Influence of surface texture and composition on graphene growth by chemical vapor deposition on Cu�Ni alloys for field emission application

Suresh, KS and Lahiri, I and Kaur, G and Kumar, V and Bibhanshu, N (2020) Influence of surface texture and composition on graphene growth by chemical vapor deposition on Cu�Ni alloys for field emission application. In: ACS Applied Nano Materials, 3 (10). pp. 9804-9812.

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Abstract

The present investigation is aimed to find a thread between various surface textures of polycrystalline Cu�Ni alloys, in cold-rolled and annealed conditions, and the nature of graphene, grown by the chemical vapor deposition (CVD) method, on these substrates. High-quality graphene grown on Cu�Ni alloys was transferred to various nanostructures, such as CuO nanorods and carbon nanotubes, for field emission application. In this work, Cu�Ni (100Cu�0Ni, 84.65Cu�15.35Ni, 72.6Cu�27.4Ni, and 63Cu�37Ni) alloy buttons were prepared by arc melting, and texture in the samples were engineered by cold rolling (plastic deformation) and annealing (recrystallization) processes. Study of surface texture by X-ray method demonstrates characteristically different deformation and recrystallization texture components, compared to conventional rolling and annealing textures. The evolution of texture has been explained based on the effects of surface friction, shear stress, and addition of Ni. Unusual appearance of 111 orientations, though less in volume, after annealing at 1000 °C, was observed in Cu�Ni alloys through the suppression of cube texture component. The underlying deformation and recrystallization mechanisms are explained through the changes in strain hardening, extended recovery, and continuous recrystallization effects. The effects of Ni content are correlated with the number of graphene layers, while an increase in the fraction of 111 orientations could be linked with defect density in graphene layers. Results of the present study will be motivating for selection of various polycrystalline Cu�Ni alloys, with different surface textures, for controlling quality of graphene, synthesized by the chemical vapor deposition method. © 2020 American Chemical Society

Item Type:	Journal Article
Publication:	ACS Applied Nano Materials
Publisher:	American Chemical Society
Additional Information:	Copyright to this article belongs to American Chemical Society
Keywords:	Annealing; Cold rolling; Copper alloys; Copper oxides; Field emission; Graphene; Metal cladding; Nanorods; Nickel alloys; Recrystallization (metallurgy); Shear flow; Shear stress; Strain hardening; Textures, Annealing textures; Chemical vapor deposition methods; Continuous recrystallization; Conventional rolling; Field emission application; Recrystallization mechanisms; Recrystallization texture; Surface friction, Chemical vapor deposition
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	15 Jan 2021 06:04
Last Modified:	15 Jan 2021 06:04
URI:	http://eprints.iisc.ac.in/id/eprint/67197

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