Features of the synthesis of straight and spiral carbon nanotubes by the pyrolytic method - O. D. Zolotarenko; O. P. Rudakova; A. D. Zolotarenko; N. Y. Akhanova; M. Ualkhanova; D. V. Shchur; M. T. Habdulin; T. V. Myronenko; O. D. Zolotarenko; M. V. Chymbai (Chemistry, physics and technology of surface, 2023)