Modifying the Structure of Multiwalled Carbon Nanotubes with Continuous and Pulsed Ion Beams
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Changes in the local atomic and electronic structure and the chemical state of the surface of multiwalled carbon nanotubes (MWCNTs) irradiated with continuous and pulsed ion beams are studied using transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption near-edge spectroscopy. It is demonstrated that changes in the structure and the chemical state of MWCNTs under continuous irradiation with argon ions are attributable to the radiation-induced defect formation. When a pulsed carbon–proton beam is used, thermal effects exert a considerable influence on the structure of carbon nanotubes. The obtained results suggest that continuous and pulsed ion beams are suitable for targeted functionalization of physical and chemical properties of MWCNTs.
This study was conducted under state assignment for the Omsk Scientific Center (Siberian Branch, Russian Academy of Sciences) in accordance with the Program of Fundamental Research of National Academies of Sciences for 2013–2020 (project no. II.9.2.1, state registration no. АААА-А17-117041210227-8) and was supported in part by the Russian Foundation for Basic Research, project nos. 18-32-00233 mol_a (examination of the structure of MWCNTs irradiated by argon ions) and 16-08-00763 a (TEM studies).
The authors wish to thank Yu.A. Sten’kin for synthesizing the initial MWCNT samples, the management of the Helmholtz-Zentrum Berlin für Materialien und Energie and coordinators of the Russian–German beamline at BESSY II (Berlin, Germany), and the management of the Omsk Shared Use Center (Siberian Branch, Russian Academy of Sciences) for providing the equipment for TEM studies.
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