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Russian scientists' new method of nano-diamond grinding

wallpapers News 2021-04-08
Researchers from the Yofi Institute of Physics and Technology of the Russian Academy of Sciences and the St. Petersburg State Institute of Chemical and Pharmaceutical Sciences have developed an optical method for irradiating detonation nano diamond particles. In many publications, the nanoparticle size characteristics of detonation nanodiamonds are calculated based on dynamic light scattering data. Studies have shown that the absorption spectrum of 3-6 nanometer particles has its own distinctive features. Petersburg researchers questioned whether this method is applicable to 3-6 nanometer particles. So Russian researchers began to experiment. Experiments have proved that a purer nano-diamond suspended fine powder can be produced.
   
The research team headed by Professor Yevgen Eidliman, Director of the Physics Teaching and Research Office of the St. Petersburg State Chemical and Pharmaceutical Institute, first milled nanodiamonds to 4 nanometers in the experiment and then detonated the nanodiamonds in water suspension according to their unique method. The liquid undergoes multi-stage heat, acid, and ultrasonic treatment, and finally produces a milky white and dark brown suspension, which is purer than the nano-diamond produced by the standard method of ball milling.
   
In the absorption spectrum of nanodiamonds produced by this new method, the absorption in the range of 300-600Nm has increased significantly. The same result, if it occurs on the nanodiamonds ground by a ball mill, can be explained as local heating and surface graphitization. For the new method, the possibility of local heating and surface graphitization is eliminated.
   
This research result of Russian scientists is not only a contribution to the study of nano-diamond optical methods but also a first step in the development of transparent detonation nano-diamonds.
 
This research has received funding support from multiple channels such as the "Condensed Matter Quantum Physics" program of the Presidium of the Russian Academy of Sciences, the "Basic Research Principles of Nanotechnology and Nanomaterials" program, and the 2009-2013 Federal Special Program for "Innovating Russian Scientific and Technological Talents and Scientific and Educational Talents".

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