Anisotropic de Gennes Narrowing in Confined Fluids.

  title={Anisotropic de Gennes Narrowing in Confined Fluids.},
  author={Kim Nyg̊ard and Johan Buitenhuis and Matias Kagias and Konstantins Jefimovs and Federico Zontone and Yuriy Chushkin},
  journal={Physical review letters},
  volume={116 16},
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… 

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