STUDY OF SURFACE-PROPERTIES OF ULTRAFINE DIAMONDS

The methods of macroelectrophoresis and potentiometric titration were applied to evaluate and compare the electrosurface and adsorption prop erties of ultrafine diamonds isolated from the products of synthesis b y different techniques. Approximate composition and quantity of the pr otogenic functional groups on the diamond surface were evaluated by th e Boehm method. The ultrafine diamonds obtained by oxidation of non-di amond carbon with air oxygen were shown to be characterized by a highe r content of the protogenic groups including carboxylic ones and by hi gher magnitudes of the electrokinetic potential and adsorption capacit y.