DISCO

Substrate-induced phases of discotic liquid crystals

Coordinatore	INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE SOCIETY    more  Organization address address: RAJA S C MULLICK ROAD 2A 2B city: KOLKATA postcode: 700032 contact info Titolo: Prof. Nome: Amlan J Cognome: Pal Email: send email Telefono: 913325000000 Fax: 913325000000
Nazionalità Coordinatore	India [IN]
Totale costo	15˙000 €
EC contributo	15˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2011-IIF
Funding Scheme	MC-IIFR
Anno di inizio	2014
Periodo (anno-mese-giorno)	2014-05-02   -   2015-05-01

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE SOCIETY  Organization address address: RAJA S C MULLICK ROAD 2A 2B city: KOLKATA postcode: 700032 contact info Titolo: Prof. Nome: Amlan J Cognome: Pal Email: send email Telefono: 913325000000 Fax: 913325000000	IN (KOLKATA)	coordinator	15˙000.00

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 Obiettivo del progetto (Objective)

'The structure of ordinary liquids is altered near a solid surface. The symmetry breaking leads to positional and orientational ordering of molecules. The ordering effect extends generally up to a few molecular dimensions only. A solid interface also plays a well-documented role on the nucleation and growth of crystals. But probably the richer physical situations are observed in the case of liquid crystals, notably anchoring and orientational wetting effects. Liquid crystals are ideal systems to study surface effects for many reasons. First, their fluid character allows reaching thermodynamic equilibrium easily. Second, surface-induced orientational and positional ordering effects can be selectively studied. Third, liquid crystals display several phase transitions around which peculiar phenomena occur. Fourth, liquid crystalline phases are highly symmetrical and allow an easy structural characterization by powder X-ray diffraction. Fifth, liquid crystalline compounds are generally more soluble and easier to process into thin films than crystals. In case of discotic liquid crystals, unusual and interesting phases appear in the vicinity of solid substrates. Such “thin film” phase differs from those for crystalline compounds, where surface induced polymorphism occurs. Such thin film phases in crystals are thermodynamically unstable since a perturbation of the system leads to its transformation into a more stable polymorph that exists also in bulk. The substrate-induced phases observed in discotic liquid crystals are more ordered than the bulk ones and exhibit a three-dimensional order whereas the bulk ones are liquid crystalline and have a two-dimensional order. This project aims to gain a fundamental understanding of the physical and chemical parameters that governs the formation of substrate-induced phases in discotic liquid crystals through a combined theoretical and experimental approach.'