The effect of catalytic copper pretreatments on CVD graphene growth at different stages.

Nanotechnology
Na LiLi-Min He

Abstract

The controllable synthesis of high-quality and large-area graphene by chemical vapor deposition (CVD) remains a challenge nowadays. The massive grain boundaries in graphene grown on polycrystalline Cu by CVD significantly reduce its carrier mobility, limiting its application in high-performance electronic devices. Here, we confirm that the synergetic pretreatment of Cu with electropolishing and surface oxidation is a more efficient way to further suppress the graphene nucleation density (GND) and to accelerate the growth rate of the graphene domain by CVD. With increasing the growth time, we found that the increasing amount of GND and growth rate of the graphene domain were both decreasing during the whole CVD process when the Cu surface was not oxidized. By contrast, they kept growing over time when the Cu surface was pre-oxidized, which suggested that the change trends of the effects on the GND and growth rate between the Cu surface morphology and oxygen were opposite in the CVD process. In addition, not only the domain shape, but the number of graphene domain layers were impacted as well, and a large number of irregular ellipse graphene wafers with dendritic multilayer emerged when the Cu surface was oxidized.

References

Oct 23, 2004·Science·K S NovoselovA A Firsov
Feb 17, 2007·Science·K S NovoselovA K Geim
Apr 9, 2008·Nature Materials·Peter W SutterEli A Sutter
Jul 26, 2008·Nature Nanotechnology·Dan LiGordon G Wallace
Feb 12, 2009·ACS Nano·Han HuangAndrew Thye Shen Wee
Apr 8, 2009·Nature Nanotechnology·Sungjin Park, Rodney S Ruoff
Aug 29, 2009·Nano Letters·Xuesong LiRodney S Ruoff
Jun 22, 2010·Nature Nanotechnology·Sukang BaeSumio Iijima
Jun 25, 2010·Advanced Materials·Dacheng Wei, Yunqi Liu
Aug 24, 2010·Nature Materials·Oleg V Yazyev, Steven G Louie
Jan 7, 2011·Nature·Pinshane Y HuangDavid A Muller
Feb 12, 2011·Journal of the American Chemical Society·Xuesong LiRodney S Ruoff
Mar 29, 2011·Nano Letters·W StrupinskiJ M Baranowski
Aug 26, 2011·Nano Letters·Gang Hee HanYoung Hee Lee
Mar 27, 2012·ACS Nano·HoKwon KimEduardo Saiz
Oct 13, 2012·Nature·K S NovoselovK Kim
Jun 28, 2013·Nature Communications·Hailong ZhouXiangfeng Duan
Jun 7, 2014·Advanced Materials·Aron W CummingsStephan Roche
Jan 31, 2017·Chemistry of Materials : a Publication of the American Chemical Society·Philipp Braeuninger-WeimerStephan Hofmann

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