Attractive potential between confined colloids at low ionic strength

Journal Article · Mon Jul 11 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.356· OSTI ID:7166589

Kepler, G M; Fraden, S ^[1]

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1. The Martin Fisher School of Physics, Brandeis University, Waltham, Massachusetts 02254 (United States)

Digital video microscopy is used to locate the positions of 1.27 [mu]m diameter polystyrene spheres suspended in low ionic strength water and confined between two glass plates. A method is developed to obtain the pair potential of the colloidal particles from measurements of the pair-correlation function of both dilute and moderately concentrated dispersions. We find that the measured pair potential has an attractive component much greater than predicted by the Derjaguin-Landau-Verwey-Overbeek theory of nonconfined colloids and suggest that the confining plates are responsible for the observed deviations from theory.

• DOE Contract Number: FG02-84ER45084
• OSTI ID: 7166589
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:2; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
COLLOIDS
CONFINEMENT
DIGITAL SYSTEMS
DISPERSIONS
ELECTROLYTES
GLASS
MAGNETIC STORAGE DEVICES
MAGNETIC TAPES
MATERIALS
MEMORY DEVICES
MICROSCOPY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PLATES
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
POTENTIALS
SPHERES
SYNTHETIC MATERIALS
VIDEO TAPES