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Visualizing copper assisted graphene growth in nanoscale

Rosmi, Mohamad Saufi and Yusop, Mohd. Zamri and Kalita, Golap and Yaakob, Yazid and Takahashi, Chisato and Tanemura, Masaki (2014) Visualizing copper assisted graphene growth in nanoscale. Scientific Reports, 4 . ISSN 2045-2322

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Official URL: http://dx.doi.org/10.1038/srep07563

Abstract

Control synthesis of high quality large-area graphene on transition metals (TMs) by chemical vapor deposition (CVD) is the most fascinating approach for practical device applications. Interaction of carbon atoms and TMs is quite critical to obtain graphene with precise layer number, crystal size and structure. Here, we reveal a solid phase reaction process to achieve Cu assisted graphene growth in nanoscale by in-situ transmission electron microscope (TEM). Significant structural transformation of amorphous carbon nanofiber (CNF) coated with Cu is observed with an applied potential in a two probe system. The coated Cu particle recrystallize and agglomerate toward the cathode with applied potential due to joule heating and large thermal gradient. Consequently, the amorphous carbon start crystallizing and forming sp2 hybridized carbon to form graphene sheet from the tip of Cu surface. Weobserved structural deformation and breaking of the graphene nanoribbon with a higher applied potential, attributing to saturated current flow and induced Joule heating. The observed graphene formation in nanoscale by the in-situ TEM process can be significant to understand carbon atoms and Cu interaction.

Item Type:Article
Uncontrolled Keywords:assisted graphene growth, nanoscale
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:63219
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:18 Jun 2017 06:52
Last Modified:18 Jun 2017 06:52

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