Combustion flame synthesis: a promising technique to obtain diamond singlecrystal

Negative substrate-bias effects on diamond growth have been investigated us ing combustion flame synthesis. Diamond coatings with highly oriented cryst als [{100}facets] or with a smooth surfaces were produced following the dif ferent deposition conditions. Specially, the heteroepitaxial,srowth of diam ond on a carbide tungsten substrate was observed by scanning electron micro scopy (SEM). The advantage of this method is that diamond grows on itself t o achieve large-single crystal growth. These results are discussed with ref erence to competing heteroepitaxial growth of diamond. The role of negative substrate bias in nucleation and orientation of diamond crystallinity is a lso discussed. (C) 1999 Elsevier Science S.A. All rights reserved.