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arXiv 1302.0179cond-mat.mtrl-sci
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催化化学气相沉积石墨烯自限性生长模型

Modeling of the self-limited growth in catalytic chemical vapor deposition of graphene

HoKwon Kim, Eduardo Saiz, Manish Chhowalla, Cecilia Mattevi

摘要:

鉴于其潜在应用,晶片级连续单晶石墨烯层的开发是关键。为此,在这里,我们铺平了道路的朗缪尔吸附理论和二维结晶的框架中的石墨烯生长模型。具体而言,我们使用甲烷作为碳前体来模拟石墨烯在铜上的成核和生长。该模型导致识别的范围内的生长参数(温度和气体压力),唯一需要最终的表面覆盖的石墨烯。这成为解决多晶石墨烯层的连续性和晶粒尺寸的基本问题的宝贵工具。该模型与文献中现有的实验数据一致。在这里开发的石墨烯生长的“等高线图”和大石墨烯晶粒的优化生长的现有证据的基础上,为工程晶片级连续石墨烯膜提供了新的见解。

英文摘要:

The development of wafer-scale continuous single-crystal graphene layers is key in view of its prospective applications. To this end, here we pave the way for a graphene growth model in the framework of the Langmuir adsorption theory and two dimensional crystallization. In specific, we model the nucleation and growth of graphene on copper using methane as carbon precursor. The model leads to identification of the range of growth parameters (temperature and gas pressures) that uniquely entails the final surface coverage of graphene. This becomes an invaluable tool to address the fundamental problems of continuity of polycrystalline graphene layers, and crystalline grain dimensions. The model shows agreement with the existing experimental data in the literature. On the basis of the "contour map" for graphene growth developed here and existing evidence of optimized growth of large graphene grains, novel insights for engineering wafer-scale continuous graphene films are provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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