The effect of multi-step Cu surface oxidization on growth of single crystal graphene by low pressure chemical vapor deposition

ORAL

Abstract

There has been much recent interest in the growth large area single crystal graphene flakes as an approach for overcoming the relatively low carrier mobility and the multigrain structure observed in Chemical Vapor Deposition (CVD) graphene. [1] One approach for growing large-sized single crystal graphene by CVD, [2] involves limiting the nucleation density of graphene on the copper foil surface that is often used as a catalyst for the growth of CVD graphene. Here, we report the results of a study of CVD growth of graphene following surface modification of the copper foil by oxidizing the copper foil at different stages of the growth process. Thus, we detail the effect of copper surface oxidization at different steps of the growth for controlling the nucleation on the size and the quality of relatively large sized single crystal graphene flakes. The graphene layers are characterized by various methods and the results of the study are reported.

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Presenters

  • Sajith Withanage

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

Authors

  • Sajith Withanage

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • Tharanga Nanayakkara

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • Binuka Gunawardana

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • C. Rasadi Munasinghe

    Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • U. Kushan Wijewardena

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • Rasanga Samaraweera

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University, Georgia State University

  • Annika Kriisa

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Georgia State University, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University

  • Ramesh Mani

    Physics and Astronomy, Georgia State University, Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA, Georgia State University, Department of Physics and Astronomy, Georgia State University, Physics & Astronomy, Georgia State University