Study of supported CVD graphene irradiated by He and Au ions

0517489 - ÚJF 2020 RIV GB eng J - Journal Article
Malinský, Petr - Cutroneo, Mariapompea - Hnatowicz, Vladimír - Stammers, James H. - Luxa, J. - Szokolova, K. - Sofer, Z. - Macková, Anna
Study of supported CVD graphene irradiated by He and Au ions.
Vacuum. Roč. 170, č. 12 (2019), č. článku 108952. ISSN 0042-207X. E-ISSN 1879-2715.
[17th Joint Vacuum Conference (JVC). Olomouc, 10.09.2018-14.09.2018]
R&D Projects: GA ČR GA16-05167S; GA MŠMT EF16_013/0001812; GA MŠMT LM2015056
Institutional support: RVO:61389005
Keywords : Graphene * ion irradiation * chemical properties * electric properties
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 2.906, year: 2019
Method of publishing: Limited access
https://doi.org/10.1016/j.vacuum.2019.108952

In this work, a graphene monolayer deposited on the SiO2/Si substrate by means of Chemical Vapour Deposition (CVD) was irradiated using He and Au ions. The energy of used ions was 1.8 MeV and ion fluences varied in the range from 1.0 x 10(13) cm(-2) to 1.0 x 10(15) cm(-2). The different mass of Au and He ions leads to the significantly different electronic and nuclear stopping ratios and thus a difference in ion beam induced defects, of which the nature, size and density were estimated from the evolution of relative intensities of Raman lines. The chemical composition with possible oxidation of graphene layer and structural changes of the irradiated graphene were characterized by Attenuated Total Reflection - Fourier Transform Infrared (ATR-FTIR). The surface conductivity was measured by using standard two point method. The used ion irradiation leads to defect production in graphene structures whose density increases with increasing ion fluence and is significantly more pronounced for heavier gold ions. The graphene modification causes the slight conductivity decrease in the case of He irradiation in accordance with the observed structural degradation and significant decrease of graphene conductivity after Au irradiation.
Permanent Link: http://hdl.handle.net/11104/0302816