The effect of evacuation, surfactant, prolonged thermal heating and irradiation with ultraviolet radiation on free radicals in detonation nanodiamond powders

Authors

  • Thi Thanh Binh Nguyen Belarusian State University, Niezaliežnasci Avenue, 4, 220030, Minsk, Belarus

Keywords:

detonation nanodiamond powder, electron paramagnetic resonance, evacuation, surfactant, annealing, ultraviolet radiation, EPR line shape

Abstract

The effect of evacuation, surfactant, prolonged thermal heating, and irradiation with ultraviolet radiation on free radicals in detonation nanodiamond (DND) powders was studied by electron paramagnetic resonance. A model of a DND particle consisting of a diamond lattice core and a fullerene-like shell with a surface covered by functional groups is established. Most of paramagnetic centers (PC), shielded from the effects of evacuation and surfactant molecules, are localized within the core of particle. About 10 % paramagnetic centers are on the outside of fullerene-like shell. A change is observed in the EPR line shape under these effects, which reflects the change in the distribution of the PC as a whole in DND powders.

Author Biography

  • Thi Thanh Binh Nguyen, Belarusian State University, Niezaliežnasci Avenue, 4, 220030, Minsk, Belarus

    postgraduate student at the department of semiconductors and nanoelectronics, faculty of physics

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Published

2017-09-29

Issue

No. 3 (2017): Journal of the Belarusian State University. Physics

Section

Condensed State Physics

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How to Cite

(1)
Nguyen, T. T. B. . The Effect of Evacuation, Surfactant, Prolonged Thermal Heating and Irradiation With Ultraviolet Radiation on Free Radicals in Detonation Nanodiamond Powders. Журнал Белорусского государственного университета. Физика 2017, No. 3, 95-101.