Investigation of Electron Irradiation Effects on Graphene by Optical and Electrical Characterization

Hiroshi OKADA  Akira NAGAHARA  

IEICE TRANSACTIONS on Electronics   Vol.E99-C    No.5    pp.559-562
Publication Date: 2016/05/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E99.C.559
Type of Manuscript: BRIEF PAPER
graphene,  electron irradiation,  Raman spectroscopy,  photoconductivity,  

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Effects of electron beam irradiation at 15 keV on graphene are investigated by optical and electron characterization using Raman and two-terminal resistance measurement and photoconductivity measurement. In Raman spectra, increase of defects in D-peak to G-peak ratio by increase of electron irradiation by 70 mC/cm2 was found. Resistance of graphene showed an increase after the irradiation. Rather sensitive change was found in photoconductivity of irradiated graphene under ultra-violet (UV) illumination, suggesting irradiation induced defects affect a photoconductivity properties of the graphene.