title: Model of hard spheroplatelets near a hard wall.
abstract: A system of hard spheroplatelets near an impenetrable wall is studied in the low-density Onsager approximation. Spheroplatelets have optimal shape between rods and plates, and the direct transition from the isotropic to biaxial nematic phase is present. A simple local approximation for the one-particle distribution function is used. Analytical results for the surface tension and the entropy contributions are derived. The density and the order-parameter profiles near the wall are calculated. The preferred orientation of the short molecule axes is perpendicular to the wall. Biaxiality close to the wall can appear only if the phase is biaxial in the bulk.
authors.affiliation: Institute of Physics, Jagiellonian University, ulica Reymonta 4, 30-059 Kraków, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Kapanowski
authors.affiliation: Institute of Physics, Jagiellonian University, ulica Reymonta 4, 30-059 Kraków, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Abram
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D044367:Phase Transition; D013816:Thermodynamics
chemical_list: D003102:Colloids