Confining blue phase colloids to thin layers

Miha Ravnik, Junichi Fukuda, Julia M. Yeomans, Slobodan Žumer

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Colloidal assembly in strongly confined cholesteric structures is demonstrated using phenomenological modelling. Particle trapping sites and trapping potentials, which are intrinsically imposed by the strongly anisotropic orientational profile of the confined blue phases, are calculated. Locations of the trapping sites and profiles of the trapping potentials are shown to depend importantly on the particle size, and the array of trapping sites can even change symmetry. Trapping sites provide robust binding of various colloidal structures with binding energy of ∼100kT for ∼100 nm particles. Maximising the filling of the trapping sites by particles proves to lower the full free energy of the system, offering means for thermodynamic stabilisation of confined blue phases. Finally, we present formation of disclination cages, formed as a three-dimensional closed network of defect lines surrounding sufficiently large particles with strong homeotropic anchoring.

Original languageEnglish
Pages (from-to)10144-10150
Number of pages7
JournalSoft Matter
Volume7
Issue number21
DOIs
Publication statusPublished - Nov 7 2011

Fingerprint

Colloids
Binding energy
confining
Free energy
colloids
Stabilization
trapping
Particle size
Thermodynamics
Defects
profiles
assembly
stabilization
binding energy
free energy
thermodynamics
defects
symmetry

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Ravnik, M., Fukuda, J., Yeomans, J. M., & Žumer, S. (2011). Confining blue phase colloids to thin layers. Soft Matter, 7(21), 10144-10150. https://doi.org/10.1039/c1sm05707c

Confining blue phase colloids to thin layers. / Ravnik, Miha; Fukuda, Junichi; Yeomans, Julia M.; Žumer, Slobodan.

In: Soft Matter, Vol. 7, No. 21, 07.11.2011, p. 10144-10150.

Research output: Contribution to journalArticle

Ravnik, M, Fukuda, J, Yeomans, JM & Žumer, S 2011, 'Confining blue phase colloids to thin layers', Soft Matter, vol. 7, no. 21, pp. 10144-10150. https://doi.org/10.1039/c1sm05707c
Ravnik M, Fukuda J, Yeomans JM, Žumer S. Confining blue phase colloids to thin layers. Soft Matter. 2011 Nov 7;7(21):10144-10150. https://doi.org/10.1039/c1sm05707c
Ravnik, Miha ; Fukuda, Junichi ; Yeomans, Julia M. ; Žumer, Slobodan. / Confining blue phase colloids to thin layers. In: Soft Matter. 2011 ; Vol. 7, No. 21. pp. 10144-10150.
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