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  4. Rich polymorphism of a rod-like liquid crystal (8CB) confined in two types of unidirectional nanopores
 
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Rich polymorphism of a rod-like liquid crystal (8CB) confined in two types of unidirectional nanopores

Publikationstyp
Journal Article
Date Issued
2008-05-29
Sprache
English
Author(s)
Guégan, Régis  
Morineau, Denis  
Lefort, Ronan  
Béziel, Wilfried  
Guendouz, Mohammed  
Noirez, Laurence  
Henschel, Anke  
Huber, Patrick  orcid-logo
TORE-URI
http://hdl.handle.net/11420/12821
Journal
The European physical journal E  
Volume
26
Issue
3
Start Page
261
End Page
273
Citation
European Physical Journal E 26 (3): 261-273 (2008-07-01)
Publisher DOI
10.1140/epje/i2007-10323-0
Scopus ID
2-s2.0-47749097512
PubMed ID
18509593
Publisher
Springer
We present a neutron and X-rays scattering study of the phase transitions of 4-n-octyl-4' -cyanobiphenyl (8CB) confined in unidirectional nanopores of porous alumina and porous silicon (PSi) membranes with an average diameter of 30nm. Spatial confinement reveals a rich polymorphism, with at least four different low temperature phases in addition to the smectic A phase. The structural study as a function of thermal treatments and conditions of spatial confinement allows us to get insights into the formation of these phases and their relative stability. It gives the first description of the complete phase behavior of 8CB confined in PSi and provides a direct comparison with results obtained in bulk conditions and in similar geometric conditions of confinement but with reduced quenched disorder effects using alumina anopore membranes.
DDC Class
530: Physik
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