank S. Kishimoto (High-Energy Accelerator Research Organization) for developing the detectors. We are also grateful to Prof. T. Kanaya (High-Energy Accelerator Research Organization) for reading the manuscript and constructive comments. The experiment was performed with the approval of the Japan Synchrotron Radiation Research Institute (proposal No. 2012B146, 2013A14457, and 2014B1061). This work was supported by JSPS KAKENHI (Grant-in-Aid for Scientific Research (S)) Grant Number 24221005 and JSPS KAKENHI (Grant-in-Aid for Young Scientists (B)) Grant Number 15K17736.
Publisher Copyright:
© 2016, Springer International Publishing Switzerland.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - 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.
AB - 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.
KW - De Gennes narrowing
KW - Glycerol
KW - Nuclear resonant scattering
KW - Time-domain interferometry
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U2 - 10.1007/s10751-016-1243-3
DO - 10.1007/s10751-016-1243-3
M3 - Article
AN - SCOPUS:84958765360
VL - 237
SP - 1
EP - 8
JO - Hyperfine Interaction
JF - Hyperfine Interaction
SN - 0304-3843
IS - 1
M1 - 22
ER -