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Effect of irradiation upon single layer graphene on SiO2/Si substrate using electron beam irradiation (EBI)

Zamzuri, Ahmad Syahmi and Ayob, Nur Idayu and Abdullah, Yusof and Hasbullah, Nurul Fadzlin (2020) Effect of irradiation upon single layer graphene on SiO2/Si substrate using electron beam irradiation (EBI). In: 4th Advanced Materials Conference 2018, 27-28 Nov 2018, Kuching, Malaysia.

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Graphene is of particular interest in utilizing it as a carbon-based radiation device due to its unique electronic properties. The understanding of radiation damage mechanism in graphene is crucial for applications in radiation harsh environments. In this paper, we investigate the influence of high energy (MeV) electron beam irradiation on structural and electrical properties of single layer graphene (SLG) prepared by Chemical Vapor Deposition (CVD) on SiO2/Si substrate using Raman Microscopy and Current-Voltage (I-V) measurement. The samples were irradiated at doses of 50 kGy, 100 kGy and 200 kGy with high energy voltage of 3 MeV. It was found that as irradiation dose increases to 100 kGy, the 2D bands and G bands shift to lower frequency energy and surprisingly no appearance of D band. As dose increases to 200 kGy, the G band shifts to higher frequency energy and 2D band shifts back to position similar with the pristine graphene as before irradiation. Only a small D band appear at 1349 cm�1 after 200 kGy of irradiation. This means that only small number of defects formed in SLG structure even after it is irradiated at higher electron energy (MeV), indicating stability of the SLG used in this study. I-V analysis shows non-monotonic behaviour of graphene which electrical conductance increase at 50 kGy, decrease at 100 kGy and increase significantly at 200 kGy. The major mechanism is probably related to the chargetransfer doping due to the high dose of electron irradiation and low defect scattering.

Item Type: Conference or Workshop Item (Plenary Papers)
Additional Information: 7640/91177
Uncontrolled Keywords: Single layer graphene Radiation damage Electron irradiation Graphene FET I-V characteristics Raman spectra
Subjects: T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr. Nur Idayu Ayob
Date Deposited: 02 Aug 2021 10:38
Last Modified: 02 Aug 2021 10:38
URI: http://irep.iium.edu.my/id/eprint/91177

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