Colloidal monolayer trapped near a charged wall: a synchrotron x-ray diffraction study.
- Satapathy DK Research Department of Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. dillip.satapathy@psi.ch
- Bunk O
- Jefimovs K
- Nygård K
- Guo H
- Diaz A
- Perret E
- Pfeiffer F
- David C
- Wegdam GH
- van der Veen JF
- 2008-10-15
Published in:
- Physical review letters. - 2008
English
Using x-ray diffraction from microfluidic channel arrays, we have determined concentration profiles of charge-stabilized silica colloids (radius 60+/-2 nm) confined between two like-charged dielectric walls at a few hundred nanometer distance. In solutions of very low ionic strength, strongly repulsive Coulomb interactions drive the colloids toward the central region between the walls. The addition of a small quantity of salt ions (0.2 mM) causes a dense colloidal monolayer to be trapped near the walls.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.101.136103
- PMID 18851466
- Persistent URL
- https://sonar.ch/global/documents/711
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