This article is cited in 4 papers

Communications

Irradiation of detonation nanodiamonds with γ-rays does not produce long living spin radicals

V. Yu. Osipov^a, N. M. Romanov^bc, K. Takai<sup>d

a</sup> Ioffe Institute, St. Petersburg, Russian Federation
^b School of Engineering Science, LUT University, Lappeenranta, Finland
^c Joint-Stock Company 'Svetlana-Semiconductors', St. Petersburg, Russian Federation
^d Department of Chemical Science and Technology, Hosei University, Tokyo, Japan

Abstract: Detonation nanodiamonds of 5nm size with the surface terminated by carboxyl and/or hydroxyl groups, which act as radical scavengers, represent promising nanofillers for polymer composites. Irradiation of the nanodiamonds with ¹³⁷Cs γ-rays does not produce long living paramagnetic species both inside the crystalline core and in the outer molecular shell. The reason is rapid interaction of the radiation-induced surface radicals with physisorbed water, molecular oxygen and oxidizing products of their radiolysis.

Keywords: detonation nanodiamond, surface functional groups, dangling bond spins, spin paramagnetism, γ-radiation, radiation chemistry.

Language: English

DOI: 10.1016/j.mencom.2021.03.027

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