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Growth of Continuous Monolayer Graphene with Millimeter-sized Domains Using Industrially Safe Conditions

We demonstrate the growth of continuous monolayer graphene films with millimeter-sized domains on Cu foils under intrinsically safe, atmospheric pressure growth conditions, suitable for application in roll-to-roll reactors. Previous attempts to grow large domains in graphene have been limited to iso...

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Detalles Bibliográficos
Autores principales: Wu, Xingyi, Zhong, Guofang, D'Arsié, Lorenzo, Sugime, Hisashi, Esconjauregui, Santiago, Robertson, Alex W., Robertson, John
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4756286/
https://www.ncbi.nlm.nih.gov/pubmed/26883292
http://dx.doi.org/10.1038/srep21152
Descripción
Sumario:We demonstrate the growth of continuous monolayer graphene films with millimeter-sized domains on Cu foils under intrinsically safe, atmospheric pressure growth conditions, suitable for application in roll-to-roll reactors. Previous attempts to grow large domains in graphene have been limited to isolated graphene single crystals rather than as part of an industrially useable continuous film. With both appropriate pre-treatment of the Cu and optimization of the CH(4) supply, we show that it is possible to grow continuous films of monolayer graphene with millimeter scale domains within 80 min by chemical vapour deposition. The films are grown under industrially safe conditions, i.e., the flammable gases (H(2) and CH(4)) are diluted to well below their lower explosive limit. The high quality, spatial uniformity, and low density of domain boundaries are demonstrated by charge carrier mobility measurements, scanning electron microscope, electron diffraction study, and Raman mapping. The hole mobility reaches as high as ~5,700 cm(2) V(−1) s(−1) in ambient conditions. The growth process of such high-quality graphene with a low H(2) concentration and short growth times widens the possibility of industrial mass production.