Investigation of the dynamics of colloids in bulk can be hindered by issues such as multiple scattering and sample opacity. These challenges are exacerbated when dealing with inorganic materials. In this study, we employed a model system of Akaganeite colloidal rods to assess three leading dynamics measurement techniques: 3D -(depolarized) dynamic light scattering (3D-(D)DLS), polarized -differential dynamic microscopy (P-DDM), and x-ray photon correlation spectroscopy (XPCS). Our analysis revealed that the translational and rotational diffusion coefficients captured by these methods show a remarkable alignment. Additionally, by examining the q -ranges and maximum volume fractions for each approach, we offer insights into the best technique for investigating the dynamics of anisotropic systems at the colloidal scale.

Dynamics of anisotropic colloidal systems: What to choose, DLS, DDM or XPCS? / M. Arif Kamal, M. Brizioli, T. Zinn, T. Narayanan, R. Cerbino, F. Giavazzi, A. Pal. - 660:(2024 Apr 15), pp. 314-320. [10.1016/j.jcis.2023.12.163]

Dynamics of anisotropic colloidal systems: What to choose, DLS, DDM or XPCS?

M. Brizioli
Secondo
;
R. Cerbino;F. Giavazzi
Penultimo
;
2024

Abstract

Investigation of the dynamics of colloids in bulk can be hindered by issues such as multiple scattering and sample opacity. These challenges are exacerbated when dealing with inorganic materials. In this study, we employed a model system of Akaganeite colloidal rods to assess three leading dynamics measurement techniques: 3D -(depolarized) dynamic light scattering (3D-(D)DLS), polarized -differential dynamic microscopy (P-DDM), and x-ray photon correlation spectroscopy (XPCS). Our analysis revealed that the translational and rotational diffusion coefficients captured by these methods show a remarkable alignment. Additionally, by examining the q -ranges and maximum volume fractions for each approach, we offer insights into the best technique for investigating the dynamics of anisotropic systems at the colloidal scale.
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
   European infrastructure for spectroscopy, scattering and imaging of soft matter
   EUSMI
   European Commission
   Horizon 2020 Framework Programme
   731019
15-apr-2024
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1038189
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