Temperature-controlled liquid crystalline polymorphism of gold nanoparticles

Gold nanoparticles grafted with promesogenic ligands show temperature induced liquid crystalline polymorphism with unique phase sequence: from smectic to columnar structure. The transition is entropy driven; with increasing temperature ligands attached to nanoparticle surface require more space to f...

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Bibliographic Details
Published in:Soft matter 2011-01, Vol.7 (22), p.10561-10564
Main Authors: Wojcik, Michal M, Gora, Monika, Mieczkowski, Jozef, Romiszewski, Jerzy, Gorecka, Ewa, Pociecha, Damian
Format: Article
Language:English
Subjects:
Entropy
Fluctuation
Gold
Ligands
Liquid crystals
Metal particles
Nanoparticles
Polymorphism
Online Access:Get full text
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Summary:Gold nanoparticles grafted with promesogenic ligands show temperature induced liquid crystalline polymorphism with unique phase sequence: from smectic to columnar structure. The transition is entropy driven; with increasing temperature ligands attached to nanoparticle surface require more space to fluctuate. In result smectic layer becomes deformed ('peristaltic mode') and voids between metal particles filled with organic molecules form a hexagonal structure.
ISSN:1744-683X
DOI:10.1039/C1SM06436C