Probing the out-of-equilibrium dynamics of driven colloids by X-ray photon correlation spectroscopy.

ABSTRACT: The high brilliance of fourth-generation synchrotron sources coupled with advanced X-ray detectors enables a wide range of dynamic studies of colloids and other soft-matter systems. In particular, the higher fraction of coherent flux provided by these new sources is a major boost for X-ray photon correlation spectroscopy (XPCS). As a result, not only can equilibrium dynamics be accessed but also relatively fast out-of-equilibrium processes can be investigated by XPCS. This article briefly recalls the statistical properties of coherent scattering and then demonstrates a case study of non-equilibrium fluctuations in a driven colloidal system. A simple example is the resuspension of colloids by vigorous shaking, where the inhomogeneous flow generates local variations in number density of part

SUBMITTER: Narayanan T 

PROVIDER: S-EPMC11957404 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature