Researchers at the Institute of Physics of the Russian Academy of Sciences and the National Institute of Chemical and Pharmaceutical Sciences in St. Petersburg conducted research on the optical screening method of detonation nanodiamonds. Experiments have shown that diamonds with a diameter of 3 to 6 nanometers have unique spectral absorption characteristics. It is possible to obtain a more pure nanodiamond suspension.
Due to the large amount of weak points in the detonation method, this method is not widely used. However, over the past decade, the development of detonation-related purification technologies has once again attracted the attention of researchers who have adopted diamond as the simplest method. The application of nanodiamonds was limited to the field of abrasives such as polycrystalline and polishing agents. With the deepening of people's understanding of the nature of nanodiamonds, nanodiamonds have begun to find applications in metal coatings, lubricating oils, magnetic recording systems, and medicine, and their applications continue to expand.
Nanodiamond particles produced in Russia are generally 200 to 400 nm in diameter. The research team first crushed nano-diamond particles to 4 nanometers, then applied special methods to multi-stage heating of nano-diamond suspensions, followed by acid and ultrasonic treatment to obtain a dark brown nano-diamond emulsion suspension, compared with the standard pure ball milling technology. The result is purer and more transparent.
As for the spectral absorption characteristics unique to diamonds with a diameter of 3 to 6 nanometers, the reason is that the dimer molecules composed of two carbon atoms are formed on the surface of the nanodiamond to reduce the surface area. This hypothesis of the scientist has a theoretical basis and is consistent with the experimental data. In addition, for the spectral absorption experiments performed by the larger nanodiamond particles, the absorption of the spectra disappears due to the lower proportion of the dimer.
The work done by Russian researchers is not only a contribution to the nanodiamond optical analysis method, but also the first step toward preparing a transparent nanodiamond suspension, and this feature may open up a broader space for nanodiamond applications.
Due to the large amount of weak points in the detonation method, this method is not widely used. However, over the past decade, the development of detonation-related purification technologies has once again attracted the attention of researchers who have adopted diamond as the simplest method. The application of nanodiamonds was limited to the field of abrasives such as polycrystalline and polishing agents. With the deepening of people's understanding of the nature of nanodiamonds, nanodiamonds have begun to find applications in metal coatings, lubricating oils, magnetic recording systems, and medicine, and their applications continue to expand.
Nanodiamond particles produced in Russia are generally 200 to 400 nm in diameter. The research team first crushed nano-diamond particles to 4 nanometers, then applied special methods to multi-stage heating of nano-diamond suspensions, followed by acid and ultrasonic treatment to obtain a dark brown nano-diamond emulsion suspension, compared with the standard pure ball milling technology. The result is purer and more transparent.
As for the spectral absorption characteristics unique to diamonds with a diameter of 3 to 6 nanometers, the reason is that the dimer molecules composed of two carbon atoms are formed on the surface of the nanodiamond to reduce the surface area. This hypothesis of the scientist has a theoretical basis and is consistent with the experimental data. In addition, for the spectral absorption experiments performed by the larger nanodiamond particles, the absorption of the spectra disappears due to the lower proportion of the dimer.
The work done by Russian researchers is not only a contribution to the nanodiamond optical analysis method, but also the first step toward preparing a transparent nanodiamond suspension, and this feature may open up a broader space for nanodiamond applications.
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