Abstract
Using X-ray photon correlation spectroscopy we have measured the rotational modes of concentrated
charged gibbsite platelets in the isotropic regime. This has been done by analyzing the data qualitatively
using available theories for non-interacting systems. The relaxation spectra do not follow the
same pattern as for spherical particles at larger wave vectors. It will be shown that this deviation from
the behavior of spherical systems arises from the influence of the rotational modes. In addition, in the
isotropic state a pre-transitional peak in the static q-dependent intensity at large q values is discussed.
We suggest that this peak originates from a strong local alignment between platelets before the actual
phase transition takes place.
| Original language | English |
|---|---|
| Article number | 084905 |
| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | Journal of Chemical Physics |
| Volume | 139 |
| DOIs | |
| Publication status | Published - 2013 |