  We suggest a method for the self-consistent calculations of characteristics
of metal films in dielectric environment. Within a modified Kohn-Sham method
and stabilized jellium model, the most interesting case of asymmetric
metal-dielectric sandwiches is considered, for which dielectric media are
different from the two sides of the film. As an example, we focus on Na, Al and
Pb. We calculate the spectrum, electron work function, and surface energy of
polycrystalline and crystalline films placed into passive isolators. We find
that a dielectric environment generally leads to the decrease of both the
electron work function and surface energy. It is revealed that the change of
the work function is determined only by the average of dielectric constants
from both sides of the film.
