Hybrid Carbon Nanotubes-Graphene Nanostructures: Modeling, Formation, Characterization.

Autor: Gerasimenko AY; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia.; Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia., Kuksin AV; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia., Shaman YP; Scientific-Manufacturing Complex 'Technological Centre', Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia.; Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia., Kitsyuk EP; Scientific-Manufacturing Complex 'Technological Centre', Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia., Fedorova YO; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia.; Scientific-Manufacturing Complex 'Technological Centre', Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia., Murashko DT; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia., Shamanaev AA; Scientific-Manufacturing Complex 'Technological Centre', Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia., Eganova EM; Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia., Sysa AV; Scientific-Manufacturing Complex 'Technological Centre', Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia., Savelyev MS; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia.; Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia., Telyshev DV; Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia.; Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia., Pavlov AA; Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia., Glukhova OE; Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia.; Department of Physics, Saratov State University, Astrakhanskaya Street 83, 410012 Saratov, Russia.
Jazyk: angličtina
Zdroj: Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2022 Aug 16; Vol. 12 (16). Date of Electronic Publication: 2022 Aug 16.
DOI: 10.3390/nano12162812
Abstrakt: A technology for the formation and bonding with a substrate of hybrid carbon nanostructures from single-walled carbon nanotubes (SWCNT) and reduced graphene oxide (rGO) by laser radiation is proposed. Molecular dynamics modeling by the real-time time-dependent density functional tight-binding (TD-DFTB) method made it possible to reveal the mechanism of field emission centers formation in carbon nanostructures layers. Laser radiation stimulates the formation of graphene-nanotube covalent contacts and also induces a dipole moment of hybrid nanostructures, which ensures their orientation along the force lines of the radiation field. The main mechanical and emission characteristics of the formed hybrid nanostructures were determined. By Raman spectroscopy, the effect of laser radiation energy on the defectiveness of all types of layers formed from nanostructures was determined. Laser exposure increased the hardness of all samples more than twice. Maximum hardness was obtained for hybrid nanostructure with a buffer layer (bl) of rGO and the main layer of SWCNT-rGO(bl)-SWCNT and was 54.4 GPa. In addition, the adhesion of rGO to the substrate and electron transport between the substrate and rGO(bl)-SWCNT increased. The rGO(bl)-SWCNT cathode with an area of ~1 mm 2 showed a field emission current density of 562 mA/cm 2 and stability for 9 h at a current of 1 mA. The developed technology for the formation of hybrid nanostructures can be used both to create high-performance and stable field emission cathodes and in other applications where nanomaterials coating with good adhesion, strength, and electrical conductivity is required.
Databáze: MEDLINE
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