Bound Pairs: Direct Evidence for Long-range Attraction between Like-Charged Colloids
arXiv:0711.2883 · doi:10.1016/j.ssc.2008.06.026
Abstract
We report observations of stable bound pairs in very dilute deionized aqueous suspensions of highly charged polystyrene colloidal particles, with monovalent counterions, using a confocal laser scanning microscope. Through an analysis of several thousands of time series of confocal images recorded deep inside the bulk suspension, we find that the measured pair-potential, U(r) has a long-range attractive component with well depths larger than the thermal energy. These observations provide a direct and unequivocal evidence for the existence of long-range attraction in U(r) of like-charged colloidal particles.
8 pages, 4 figures, submitted to Phys. Rev. Lett
References in corpus (11)
- Electrostatic correlations: from Plasma to Biology
- Electrostatic Interactions in Strongly-Coupled Soft Matter
- Like-charge attraction through hydrodynamic interaction
- Strong Attraction between Charged Spheres due to Metastable Ionized States
- Image charges in spherical geometry: Application to colloidal systems
- Colloidal Electrostatic Interactions Near a Conducting Surface
- Charge Oscillations in Debye-Hueckel Theory
- Attraction between like-charged colloidal particles induced by a surface a density - functional analysis
- Anomalous interactions in confined charge-stabilized colloid
- Long range polarization attraction between two different likely charged macroions
- Aging and ultra-slow equilibration in concentrated colloidal hard spheres
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- Studies on electrostatic interactions of colloidal particles under two-dimensional confinement