ИСТИНА

ISBN 978-5-93634-060-4 Detonation nanodiamond (DND) is special nanomaterial because it largely retains the unique mechanical, physical and chemical properties of diamond and, unlike almost all other nano-dispersed materials, there are no foreign phases on its surface, and only a wide range of surface chemicals compounds. In this regard, the surface of an individual nanodiamond crystal can be considered as a subject of a peculiar surface organic chemistry, however, the initial polyfunctionality of individual nanodiamond surface can be changed by carrying out heterogeneous chemical reactions leading either to the removal of surface functional groups or the addition of new ones. Such processes can be considered as a kind of horizontal strategy for modifying nanodispersed diamond [1], in contrast to well-known vertical strategies (bottom-up and top-down). As is known, the duration of the synthesis of DND occurring at the front of the detonation wave is less than 1 μs and it requires a considerable lengthy subsequent “upbringing” by chemical and physicochemical methods. Due to fairly strong surface chemical bonds, the DND modification process is usually carried out in chemically active media and / or at elevated temperatures. Oxidative treatment provided by boiling in 72 % HClO4 at 203 °C for 5 hours. The treatment by hydrogen and deuterium of the surface are provided at atmospheric pressure at 850 °C for 5 hours. The surface chlorination proceeds 6 hours at 450 °C in CCl4 vapors. According to TGA, the DND modification usually change the polyfunctionality of the surface and stability against oxidation. Moreover the differences of the DND with provided termination in hydrophility, IR spectra, photoluminescence and electrophysical properties was measured and discussed.