Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-03-04
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
We report on pair interaction measurements in charged colloidal systems in confined and unconfined geometries by means of optical microscopy. At very small particle distances we observe minute distortions in the optical images which can lead to artifacts in the pair potentials as derived by digital video microscopy. In particular, these distortions can pretend long-range attractions observed in charged colloidal suspensions.
Arauz-Lara Jose Luis
Baumgartl Joerg
Bechinger Clemens
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