УДК: 538.958, 538.971, 539.21

Infrared absorption of diamond nanoparticles with a surface modified by complexes of nitrate ions

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Осипов В.Ю., Романов Н.М. Инфракрасное поглощение алмазных наночастиц с поверхностью, модифицированной комплексами нитрат-ионов // Оптический журнал. 2017. Т. 84. № 5. С. 3–7.

Osipov V.Yu., Romanov N.M. Infrared absorption of diamond nanoparticles with a surface modified by complexes of nitrate ions [in Russian] // Opticheskii Zhurnal. 2017. V. 84. № 5. P. 3–7.

For citation (Journal of Optical Technology):

V. Yu. Osipov and N. M. Romanov, "Infrared absorption of diamond nanoparticles with a surface modified by complexes of nitrate ions," Journal of Optical Technology. 84(5), 285-288 (2017). https://doi.org/10.1364/JOT.84.000285

Abstract:

The infrared-absorption spectrum of detonation nanodiamond (DND) particles with a surface modified by complexes of nitrate ions is characterized by a narrow line of strong absorption at 1384 cm⁻¹ and an unstructured absorption band in the range of 1000–1300 cm⁻¹. The DND surface is predominantly functionalized with oxygen-containing atomic groups, and the nitrate ion is in a coordinate position over a surface defect in the diamond lattice, i.e., positively charged substitutional nitrogen. Because of heat treatment in air at 350°C, the absorption line at 1384 cm⁻¹ disappears, which indicates the decomposition of the complex and removal of nitrate ions from the surface of the DND particles. The specific form of the infrared-absorption spectrum allows us to consider such a complex on the surface of the DND as a characteristic marker for the detection of these particles in mixtures and suspensions.

Keywords:

IR spectroscopy, nanodiamond, surface modification, nitrate ion, complex vibrational modes

Acknowledgements:

The authors are grateful to A. Ya. Vul’ (PTI) and I. B. Zakharova (SPbSPU) for their attention to this work. This research was supported by the RSF (Project 14-13-00795: “Synthesis of optically active materials based on nanodiamonds modified by ions of 3d–4f elements”).

OCIS codes: 300.6340, 160.4236, 350.4990, 300.6520

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