Researchers at the Joseph Institute of Physics and Technology of the Russian Academy of Sciences and the National Institute of Chemical and Pharmaceutical Sciences in St. Petersburg have developed optical methods for irradiating detonated nanodiamond particles. In many publications, the nanoparticle size characteristics of detonation nanodiamonds are calculated from dynamic light scattering data. Studies have shown that the absorption spectra of 3-6 nanoparticles have significant characteristics. Researchers in Petersburg question whether this method is suitable for particles of 3-6 nm. So Russian researchers began experimenting. It has been proved by experiments that a more pure nano-diamond suspended fine powder can be produced.
The research team headed by Professor Yevgen Adelman, director of the Department of Physics, St. Petersburg State Chemical and Pharmaceutical College, first grinds nanodiamonds to 4 nanometers in the experiment, and then detonates the nanodiamond water suspension according to their unique method. The liquid is subjected to multiple stages of heat, acid, and sonication to produce a milky dark brown suspension that is more pure than the nanodiamonds produced by the ball mill standard method.
In the absorption spectrum of the nanodiamond produced by this new method, the absorption amount in the range of 300-600 Nm is remarkably increased. The same result, if it occurs on the nanodiamond milled by the ball mill, can be interpreted as local heating and surface graphitization. For the new method, the possibility of localized heating and surface graphitization is ruled out.
The results of this research by Russian scientists are not only a contribution to the study of nano-diamond optical methods, but also a first step in the development of transparent detonation nanodiamonds. The research has received multi-channel funding support from the "Condensed State Quantum Physics" program of the Presidium of the Russian Academy of Sciences, the "Basic Principles of Nanotechnology and Nanomaterials" and the 2009-2013 Federal Special Program for "Innovative Russian Science and Technology Talents and Science and Education Talents". .
The research team headed by Professor Yevgen Adelman, director of the Department of Physics, St. Petersburg State Chemical and Pharmaceutical College, first grinds nanodiamonds to 4 nanometers in the experiment, and then detonates the nanodiamond water suspension according to their unique method. The liquid is subjected to multiple stages of heat, acid, and sonication to produce a milky dark brown suspension that is more pure than the nanodiamonds produced by the ball mill standard method.
In the absorption spectrum of the nanodiamond produced by this new method, the absorption amount in the range of 300-600 Nm is remarkably increased. The same result, if it occurs on the nanodiamond milled by the ball mill, can be interpreted as local heating and surface graphitization. For the new method, the possibility of localized heating and surface graphitization is ruled out.
The results of this research by Russian scientists are not only a contribution to the study of nano-diamond optical methods, but also a first step in the development of transparent detonation nanodiamonds. The research has received multi-channel funding support from the "Condensed State Quantum Physics" program of the Presidium of the Russian Academy of Sciences, the "Basic Principles of Nanotechnology and Nanomaterials" and the 2009-2013 Federal Special Program for "Innovative Russian Science and Technology Talents and Science and Education Talents". .
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