  The vertical drying of a two dimensional colloidal film containing
zero-thickness sticks (lines) was studied by means of kinetic Monte Carlo (MC)
simulations. The continuous two-dimensional problem for both the positions and
orientations was considered. The initial state before drying was produced using
a model of random sequential adsorption with isotropic orientations of the
sticks. During the evaporation, an upper interface falls with a linear velocity
in the vertical direction and the sticks undergo translational and rotational
Brownian motions. The MC simulations were run at different initial number
concentrations (the numbers of sticks per unit area), $p_i$, and solvent
evaporation rates, $u$. For completely dried films, the spatial distributions
of the sticks, the order parameters and the electrical conductivities of the
films in both the horizontal, $x$, and vertical, $y$, directions were examined.
Significant evaporation-driven self-assembly and stratification of the sticks
in the vertical direction was observed. The extent of stratification increased
with increasing values of $u$. The anisotropy of the electrical conductivity of
the film can be finely regulated by changes in the values of $p_i$ and $u$.
