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Title: Brownian motion studies of viscoelastic colloidal gels by rotational single particle tracking

Colloidal gels have unique properties due to a complex microstructure which forms into an extended network. Although the bulk properties of colloidal gels have been studied, there has been difficulty correlating those properties with individual colloidal dynamics on the microscale due to the very high viscosity and elasticity of the material. We utilize rotational X-ray tracking (RXT) to investigate the rotational motion of component crystalline colloidal particles in a colloidal gel of alumina and decanoic acid. Our investigation has determined that the high elasticity of the bulk is echoed by a high elasticity experienced by individual colloidal particles themselves but also finds an unexpected high degree of rotational diffusion, indicating a large degree of freedom in the rotational motion of individual colloids even within a tightly bound system.
Authors:
; ;
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Published Article
Journal Name:
IUCrJ
Additional Journal Information:
Journal Name: IUCrJ Journal Volume: 1 Journal Issue: 3; Journal ID: ISSN 2052-2525
Publisher:
International Union of Crystallography (IUCr)
Sponsoring Org:
USDOE
Country of Publication:
United Kingdom
Language:
English
OSTI Identifier:
1335052

Liang, Mengning, Harder, Ross, and Robinson, Ian K. Brownian motion studies of viscoelastic colloidal gels by rotational single particle tracking. United Kingdom: N. p., Web. doi:10.1107/S2052252514006022.
Liang, Mengning, Harder, Ross, & Robinson, Ian K. Brownian motion studies of viscoelastic colloidal gels by rotational single particle tracking. United Kingdom. doi:10.1107/S2052252514006022.
Liang, Mengning, Harder, Ross, and Robinson, Ian K. 2014. "Brownian motion studies of viscoelastic colloidal gels by rotational single particle tracking". United Kingdom. doi:10.1107/S2052252514006022.
@article{osti_1335052,
title = {Brownian motion studies of viscoelastic colloidal gels by rotational single particle tracking},
author = {Liang, Mengning and Harder, Ross and Robinson, Ian K.},
abstractNote = {Colloidal gels have unique properties due to a complex microstructure which forms into an extended network. Although the bulk properties of colloidal gels have been studied, there has been difficulty correlating those properties with individual colloidal dynamics on the microscale due to the very high viscosity and elasticity of the material. We utilize rotational X-ray tracking (RXT) to investigate the rotational motion of component crystalline colloidal particles in a colloidal gel of alumina and decanoic acid. Our investigation has determined that the high elasticity of the bulk is echoed by a high elasticity experienced by individual colloidal particles themselves but also finds an unexpected high degree of rotational diffusion, indicating a large degree of freedom in the rotational motion of individual colloids even within a tightly bound system.},
doi = {10.1107/S2052252514006022},
journal = {IUCrJ},
number = 3,
volume = 1,
place = {United Kingdom},
year = {2014},
month = {4}
}