Molecular Beam Epitaxy System

In MBE system, we put material in Knudsen cell (K-cell), which heat the material source indirectly by tungsten filament to effuse the material. While the molecular beam contact with the substrate, molecules without polarities will induce some dipole moment by thermal disturbance and this weak polarity will deposit on the substrate. On the other hand, molecules with polarities will possess stronger adsorb ability.