Relaxation Dynamics of Colloidal Particles at Liquid Interfaces

DSpace/Manakin Repository

Relaxation Dynamics of Colloidal Particles at Liquid Interfaces

Citable link to this page

 

 
Title: Relaxation Dynamics of Colloidal Particles at Liquid Interfaces
Author: Wang, Anna; Kaz, David M.; McGorty, Ryan; Manoharan, Vinothan N.

Note: Order does not necessarily reflect citation order of authors.

Citation: Wang, Anna, David M. Kaz, Ryan McGorty, and Vinothan N. Manoharan. 2013. Relaxation Dynamics of Colloidal Particles at Liquid Interfaces. In Proceedings of the 4th International Symposium on Slow Dynamics in Complex Systems (AIP), Sendai, Japan, December 2-7, 2012, AIP Conf. Proc. 1518: 336-343. doi: 10.1063/1.4794594
Full Text & Related Files:
Abstract: We study the dynamics of colloidal particles as they approach and breach a water-oil interface. We use a fast 3D imaging technique, digital holographic microscopy, to track particles with 2 nm precision and sub-millisecond time resolution. We find that polystyrene particles dispersed in water or water-glycerol mixtures relax logarithmically with time after breaching the interface and do not reach equilibrium on experimental timescales. By contrast, decane-dispersed PMMA particles show fast dynamics and reach a steady-state height within milliseconds. We attribute the difference to the surface properties of the particles. We also probe the dependence of the relaxation rate on surface charge by studying carboxyl-functionalized particles under varying acid concentrations. We conclude that the slow relaxation may be due to contact-line pinning on topographical defects rather than surface charges.
Published Version: doi:10.1063/1.4794594
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:24902730
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters