Record Details

Title:
Heterogeneous and Anisotropic Dynamics of a 2D Gel
Affiliation(s):
XFEL.EU staff, Other
Topic:
Scientific area:
Abstract:
We report x-ray photon correlation spectroscopy (XPCS) results on bidimensional (2D) gels formed by a Langmuir monolayer of gold nanoparticles. The system allows an experimental determination of the fourth order time correlation function, which is compared to the usual second order correlation function and to the mechanical response measured on macroscopic scale. The observed dynamics is anisotropic, heterogeneous and superdiffusive on the nanoscale. Different time scales, associated with fast heterogeneous dynamics inside 2D cages and slower motion of larger parts of the film, can be identified from the correlation functions. The XPCS results are discussed in view of other experimental results and models of three-dimensional gel dynamics.
Imprint:
2012
Journal Information:
Phys. Rev. Lett. , 108, 105701 (2012)
External related publications:
Language(s):
English


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 Record created 2017-12-21, last modified 2017-12-21

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