Abstract
We demonstrate direct growth of two-dimensional (2D) and three-dimensional (3D) graphene structures on glass substrates. By starting from catalytic copper nanoparticles of different densities and using chemical vapour deposition (CVD) techniques, different 2D and 3D morphologies can be obtained, including graphene sponge-like, nano-ball and conformal graphene structures. More important, we show that the initial copper template can be completely removed via sublimation during CVD and, if need be, subsequent metal etching. This allows optical transmissions close to the bare substrate, which, combined with electrical conductivity make the proposed technique very attractive for creating graphene with high surface to volume ratio for a wide variety of applications, including antiglare display screens, solar cells, light-emitting diodes, gas and biological plasmonic sensors.
Highlights
Graphene, a two-dimensional (2D) carbon material, has a wide variety of potential applications due to its unique electrical and optical properties, mechanical strength, flexibility and chemical stability. ceSince its discovery, several techniques have been developed to grow it with high quality and over large area substrates
It has been achieved by using an interfacial ultrathin metal film that acts as a catalyst and retracts during growth leaving graphene on the dielectric area
To demonstrate the versatility of the proposed technique, we investigated the ce growth of three graphene structures with different properties, optical, electrical and morphological, obtained by proper tailoring of the initial Cu template: (i) the arrangement of non-aggregated Cu nanoparticles (Cu NPs) in different layers that produced the formation of a 3D-G sponge-like structure (3D-GS); (ii) one layer of isolated Cu NPs that produced 3D-graphene nanoballs (3D-GB); Ac
Summary
A two-dimensional (2D) carbon material, has a wide variety of potential applications due to its unique electrical and optical properties, mechanical strength, flexibility and chemical stability. In the case of Cu, single layer graphene can grow in a controlled manner because of the adsorption mechanism due to low carbon solubility For this reason, 25 to 35 μm-thick Cu foils have become the standard surface for CVD or PECVD graphene growth [1]. More complex three dimensional (3D) structures with high quality and large surface-tovolume ratio have been obtained starting from 3D-shaped catalytic templates. It was us demonstrated a significant control of size and shape thanks to the catalyst morphology, which can be modified to obtain, for example, graphene spheres, tubes or networks [6,7]. The resulting high quality graphene nano-structures present low defects sites, high surface to volume ratio, high optical transmission while still preserving electrical properties
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
