Colloids as model systems for condensed matter : investigation of structural and dynamical properties of colloidal systems using digital video microscopy and optical tweezers

Jörg Baumgartl
We use colloids as model systems for condensed matter in four independent studies employing charged-stabilized colloidal suspensions, optical tweezers and digital video microscopy. In charged colloidal suspensions, particles interact via a repulsive screened Coulomb potential with the screening length determined through the concentration of salt ions. Optical tweezers refer to strong laser-intensity fields which allow trapping of dielectric colloids in regions of maximum intensity. We use optical tweezers to induce extended two-dimensional (2D) substrates by...
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