石墨烯
材料科学
成核
单层
薄脆饼
化学气相沉积
基质(水族馆)
纳米技术
合金
化学工程
复合材料
化学
有机化学
地质学
工程类
海洋学
作者
Tianru Wu,Xuefu Zhang,Qinghong Yuan,Jiachen Xue,Guangyuan Lu,Zhihong Liu,Huishan Wang,Haomin Wang,Feng Ding,Qingkai Yu,Xiaoming Xie,Mianheng Jiang
出处
期刊:Nature Materials
[Springer Nature]
日期:2015-11-23
卷期号:15 (1): 43-47
被引量:520
摘要
Wafer-scale single-crystalline graphene monolayers are highly sought after as an ideal platform for electronic and other applications. At present, state-of-the-art growth methods based on chemical vapour deposition allow the synthesis of one-centimetre-sized single-crystalline graphene domains in ∼12 h, by suppressing nucleation events on the growth substrate. Here we demonstrate an efficient strategy for achieving large-area single-crystalline graphene by letting a single nucleus evolve into a monolayer at a fast rate. By locally feeding carbon precursors to a desired position of a substrate composed of an optimized Cu-Ni alloy, we synthesized an ∼1.5-inch-large graphene monolayer in 2.5 h. Localized feeding induces the formation of a single nucleus on the entire substrate, and the optimized alloy activates an isothermal segregation mechanism that greatly expedites the growth rate. This approach may also prove effective for the synthesis of wafer-scale single-crystalline monolayers of other two-dimensional materials.
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