Structure and dynamics of two-dimensional colloidal systems in circular cavities

Publikationstyp: Zeitschriftenartikel
URI (zitierfähiger Link): http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-28364
Autor/innen: Bubeck, Ralf; Leiderer, Paul; Bechinger, Clemens
Erscheinungsjahr: 2001
Erschienen in: Progress in Colloid and Polymer Science ; 118 (2001). - S. 73-76
DOI (zitierfähiger Link): https://dx.doi.org/10.1007/3-540-45725-9_16
Zusammenfassung:
The properties of 2D colloidal crystals have been widely investigated over the last 20 years. Recently, it has been recognized that colloids are also useful for the investigation of systems comprised of only a few particles. We study the melting behaviour of a finite number (N < 30) of paramagnetic colloidal spheres (b = 4.5 mm) in 2D circular cavities. By applying a magnetic field, B, the interaction strength between the particles is varied. At high B, i.e. strong dipole interaction, the particles are arranged in a highly ordered shell-like structure. With decreasing B we observe a loss of angular order between adjacent shells. Upon further reduction of the external field, however, different scenarios are observed. For cavities with hard-wall confinement potentials. In both cases the system melts completely for small magnetic fields.
Fachgebiet (DDC): 530 Physik
Schlagwörter: colloids, two-dimensional, two-dimensional freezing, phase transitions, classical atoms
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BUBECK, Ralf, Paul LEIDERER, Clemens BECHINGER, 2001. Structure and dynamics of two-dimensional colloidal systems in circular cavities. In: Progress in Colloid and Polymer Science. 118, pp. 73-76

@article{Bubeck2001Struc-9525, title={Structure and dynamics of two-dimensional colloidal systems in circular cavities}, year={2001}, doi={10.1007/3-540-45725-9_16}, volume={118}, journal={Progress in Colloid and Polymer Science}, pages={73--76}, author={Bubeck, Ralf and Leiderer, Paul and Bechinger, Clemens} }

First publ. in: Progress in Colloid and Polymer Science 118 (2001), pp. 73-76 Bechinger, Clemens Leiderer, Paul eng 2001 2011-03-24T17:57:42Z Bubeck, Ralf Leiderer, Paul 2011-03-24T17:57:42Z The properties of 2D colloidal crystals have been widely investigated over the last 20 years. Recently, it has been recognized that colloids are also useful for the investigation of systems comprised of only a few particles. We study the melting behaviour of a finite number (N < 30) of paramagnetic colloidal spheres (b = 4.5 mm) in 2D circular cavities. By applying a magnetic field, B, the interaction strength between the particles is varied. At high B, i.e. strong dipole interaction, the particles are arranged in a highly ordered shell-like structure. With decreasing B we observe a loss of angular order between adjacent shells. Upon further reduction of the external field, however, different scenarios are observed. For cavities with hard-wall confinement potentials. In both cases the system melts completely for small magnetic fields. Bubeck, Ralf Structure and dynamics of two-dimensional colloidal systems in circular cavities application/pdf deposit-license Bechinger, Clemens

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