TY - JOUR
T1 - Confinement for More Space
T2 - A Larger Free Volume and Enhanced Glassy Dynamics of 2-Ethyl-1-hexanol in Nanopores
AU - Kipnusu, Wycliffe K.
AU - Elsayed, Mohamed
AU - Kossack, Wilhelm
AU - Pawlus, Sebastian
AU - Adrjanowicz, Karolina
AU - Tress, Martin
AU - Mapesa, Emmanuel U.
AU - Krause-Rehberg, Reinhard
AU - Kaminski, Kamil
AU - Kremer, Friedrich
PY - 2015
Y1 - 2015
N2 - Broadband dielectric spectroscopy and positron annihilation lifetime spectroscopy are employed to study the molecular dynamics and effective free volume of 2-ethyl-1-hexanol (2E1H) in the bulk state and when confined in unidirectional nanopores with average diameters of 4, 6, and 8 nm. Enhanced α-relaxations with decreasing pore diameters closer to the calorimetric glass-transition temperature (Tg) correlate with the increase in the effective free volume. This indicates that the glassy dynamics of 2D constrained 2E1H is mainly controlled by density variation.
AB - Broadband dielectric spectroscopy and positron annihilation lifetime spectroscopy are employed to study the molecular dynamics and effective free volume of 2-ethyl-1-hexanol (2E1H) in the bulk state and when confined in unidirectional nanopores with average diameters of 4, 6, and 8 nm. Enhanced α-relaxations with decreasing pore diameters closer to the calorimetric glass-transition temperature (Tg) correlate with the increase in the effective free volume. This indicates that the glassy dynamics of 2D constrained 2E1H is mainly controlled by density variation.
U2 - 10.1021/acs.jpclett.5b01533
DO - 10.1021/acs.jpclett.5b01533
M3 - Journal article
SN - 1948-7185
VL - 6
SP - 3708
EP - 3712
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 18
ER -