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Title: Liquid-crystal mediated nanoparticle interactions and gel formation

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4802774· OSTI ID:1603418
 [1];  [1];  [1];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Colloidal particles embedded within nematic liquid crystals exhibit strong anisotropic interactions arising from preferential orientation of nematogens near the particle surface. Such interactions are conducive to forming branched, gel-like aggregates. Anchoring effects also induce interactions between colloids dispersed in the isotropic liquid phase, through the interactions of the pre-nematic wetting layers. Here we utilize computer simulation using coarse-grained mesogens to perform a molecular-level calculation of the potential of mean force between two embedded nanoparticles as a function of anchoring for a set of solvent conditions straddling the isotropic–nematic transition. Finally, we observe that strong, nontrivial interactions can be induced between particles dispersed in mesogenic solvent, and explore how such interactions might be utilized to induce a gel state in the isotropic and nematic phases.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States); Univ. of Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Human Genome Research Institute (NHGRI)
Grant/Contract Number:
SC0004025; DMR-1121288; T32HG002760
OSTI ID:
1603418
Journal Information:
Journal of Chemical Physics, Vol. 138, Issue 19; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Cited By (3)

Electro-optical and dielectric properties of CdSe quantum dots and 6CHBT liquid crystals composites journal November 2014
Colloidal nanoparticles trapped by liquid-crystal defect lines: A lattice Monte Carlo simulation journal September 2014
Non-monotonic response of a sheared magnetic liquid crystal to a continuously increasing external field journal January 2020

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