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|Title:||Mega-electron-volt proton irradiation on supported and suspended graphene: A Raman spectroscopic layer dependent study||Authors:||Mathew, S.
Roy Barman, A.
|Issue Date:||15-Oct-2011||Citation:||Mathew, S., Chan, T.K., Zhan, D., Gopinadhan, K., Roy Barman, A., Breese, M.B.H., Dhar, S., Shen, Z.X., Venkatesan, T., Thong, J.T.L. (2011-10-15). Mega-electron-volt proton irradiation on supported and suspended graphene: A Raman spectroscopic layer dependent study. Journal of Applied Physics 110 (8) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3647781||Abstract:||Graphene samples with 1, 2, and 4 layers and 1 + 1 folded bi-layers and graphite have been irradiated with 2 MeV protons at fluences ranging from 1 × 1015 to 6 × 1018 ions/cm2. The samples were characterized using visible and UV Raman spectroscopy and Raman microscopy. The ion-induced defects were found to decrease with increasing number of layers. Graphene samples suspended over etched holes in SiO 2 have been fabricated and used to investigate the influence of the substrate SiO2 for defect creation in graphene. While Raman vibrational modes at 1460 cm-1 and 1555 cm-1 have been observed in the visible Raman spectra of substantially damaged graphene samples, these modes were absent in the irradiated-suspended monolayer graphene. © 2011 American Institute of Physics.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/82677||ISSN:||00218979||DOI:||10.1063/1.3647781|
|Appears in Collections:||Staff Publications|
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