Grwoth modes in vapor-phase prepared orthorhombic molybdenum trioxide crystals

摘要

Vapour-phase growth of orthorhombic molybdenum triadic has been carried out under various growth conditions. It is found that the Miller-index of c-axis-related crystal planes increases with rise in degree of vapor supersturation in the order of {0 0- 1}<{1 0 2}<2 0 3)<{1 0 1}<3 0 2}<{2 0 1}<{4 0 1}; some of these lanes ar observed for the first time. In high supersaturation growths, natural crystal planes associated to c-direction, change to convex curved growth fronts, whereas in low supersturation cases, low Miller-index planes (left-hand side of the above order) persist. Formations of curvy steps and terraces on {0 1 0} planes are correlated to growth temperature and supersaturating. Growth mechanisms/oscillation are also addressed on the basis of the current findings.