Collective dynamics in dispersions of anisometric pigment particles

May, Kathrin; Stannarius, Ralf; Kang, Kyongok; Challa, Pavan Kumar; Sprunt, Samuel; Jakli, Antal; Klein, Susanne; Eremin, Alexey

Abstract

© 2018 Elsevier B.V. Dynamics of suspensions of solid rodlike pigment particles in a non-polar solvent were studied in a concentration range from the isotropic up to the orientationally ordered nematic-like phase. Using dynamic light scattering and gradient recovery measurements, we studied the rotational and translational diffusion coefficients. We demonstrate that the translational diffusion coefficient in this system is increasing with increasing concentration of the pigment particles in the vicinity of the transition into an ordered phase. This unexpected behaviour can be attributed to the collective interactions between the particles and the alignment effects.

• Journal Article Type: Article
• Acceptance Date: Jan 29, 2018
• Online Publication Date: Feb 2, 2018
• Publication Date: Oct 1, 2018
• Deposit Date: Feb 23, 2018
• Publicly Available Date: Feb 2, 2019
• Journal: Journal of Molecular Liquids
• Print ISSN: 0167-7322
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 267
• Pages: 322-329
• DOI: https://doi.org/10.1016/j.molliq.2018.01.172
• Keywords: anisometric colloids, dynamics, di�usion, pigments
• Public URL: https://uwe-repository.worktribe.com/output/859479
• Publisher URL: https://doi.org/10.1016/j.molliq.2018.01.172
• Additional Information: Additional Information : This is the author's accepted manuscript. The final published version is available here: https://doi.org/10.1016/j.molliq.2018.01.172.
• Contract Date: Feb 23, 2018