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Title: Morphological transitions in liquid crystal nanodroplets

Abstract

A continuum theory is utilized to study ordering in liquid crystal nanodroplets. The free energy functional that describes the system is minimized using an Euler–Lagrange approach and an unsymmetric radial basis function method. The equilibrium morphology in nanodroplets is shown to represent a delicate balance between bulk and surface contributions; when the radius of the droplet reaches a critical value, that balance is altered and the droplet undergoes a transition. By controlling the anchoring conditions at the droplet's surface, one can control the radius where the transition occurs and even prepare metastable droplets where small perturbations can trigger a morphological transition. The findings of the theory are shown to be consistent with recent experimental observations on monodisperse nematic liquid crystal nanodroplets.

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. National Univ. of Colombia, Medellín (Colombia)
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States); Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1623301
Grant/Contract Number:  
SC0004025; DMR-1121288
Resource Type:
Accepted Manuscript
Journal Name:
Soft Matter
Additional Journal Information:
Journal Volume: 8; Journal Issue: 33; Journal ID: ISSN 1744-683X
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Tomar, V., Hernández, S. I., Abbott, N. L., Hernández-Ortiz, J. P., and de Pablo, J. J. Morphological transitions in liquid crystal nanodroplets. United States: N. p., 2012. Web. doi:10.1039/C2SM25383F.
Tomar, V., Hernández, S. I., Abbott, N. L., Hernández-Ortiz, J. P., & de Pablo, J. J. Morphological transitions in liquid crystal nanodroplets. United States. https://doi.org/10.1039/C2SM25383F
Tomar, V., Hernández, S. I., Abbott, N. L., Hernández-Ortiz, J. P., and de Pablo, J. J. Wed . "Morphological transitions in liquid crystal nanodroplets". United States. https://doi.org/10.1039/C2SM25383F. https://www.osti.gov/servlets/purl/1623301.
@article{osti_1623301,
title = {Morphological transitions in liquid crystal nanodroplets},
author = {Tomar, V. and Hernández, S. I. and Abbott, N. L. and Hernández-Ortiz, J. P. and de Pablo, J. J.},
abstractNote = {A continuum theory is utilized to study ordering in liquid crystal nanodroplets. The free energy functional that describes the system is minimized using an Euler–Lagrange approach and an unsymmetric radial basis function method. The equilibrium morphology in nanodroplets is shown to represent a delicate balance between bulk and surface contributions; when the radius of the droplet reaches a critical value, that balance is altered and the droplet undergoes a transition. By controlling the anchoring conditions at the droplet's surface, one can control the radius where the transition occurs and even prepare metastable droplets where small perturbations can trigger a morphological transition. The findings of the theory are shown to be consistent with recent experimental observations on monodisperse nematic liquid crystal nanodroplets.},
doi = {10.1039/C2SM25383F},
journal = {Soft Matter},
number = 33,
volume = 8,
place = {United States},
year = {Wed Jul 11 00:00:00 EDT 2012},
month = {Wed Jul 11 00:00:00 EDT 2012}
}

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