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Materials (Basel). 2018 Jan 12;11(1). pii: E116. doi: 10.3390/ma11010116.

Electrostatic Deposition of Large-Surface Graphene.

Author information

1
Department of Electrical Engineering, École de Technologie Supérieure, 1100 Notre-Dame Ouest, Montréal, QC H3C 1K3, Canada. charlestrudeau4@gmail.com.
2
R&D Department, Phonon Etc., 5795 Avenue de Gaspé, Montréal QC H2S 2X3, Canada. lidion.bertrand@photonetc.com.
3
Department of Mechanical Engineering, McGill University, 845 Sherbrook Ouest, Montréal QC H3A 0G4, Canada. mukherjeeatom@gmail.com.
4
Department of Chemistry, Université de Montreal, 2900 Édouard-Montpetit, Montréal QC H3C 3J7, Canada. r.martel@umontreal.ca.
5
Department of Electrical Engineering, École de Technologie Supérieure, 1100 Notre-Dame Ouest, Montréal, QC H3C 1K3, Canada. sylvaing.cloutier@etsmtl.ca.

Abstract

This work describes a method for electrostatic deposition of graphene over a large area using controlled electrostatic exfoliation from a Highly Ordered Pyrolytic Graphite (HOPG) block. Deposition over 130 × 130 µm² with 96% coverage is achieved, which contrasts with sporadic micro-scale depositions of graphene with little control from previous works on electrostatic deposition. The deposition results are studied by Raman micro-spectroscopy and hyperspectral analysis using large fields of view to allow for the characterization of the whole deposition area. Results confirm that laser pre-patterning of the HOPG block prior to cleaving generates anchor points favoring a more homogeneous and defect-free HOPG surface, yielding larger and more uniform graphene depositions. We also demonstrate that a second patterning of the HOPG block just before exfoliation can yield features with precisely controlled geometries.

KEYWORDS:

Raman spectroscopy; electrostatic deposition; graphene

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