Colloidal monolayer trapped near a charged wall: A synchrotron x-ray diffraction study
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| Publication date | 2008 |
| Journal | Physical Review Letters |
| Volume | Issue number | 101 | 13 |
| Pages (from-to) | 136103 |
| Number of pages | 4 |
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| Abstract | 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. |
| Document type | Article |
| Published at |
https://doi.org/10.1103/PhysRevLett.101.136103
(Final published version)
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