Depletion-induced structure and dynamics in bimodal colloidal suspensions.

Journal Article · Tue May 03 00:00:00 EDT 2011 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.106.188301· OSTI ID:1019246

Sikorski, M; Sandy, A R; Narayanan, S ^[1]

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1. X-Ray Science Division

Combined small angle x-ray scattering and x-ray photon correlation spectroscopy studies of moderately concentrated bimodal hard-sphere colloidal suspensions in the fluid phase show that depletion-induced demixing introduces spatially heterogeneous dynamics with two distinct time scales. The adhesive nature, as well as the mobility, of the large particles is determined by the level of interaction within the monomodal domains. This interaction is driven by osmotic forces, which are governed by the relative concentration of the constituents.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1019246
• Report Number(s): ANL/XSD/JA-69560; TRN: US1103585
• Journal Information: Phys. Rev. Lett., Vol. 106, Issue 18 ; May 3, 2011
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ADHESIVES
PHOTONS
SCATTERING
SPECTROSCOPY