Effects of High-Energy Electron Beam Irradiation on the Structure, Composition and Morphological Properties of Graphene Nanoplatelet Films; [Kesan Penyinaran Rasuk Elektron Bertenaga Tinggi pada Struktur, Komposisi dan Sifat Morfologi Filem Nanoplatelet Grafin]

• Published in: Sains Malaysiana
• Main Author: Nor N.H.M.; Anuar N.A.; Talik N.A.; Wan Abdullah W.A.T.; Kittimanapun K.; Nakajima H.; Chanlek N.; Yahya M.F.Z.R.; Goh B.T.
• Format: Article
• Language: English
• Published: Penerbit Universiti Kebangsaan Malaysia 2023
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182373128&doi=10.17576%2fjsm-2023-5210-17&partnerID=40&md5=b9805158725ef8d55fbccc37c6529172

This work demonstrated the effects of 1.2 GeV high-energy electron beam irradiation on a few-layers of graphene (FLG) and multi-layer graphene (MLG) films grown via an in-house hot wire chemical vapour deposition (HWCVD) system. The FLG and MLG films were grown on highly doped n-type c-Si (100) substrates which were pre-treated using argon plasma (50 W) for 1 min and 10 min, respectively. The as-prepared samples were then irradiated using a 1.2 GeV high-energy electron beam with a dosage of 1.2 × 109 e-/cm2 at atmospheric and room temperature ambient conditions. The effects of the irradiation-mediated defects on the carbon lattice structure of both graphene samples were validated from the decreased sp2 C=C carbon content, and the increase in the adventitious carbon contamination C-O-C content. Raman results showed an elevation of the ID/IG ratio and blue-shift of the 2D and G band peaks for both the irradiated samples, which validated the mediated defects due to the dislocation of carbon atoms in the graphene sheets. The blue-shifted of 2D and G peaks were much more significant in the MLG than FLG which may indicate a better self-reconstructing property for the MLG atomic network, compared to the FLG. The stability of the films against high-energy electron beam irradiation was validated by their conductivity and surface topography. In conclusion, HWCVD grown graphene nanoplatelet films have high potential for graphene-based high-energy charged particle detectors. © 2023 Penerbit Universiti Kebangsaan Malaysia. All rights reserved.