Raman analysis of bilayer graphene film prepared on commercial Cu(0.5 at% Ni) foil

M. J. Madito; A. Bello; J. K. Dangbegnon; C. J. Oliphant; W. A. Jordaan; T. M. Masikhwa; D. Y. Momodu; N. Manyala

doi:10.1002/jrs.4848

journal article Dec 08, 2015

Raman analysis of bilayer graphene film prepared on commercial Cu(0.5 at% Ni) foil

M. J. Madito A. Bello

J. K. Dangbegnon C. J. Oliphant W. A. Jordaan T. M. Masikhwa D. Y. Momodu N. Manyala

Journal of Raman Spectroscopy Vol. 47 No. 5 pp. 553-559 · Wiley

View at Publisher Save 10.1002/jrs.4848

Abstract

This study reports the Raman analysis of bilayer graphene films prepared on commercial dilute Cu(0.5 at% Ni) foils using atmospheric pressure chemical vapor deposition. A bilayer graphene film obtained on Cu foil is known to have small areas of bilayer (islands) with a significant fraction of non‐Bernal stacking, while that obtained on Cu/Ni is known to grow over a large area with Bernal stacking. In the Raman optical microscope images, a wafer‐scale monolayer and large‐area bilayer graphene films were distinguished and confirmed with Raman spectra intensities ratios of 2D to G peaks. The large‐area part of bilayer graphene film obtained was assisted by Ni surface segregation because Ni has higher methane decomposition rate and carbon solubility compared with Cu. The Raman data suggest a Bernal stacking order in the prepared bilayer graphene film. A four‐point probe sheet resistance of graphene films confirmed a bilayer graphene film sheet resistance distinguished from that of monolayer graphene. A relatively higher Ni surface concentration in Cu(0.5 at% Ni) foil was confirmed with time‐of‐flight secondary ion mass spectrometry. The inhomogeneous distribution of Ni in a foil and the diverse crystallographic surface of a foil (confirmed with proton‐induced X‐ray emission and electron backscatter diffraction, respectively) could be a reason for incomplete wafer‐scale bilayer graphene film. The Ni surface segregation in dilute Cu(0.5 at% Ni) foil has a potential to impact on atmospheric pressure chemical vapor deposition growth of large‐area bilayer graphene film. Copyright © 2015 John Wiley & Sons, Ltd.

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References

Details

Published: Dec 08, 2015
Vol/Issue: 47(5)
Pages: 553-559
License: View

Authors

M

M. J. Madito

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

A

A. Bello

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

J

J. K. Dangbegnon

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

C

C. J. Oliphant

National Metrology Institute of South Africa Private Bag X34, Lynwood Ridge Pretoria 0040 South Africa

W

W. A. Jordaan

National Metrology Institute of South Africa Private Bag X34, Lynwood Ridge Pretoria 0040 South Africa

T

T. M. Masikhwa

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

D

D. Y. Momodu

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

N

N. Manyala

Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials University of Pretoria Pretoria 0028 South Africa

Funding

University of Pretoria

Cite This Article

M. J. Madito, A. Bello, J. K. Dangbegnon, et al. (2015). Raman analysis of bilayer graphene film prepared on commercial Cu(0.5 at% Ni) foil. Journal of Raman Spectroscopy, 47(5), 553-559. https://doi.org/10.1002/jrs.4848

Raman analysis of bilayer graphene film prepared on commercial Cu(0.5 at% Ni) foil

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