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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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
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container_end_page 10564
container_issue 22
container_start_page 10561
container_title Soft matter
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creator Wojcik, Michal M
Gora, Monika
Mieczkowski, Jozef
Romiszewski, Jerzy
Gorecka, Ewa
Pociecha, Damian
description 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.
doi_str_mv 10.1039/C1SM06436C
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source Royal Society of Chemistry Journals
subjects Entropy
Fluctuation
Gold
Ligands
Liquid crystals
Metal particles
Nanoparticles
Polymorphism
title Temperature-controlled liquid crystalline polymorphism of gold nanoparticles
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