Systematic study of effects of growth conditions on the (nano-, meso-, micro)size and (one-, two-, three-dimensional) shape of GaN single crystals grown by a direct reaction of Ga with ammonia

摘要: A series of experiments have been conducted to systematically study the effects growth conditions (NH3 flow rate, temperature, chamber pressure, and location) on size (nano, meso, or micro) shape (one, two, three dimensional) GaN single crystal products grown by a direct reaction Ga with NH3. map wider range experimental parameters was developed; it has distinct zones. The in every zone were found depend both temperature NH3 rate other fixed. An effective surface diffusion length consisting atomic molecular length, anisotropy different directions introduced into model, such way that allowed successful explanation all observed results. optimal could thus be determined, which conclusively d...