Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2006-04-13
3rd International Workshop on Dynamics in Confinement, Grenoble : France (2006)
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1140/epjst/e2007-00011-5
Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal 4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenom- enon is the development of a short-range smectic order, which occurs on a very broad temperature range. It suggests in this case that quenched disorder effects add to usual finite size and surface interaction effects. We have monitored the temperature variation of the molecular dynamics of the confined fluid by incoherent quasielastic neutron scat- tering. A strongly reduced mobility is observed at the highest temperatures in the liquid phase, which suggests that the interfacial molecular dynamics is strongly hindered. A continuously increasing slowdown appears on cooling together with a progressive growth of the static correlation length
Béziel Wilfried
Frick Bernhard
Guégan Régis
Guendouz Mohammed
Lefort Ronan
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