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Confinement of two-dimensional rods in slit pores and square cavities

Title data

Geigenfeind, Thomas ; Rosenzweig, Sebastian ; Schmidt, Matthias ; de las Heras, Daniel:
Confinement of two-dimensional rods in slit pores and square cavities.
In: The Journal of Chemical Physics. Vol. 142 (2015) Issue 17 . - p. 174701.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4919307

Official URL: Volltext

Abstract in another language

Using Monte Carlo simulation, we analyse the behaviour of two-dimensional hard rods in four different types of geometric confinement: (i) a slit pore where the particles are confined between two parallel walls with homeotropic anchoring; (ii) a hybrid slit pore formed by a planar and a homeotropic wall; square cavities that frustrate the orientational order by imposing either (iii) homeotropic or (iv) planar wall anchoring. We present results for the state diagram as a function of the packing fraction and the degree of confinement. Under extreme confinement, unexpected states appear with lower symmetries than those of the corresponding stable states in bulk, such as the formation of states that break the anchoring constraints or the symmetry imposed by the surfaces. In both types of square cavities the particles form disclinations at intermediate densities. At high densities, however, the elastic stress is relaxed via the formation of domain walls where the director rotates abruptly by ninety degrees.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics II > Chair Theoretical Physics II - Univ.-Prof. Dr. Matthias Schmidt
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics II
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 07 May 2015 07:10
Last Modified: 17 Jul 2018 05:56
URI: https://eref.uni-bayreuth.de/id/eprint/12846