Technical Physics Letters
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Structural changes of multiwalled carbon nanotubes during chemical vapor deposition processes
Vilkov I.V.
1, Ob'edkov A.M.
1, Semenov N.M.
1, Kushnerova OA
1, Dodonov V.A.
1, Tatarskiy D.A.
2
1Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Nizhny Novgorod, Russia
2Lobachevsky University of Nizhny Novgorod, Nizhny Novgorod, Russia
2Lobachevsky University of Nizhny Novgorod, Nizhny Novgorod, Russia
Email: mr.vilkof@yandex.ru, amo@iomc.ras.ru, semenovn.m@yandex.ru, kushnerova@iomc.ras.ru, dodonov@iomc.ras.ru, tatarskiyDA@yandex.ru
The heating processes associated with chemical vapor deposition of nanocoatings during the formation of hybrid nanomaterials based on multiwalled carbon nanotubes can cause structural changes in the nanotubes. Their thermal stability has been determined to be up to 500 oC. At higher temperatures, oxidation of both the nanotubes themselves and catalytic impurities, as well as annealing of defects and graphitization of amorphous carbon forms, are observed. The structure and composition of the nanotubes before and after annealing were studied using electron microscopy, X-ray diffraction analysis, and Raman spectroscopy. Keywords: annealing, multi walled carbon nanotubes, CVD, thermogravimetric analysis, crystal defects.
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