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Bonded Boojum-Colloids in Nematic Liquid Crystals

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† Centro de Física Teórica e Computacional, Universidade de Lisboa, Avenida Professor Gama Pinto 2, PT-1649-003 Lisboa, Portugal
‡ Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, PT-1749-016 Lisboa, Portugal
§ Department of Physics, Sharif University of Technology, Post Office Box 11155-9161, Tehran, Iran
*E-mail: [email protected]
Cite this: Langmuir 2013, 29, 33, 10360–10367
Publication Date (Web):July 16, 2013
https://doi.org/10.1021/la4017195
Copyright © 2013 American Chemical Society
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Abstract

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We investigate bonded boojum-colloids in nematic liquid crystals, configurations where two colloids with planar degenerate anchoring are double-bonded through line defects connecting their surfaces. This bonded structure promotes the formation of linear chains aligned with the nematic director. We show that the bonded configuration is the global minimum in systems that favor twist deformations. In addition, we investigate the influence of confinement on the stability of bonded boojum-colloids. Although the unbonded colloid configuration, where the colloids bundle at oblique angles, is favored by confinement, the bonded configuration is again the global minimum for liquid crystals with sufficiently small twist elastic constants.

Cited By

This article is cited by 8 publications.

  1. Sergej Püschel-Schlotthauer, Victor Meiwes Turrión, Carol K. Hall, Marco G. Mazza, and Martin Schoen . The Impact of Colloidal Surface-Anchoring on the Smectic A Phase. Langmuir 2017, 33 (9) , 2222-2234. https://doi.org/10.1021/acs.langmuir.6b03941
  2. Jure Aplinc, Anja Pusovnik, Miha Ravnik. Designed self-assembly of metamaterial split-ring colloidal particles in nematic liquid crystals. Soft Matter 2019, 15 (28) , 5585-5595. https://doi.org/10.1039/C9SM00842J
  3. Ricardo H. Nochetto, Shawn W. Walker, Wujun Zhang. The Ericksen model of liquid crystals with colloidal and electric effects. Journal of Computational Physics 2018, 352 , 568-601. https://doi.org/10.1016/j.jcp.2017.09.035
  4. R. T. Teixeira-Souza, C. Chiccoli, P. Pasini, L. R. Evangelista, C. Zannoni. Nematic liquid crystals in planar and cylindrical hybrid cells: Role of elastic anisotropy on the director deformations. Physical Review E 2015, 92 (1) https://doi.org/10.1103/PhysRevE.92.012501
  5. K. P. Zuhail, Surajit Dhara. Temperature dependence of equilibrium separation and lattice parameters of nematic boojum-colloids. Applied Physics Letters 2015, 106 (21) , 211901. https://doi.org/10.1063/1.4921634
  6. Mohammad Rahimi, Tyler F. Roberts, Julio C. Armas-Pérez, Xiaoguang Wang, Emre Bukusoglu, Nicholas L. Abbott, Juan J. de Pablo. Nanoparticle self-assembly at the interface of liquid crystal droplets. Proceedings of the National Academy of Sciences 2015, 112 (17) , 5297-5302. https://doi.org/10.1073/pnas.1422785112
  7. Alejandro Londoño-Hurtado, Julio C. Armas-Pérez, Juan P. Hernández-Ortiz, Juan J. de Pablo. Homeotropic nano-particle assembly on degenerate planar nematic interfaces: films and droplets. Soft Matter 2015, 11 (25) , 5067-5076. https://doi.org/10.1039/C5SM00940E
  8. Z. Eskandari, N. M. Silvestre, M. M. Telo da Gama, M. R. Ejtehadi. Particle selection through topographic templates in nematic colloids. Soft Matter 2014, 10 (48) , 9681-9687. https://doi.org/10.1039/C4SM02231A

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