SYNTHESIS AND MODIFICATION OF CARBON NANOHORNS STRUCTURE FOR HYPERTHERMIC APPLICATION
O.A. Gurova1,2, L.V. Omelyanchuk3, T.D. Dubatolova3, E.I. Antokhin4, V.S. Eliseev4, I.V. Yushina1, A.V. Okotrub1,2
1Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk National Research State University, Novosibirsk, Russia
3Institute of Molecular and Cell Biology, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
4Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: углеродные нанохорны, РФЭС, NEXAFS, водные суспензии, спектроскопия оптической плотности поглощения, гипертермические свойства, carbon nanohorns, XPS, aqueous suspensions, optical absorbance spectroscopy, hyperthermic properties
Abstract
Monolayer carbon framework nanoparticles (nanohorns) (CNHs) are synthesized by two methods: electric arc and electron evaporation of graphite in the inert atmosphere. Based on the data of electron microscopy and Raman light spectroscopy distinctions in the structures of materials obtained by different methods are revealed. By X-ray photoelectron and NEXAFS spectroscopy a change in the chemical structure of the CNH surface during their oxidation is considered. It is found that oxidation causes the destruction of CNH agglomerates and weakly affects the structure of graphene nets. However, these changes are sufficient for an increase in the infrared radiation absorption by the dispersion of nanohorns in water. It is shown that the efficiency of laser heating with a wavelength of 808 nm of CNH dispersion depends on the synthesis method and chemical modification of nanoparticles, which enables their potential use for local hyperthermia of cells of living organisms in cancer therapy.
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