This title appears in the Scientific Report :
2016
Please use the identifier:
http://hdl.handle.net/2128/10426 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.116.167801 in citations.
Anisotropic de Gennes Narrowing in Confined Fluids
Anisotropic de Gennes Narrowing in Confined Fluids
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...
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Personal Name(s): | Nygård, Kim (Corresponding author) |
---|---|
Buitenhuis, Johan / Kagias, Matias / Jefimovs, Konstantins / Zontone, Federico / Chushkin, Yuriy | |
Contributing Institute: |
Weiche Materie; ICS-3 |
Published in: | Physical review letters, 116 (2016) 16, S. 167801 |
Imprint: |
College Park, Md.
APS
2016
|
PubMed ID: |
27152823 |
DOI: |
10.1103/PhysRevLett.116.167801 |
Document Type: |
Journal Article |
Research Program: |
Functional Macromolecules and Complexes |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.116.167801 in citations.
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. |