TY - JOUR

T1 - Nanostructuring of CVD graphene by high-energy heavy ions

AU - Antonova, Irina V.

AU - Nebogatikova, Nadezhda A.

AU - Erohin, Sergey V.

AU - Prenas, Vladimir A.

AU - Smovzh, Dmitrii V.

AU - Suprun, Evgenii A.

AU - Volodin, Vladimir A.

AU - Olejniczak, Andrzej

AU - Sorokin, Pavel B.

N1 - Funding Information: The authors acknowledge the financial support of the Russian Scientific Foundation (No. 19-72-10046 ). The SEM studies werе conducted using the equipment of the Center of Collective Use “National Center of Catalyst Research”. The Raman spectra were registered using the equipment of the Center of collective usage “VTAN” at the ATRC Department of NSU. I(T), and the Q-DLTS measurements were performed using “ASEC” in the “Graphene Nanotechnologies” Laboratory in the AIC of NEFU (Yakutsk). The calculations were performed at the supercomputer cluster provided by the Joint Supercomputer Center of the Russian Academy of Sciences. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/3

Y1 - 2022/3

N2 - In this study, CVD graphene with a typical set of structural features (domains, folds and blisters) is used to see the relation between the effects of its nanostructuring by high-energy ion irradiation (Xe and Kr with energies 26–167 MeV) and the graphene structure. The pore size was found to depend on the domain size and the ion energy, and equal to 10–30 nm and 60–80 nm for domains of 1–3 μm and ~10 μm, respectively. The pore density was estimated as ~10% from the ion fluence. The maximum pore density, approximately equal to the ion dose, was found in the strained graphene blisters. The formation of more complex structural defects (presumably, ultrashort nanotubes covered with a graphene monolayer on the top) is also revealed after the ion irradiation in few-layer graphene. The top layer preservation after irradiation was justified by the molecular dynamics simulation and caused by lower energy losses (absence of the electrons knocked out of the previous layers). The possibility of forming vertical wells in ultrashort nanotubes, due to interlayer covalent bonds at the edges of some pores, is very attractive for applications. The use of CVD graphene provides ample opportunities for controlling the structure and properties of nanostructured materials.

AB - In this study, CVD graphene with a typical set of structural features (domains, folds and blisters) is used to see the relation between the effects of its nanostructuring by high-energy ion irradiation (Xe and Kr with energies 26–167 MeV) and the graphene structure. The pore size was found to depend on the domain size and the ion energy, and equal to 10–30 nm and 60–80 nm for domains of 1–3 μm and ~10 μm, respectively. The pore density was estimated as ~10% from the ion fluence. The maximum pore density, approximately equal to the ion dose, was found in the strained graphene blisters. The formation of more complex structural defects (presumably, ultrashort nanotubes covered with a graphene monolayer on the top) is also revealed after the ion irradiation in few-layer graphene. The top layer preservation after irradiation was justified by the molecular dynamics simulation and caused by lower energy losses (absence of the electrons knocked out of the previous layers). The possibility of forming vertical wells in ultrashort nanotubes, due to interlayer covalent bonds at the edges of some pores, is very attractive for applications. The use of CVD graphene provides ample opportunities for controlling the structure and properties of nanostructured materials.

KW - CVD graphene

KW - Defects activity

KW - High-energy ion irradiation

KW - Nanopores

KW - Ultrashort nanotubes

UR - http://www.scopus.com/inward/record.url?scp=85124186454&partnerID=8YFLogxK

U2 - 10.1016/j.diamond.2022.108880

DO - 10.1016/j.diamond.2022.108880

M3 - Article

AN - SCOPUS:85124186454

VL - 123

JO - Diamond and Related Materials

JF - Diamond and Related Materials

SN - 0925-9635

M1 - 108880

ER -