Stable sols of carboxylated diamond nanoparticles in dimethyl sulfoxide

Stable sols of detonation synthesis diamond nanoparticles with negative electrokinetic potential in dimethyl sulfoxide, one of the most common non-aqueous solvents widely used in organic synthesis and medicine, were obtained for the first time. Sol stability is achieved by steric stabilization of the surface of diamond nanoparticles due to a cationic surfactant, cetyltrimethylammonium bromide, which binds to the carboxyl groups of diamond nanoparticles. The obtained stable sols can be used for subsequent chemical modification of the surface of diamond nanoparticles.