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Uniaxial alignment of nanoconfined columnar mesophases.

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Mouthuy, Pierre-Olivier [UCL] Melinte, Sorin [UCL] Geerts, Yves H [ULB] Jonas, Alain M. [UCL]

By confining discotic phthalocyanines in a network of crisscrossed nanogrooves, we obtain a uniaxial alignment of the columnar mesophase. The alignment process is based on the anisotropy of interface tension between the mesophase and the nanogrooves' walls. Preferential mesophase alignment results from this nonhomogeneity combined with the anisotropy of the network cell dimensions. A simple model is proposed to explain the experimental observations.

Document type Article de périodique (Journal article) – Article de recherche – Journal Article, Research Support, Non-U.S. Gov't
Access type Accès restreint
Publication date 2007
Language Anglais
Journal information "Nano Letters" - Vol. 7, no. 9, p. 2627-2632 (2007)
Peer reviewed yes
Publisher American Chemical Society
issn 1530-6984
Publication status Publié
Affiliations UCL - FSA/ELEC - Département d'électricité
UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
MESH Subject Anisotropy ; Computer Simulation ; Crystallization - methods ; Liquid Crystals - chemistry ; Macromolecular Substances - chemistry ; Materials Testing ; Models, Chemical ; Models, Molecular ; Molecular Conformation ; Nanostructures - chemistry - ultrastructure ; Nanotechnology - methods ; Particle Size ; Phase Transition ; Surface Properties
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Bibliographic reference Mouthuy, Pierre-Olivier ; Melinte, Sorin ; Geerts, Yves H ; Jonas, Alain M.. Uniaxial alignment of nanoconfined columnar mesophases.. In: Nano Letters, Vol. 7, no. 9, p. 2627-2632 (2007)
Permanent URL http://hdl.handle.net/2078.1/11060