Structural phase transition in ultrathin films of disk-shaped molecules

Authors
Maliszewskyj, NC Mindyuk, OY Heiney, PA Josefowicz, JY Schuhmacher, P Ringsdorf, H
Citation
Nc. Maliszewskyj et al., Structural phase transition in ultrathin films of disk-shaped molecules, LIQ CRYST, 26(1), 1999, pp. 31-36
Citations number
35
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LIQUID CRYSTALS
ISSN journal
02678292 → ACNP
Volume
26
Issue
1
Year of publication
1999
Pages
31 - 36
Database
ISI
SICI code
0267-8292(199901)26:1<31:SPTIUF>2.0.ZU;2-Y
Abstract
We have used grazing-incidence X-ray diffraction and atomic force microscop y to study Langmuir-Blodgett films of 2-(3-hydroxypropyl)oxy-3,6,7,10,11-pe ntapentyloxytriphenylene, a disk-shaped molecule which also forms a bulk li quid crystalline columnar phase. Upon heating, we observe a phase transitio n from a low symmetry ordered crystalline structure to a high temperature l iquid crystal. The transition is reversible, with considerable hysteresis.