Composition and Chemical State of Nanopowder Particles Obtained by Grinding Natural Diamond and by Detonation Synthesis

Abstract The initial composition and chemical state of primary particles of nanopowders obtained by grinding natural diamond and detonation synthesis have been investigated using X-ray photoelectron spectroscopy. It is shown that the primary particles of both nanopowders contain mainly carbon and oxygen atoms. Signals from nitrogen, sulfur, chlorine, and metal atoms do not exceed the noise level in the photoelectron spectrum. It has been found that in the primary particles of detonation synthesis nanopowder and nanopowder obtained by grinding natural diamond, the proportion of carbon atoms is ~ 46.5 and ~ 67.8% in the sp1-hybridization state, ~ 26.8 and ~ 17.4% in sp2 – hybridization, and ~ 26.7 and ~ 14.7%, respectively, in the composition of oxygen-containing functional groups.