| | We implement molecular dynamics simulations to study the effect of confinement on a 2d crystal of point particles interacting with an inverse power law potential in a narrow channel. This system can describe colloidal particles at the air-water interface. It is shown that the system characteristics depend sensitively on the boundary conditions at the two walls providing the confinement. The walls exert perpendicular forces on their adjacent particles. Structural quantities such as density profile, structure factor and orientational order parameter are computed. It is shown that orientational order persists near the walls even at temperatures where the system in the bulk is in the fluid state. The dependence of elastic constants, stress tensor elements, shear and bulk modluii on density as well as the channel width is discussed.
Seminar Speaker:
Dr. M.E. Fouladvand
Date:
19 April 2012 | |
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