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Title: Different modulated structures of topological defects stabilized by adaptive targeting nanoparticles
Authors: Cordoyiannis, George ×
Jampani, Venkata Subba Rao
Kralj, Samo
Dhara, Surajit
Tzitzios, Vassilios
Basina, Georgia
Nounesis, George
Kutnjak, Zdravko
Tripathi, Chandra Shekhar Pati
Losada-Perez, Patricia
Jesenek, Dalija
Glorieux, Christ
Musevic, Igor
Zidansek, Aleksander
Ameinitsch, Heinz
Thoen, Jan #
Issue Date: 2013
Publisher: Royal Society of Chemistry
Series Title: Soft Matter vol:9 issue:15 pages:3956-3964
Abstract: It is demonstrated that interactions between nanoparticles and topological defects induce a twist-grain
boundary phase in a chiral liquid crystal. The occurrence of this phase, the analogue of the Shubnikov
phase in type-II superconductors, is driven by direct interactions between surface-functionalized CdSe
quantum dots and screw dislocations. It is shown that, within an adaptive-defect-core-targeting
mechanism, nanoparticles of appropriate size and functionalization adapt to qualitatively different cores
of topological defects such as disclination lines and screw dislocations. This mechanism enables the effective reduction of the energetically costly, singular defect core volume, while the surrounding phase ordering remains relatively weakly affected. The findings suggest new pathways towards the controlled assembly of superstructures in diverse, symmetry-broken, condensed-matter systems, ranging from nanoparticle-decorated liquid crystals to superconductors.
ISSN: 1744-683X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter and Biophysics
× corresponding author
# (joint) last author

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