| Title: |
Morphology of open films of discotic hexagonal columnar liquid crystals as probed by grazing incidence X-ray diffraction |
| Authors: |
Grelet, Eric; Dardel, Sébastien; Bock, Harald; Goldmann, M.; Lacaze, Emmanuelle; Nallet, Frédéric |
| Contributors: |
Centre de recherches Paul Pascal (CRPP); Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Université Sciences et Technologies - Bordeaux 1 (UB); Institut des Nanosciences de Paris (INSP); Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS); Université Paris Descartes - Paris 5 (UPD5) |
| Source: |
ISSN: 1292-8941 ; EISSN: 1292-895X. |
| Publisher Information: |
CCSD; EPJ / Springer Nature |
| Publication Year: |
2010 |
| Subject Terms: |
Columnar liquid crystals; X-ray diffraction; [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]; [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] |
| Description: |
7 pages ; International audience ; The structure and the orientation of thermotropic hexagonal columnar liquid crystals are studied by grazing incidence X-ray diffraction (GIXD) for different discotic compounds in the geometry of open supported thin films. Whatever the film deposition mode (either spin-coating or vacuum evaporation) and the film thickness, a degenerate planar alignment with the liquid crystalline columns parallel to the substrate is found. However, if a specific thermal process is applied to the liquid crystal film, homeotropic anchoring (columns normal to the interface) can be stabilized in a metastable state. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1140/epje/i2010-10586-2 |
| Availability: |
https://hal.science/hal-00482771; https://doi.org/10.1140/epje/i2010-10586-2 |
| Accession Number: |
edsbas.2806CB9B |
| Database: |
BASE |