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The effect of cesium dopant on APCVD graphene coating on copper

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Title
The effect of cesium dopant on APCVD graphene coating on copper
Author(s)
Samira Naghdi; Katarina Nešović; Gonzalo Sánchez-Arriaga; Hyun Yong Song; Sung Wng Kim; Kyong Yop Rhee; Vesna Mišković-Stanković
Subject
Doping, ; EIS, ; Graphene, ; Polarization, ; Raman spectroscopy, ; XPS
Publication Date
2020-10
Journal
Journal of Materials Research and Technology, v.9, no.5, pp.9798 - 9812
Publisher
ELSEVIER
Abstract
© 2020 The Authors. Published by Elsevier B.V. This study reports in-situ cesium-doped graphene (G/Cs) coating obtained by introducing Cs2CO3 into the atmospheric pressure chemical vapor deposition (APCVD) furnace during graphene deposition on copper. The successful Cs-doping of the graphene coating was confirmed via X-ray photoelectron spectroscopy (XPS). As compared to the spectra of pure graphene coating, the XPS spectra of the G/Cs coating revealed a shift of the C1s and Cs3d5/2 peaks to higher and lower binding energies, respectively; thus, implying the n-type character of the doping and indicating a charge transfer between Cs and graphene. Raman results show that a pure graphene coating is composed of fewer layers, fewer defects, and larger domain size than the G/Cs coating. Ultraviolet photoelectron spectroscopy was utilized to study the work function of graphene and the G/Cs and revealed that doping graphene with Cs dopants reduced the work function of graphene by 1.2 eV. Electrochemical testing during 15-day immersion in 0.1 M NaCl indicated the destructive effect of the G/Cs coating on the Cu substrate. The results showed that the G/Cs coating exhibits a higher corrosion rate and lower corrosion resistance than even the bare metal itself
URI
https://pr.ibs.re.kr/handle/8788114/8459
DOI
10.1016/j.jmrt.2020.06.091
ISSN
2238-7854
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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