Keyword: «detonation synthesis»

STRUCTURE AND DEFECTS OF NANO-DIAMONDS OBTAINED BY DETONATION SYNTHESIS AND MECHANICAL GRINDING

Authors:

Mariya Akimova,

Anastasiya Sivceva,

Petr Sharin,

Sofya Yakovleva

A comparative analysis was conducted on the morphology and structural characteristics of primary particles in powders of natural nanodiamonds (NND) and detonation-synthesized nanodiamonds (DND), obtained by mechanical grinding and detonation synthesis methods respectively. The study employed high-resolution scanning electron microscopy techniques. Differences were observed in particle size, shape, and density defect between both types of powder. Interplanar distances and structural parameters of nanoparticles were determined. It was shown that NND nanocrystals are characterized by a wide variety of shapes and sizes, whereas DND particles demonstrate greater uniformity, although structural defects in the core of DNA particles occur more frequently.

Keywords: electron microscopy, nanodiamonds, detonation synthesis, mechanical grinding, structure of nanoparticles

IR SPECTROSCOPY OF NANODIAMONDS OBTAINED BY DETONATION SYNTHESIS AND MECHANICAL MILLING BEFORE AND AFTER THERMAL TREATMENT

Authors:

Anastasiya Sivceva,

Mariya Akimova,

Petr Sharin,

Sofya Yakovleva,

Fedor Protopopov,

Vladilina Koryakina

The effect of thermal treatment on the composition of oxygen-containing functional groups in natural (NND) and detonation (DND) nanodiamonds was studied using FTIR spectroscopy and Boehm titration. It was found that annealing in air at 550 °C alters the ratio of hydroxyl and carbonyl groups, removes non-diamond carbon forms, and improves the ordering of the surface structure. The results are consistent with XPS data and confirm the effectiveness of thermal treatment for nanodiamond purification.

Keywords: functional groups, nanodiamonds, detonation synthesis, thermal treatment, surface structure, ftir spectroscopy