TY  - JOUR
AU  - Nygård, Kim
AU  - Buitenhuis, Johan
AU  - Kagias, Matias
AU  - Jefimovs, Konstantins
AU  - Zontone, Federico
AU  - Chushkin, Yuriy
TI  - Anisotropic de Gennes Narrowing in Confined Fluids
JO  - Physical review letters
VL  - 116
IS  - 16
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2016-02395
SP  - 167801
PY  - 2016
AB  - The collective diffusion of dense fluids in spatial confinement is studied by combining high-energy (21 keV) x-ray photon correlation spectroscopy and small-angle x-ray scattering from colloid-filled microfluidic channels. We find the structural relaxation in confinement to be slower compared to the bulk. The collective dynamics is wave vector dependent, akin to the de Gennes narrowing typically observed in bulk fluids. However, in stark contrast to the bulk, the structure factor and de Gennes narrowing in confinement are anisotropic. These experimental observations are essential in order to develop a microscopic theoretical description of collective diffusion of dense fluids in confined geometries.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000374559700014
C6  - pmid:27152823
DO  - DOI:10.1103/PhysRevLett.116.167801
UR  - https://juser.fz-juelich.de/record/808778
ER  -