Abstract
Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenomenon 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 scattering. 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.
| Original language | English |
|---|---|
| Pages (from-to) | 29-34 |
| Number of pages | 6 |
| Journal | European Physical Journal: Special Topics |
| Volume | 141 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2007 Feb 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
Cite this
Dynamics of 8CB confined into porous silicon probed by incoherent neutron backscattering experiments. / Guegan, Regis; Lefort, R.; Béziel, W.; Morineau, Denis; Guendouz, M.; Frick, B.
In: European Physical Journal: Special Topics, Vol. 141, No. 1, 01.02.2007, p. 29-34.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dynamics of 8CB confined into porous silicon probed by incoherent neutron backscattering experiments
AU - Guegan, Regis
AU - Lefort, R.
AU - Béziel, W.
AU - Morineau, Denis
AU - Guendouz, M.
AU - Frick, B.
PY - 2007/2/1
Y1 - 2007/2/1
N2 - Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenomenon 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 scattering. 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.
AB - Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenomenon 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 scattering. 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.
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U2 - 10.1140/epjst/e2007-00011-5
DO - 10.1140/epjst/e2007-00011-5
M3 - Article
AN - SCOPUS:34247347881
VL - 141
SP - 29
EP - 34
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
SN - 1951-6355
IS - 1
ER -