Morphological transitions in liquid crystal nanodroplets

Tomar, V.; Hernández, S. I.; Abbott, N. L.; Hernández-Ortiz, J. P.; de Pablo, J. J.

doi:10.1039/C2SM25383F

Morphological transitions in liquid crystal nanodroplets

Journal Article · Wed Jul 11 00:00:00 EDT 2012 · Soft Matter

DOI:https://doi.org/10.1039/C2SM25383F· OSTI ID:1623301

Tomar, V. ^[1]; Hernández, S. I. ^[2]; Abbott, N. L. ^[2]; Hernández-Ortiz, J. P. ^[3]; de Pablo, J. J. ^[2]

Univ. of Wisconsin, Madison, WI (United States); Cornell University
Univ. of Wisconsin, Madison, WI (United States)
National Univ. of Colombia, Medellín (Colombia)

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.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Chicago, IL (United States); Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0004025

OSTI ID:: 1623301

Journal Information:: Soft Matter, Journal Name: Soft Matter Journal Issue: 33 Vol. 8; ISSN SMOABF; ISSN 1744-683X

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Constitutive Equation for Nematic Liquid Crystals under Weak Velocity Gradient Derived from a Molecular Kinetic Equation Kuzuu, Nobu; Doi, Masao Journal of the Physical Society of Japan, Vol. 52, Issue 10 https://doi.org/10.1143/JPSJ.52.3486	journal	October 1983
Defects in Degenerate Hybrid Aligned Nematic Liquid Crystals Lavrentovich, O. D.; Nastishin, Yu. A. Europhysics Letters (EPL), Vol. 12, Issue 2 https://doi.org/10.1209/0295-5075/12/2/008	journal	May 1990
Modeling planar degenerate wetting and anchoring in nematic liquid crystals Fournier, J. -B; Galatola, P. Europhysics Letters (EPL), Vol. 72, Issue 3 https://doi.org/10.1209/epl/i2005-10253-5	journal	November 2005
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Interplay of structure, elasticity, and dynamics in actin-based nematic materials Zhang, Rui; Kumar, Nitin; Ross, Jennifer L. Proceedings of the National Academy of Sciences, Vol. 115, Issue 2 https://doi.org/10.1073/pnas.1713832115	journal	December 2017
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Liquid crystal microfluidics: surface, elastic and viscous interactions at microscales Sengupta, Anupam; Herminghaus, Stephan; Bahr, Christian Liquid Crystals Reviews, Vol. 2, Issue 2 https://doi.org/10.1080/21680396.2014.963716	journal	July 2014
Liquid crystals in micron-scale droplets, shells and fibers Urbanski, Martin; Reyes, Catherine G.; Noh, JungHyun Journal of Physics: Condensed Matter, Vol. 29, Issue 13 https://doi.org/10.1088/1361-648x/aa5706	journal	February 2017
Fluctuations and phase transitions of uniaxial and biaxial liquid crystals using a theoretically informed Monte Carlo and a Landau free energy density Villada-Gil, Stiven; Palacio-Betancur, Viviana; Armas-Pérez, Julio C. Journal of Physics: Condensed Matter, Vol. 31, Issue 17 https://doi.org/10.1088/1361-648x/ab0394	journal	March 2019
Influence of boundary conditions on the order and defects of biaxial nematic droplets Chiccoli, C.; Evangelista, L. R.; Pasini, P. Physical Review E, Vol. 100, Issue 3 https://doi.org/10.1103/physreve.100.032702	journal	September 2019
Interplay of Structure, Elasticity and Dynamics in Actin-Based Nematic Materials Zhang, Rui; Kumar, Nitin; Ross, Jennifer arXiv https://doi.org/10.48550/arxiv.1709.04961	text	January 2017

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