A Controllable Preparation Method for IC-Oriented Large Scale Single Crystal Graphene

doi:10.7652/xjtuxb201406018

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A Controllable Preparation Method for IC-Oriented Large Scale Single Crystal Graphene

更新时间：2025-07-09

- A Controllable Preparation Method for IC-Oriented Large Scale Single Crystal Graphene
- Vol. 48, Issue 6, Pages: 103-109(2014)
- 作者机构：
  
  西安交通大学电子与信息工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201406018
  CLC： TN304.9
- Online First：10 June 2014，
  
  Published：2014
- 稿件说明：
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A Controllable Preparation Method for IC-Oriented Large Scale Single Crystal Graphene[J]. 2014, 48(6): 103-109.
DOI：

A Controllable Preparation Method for IC-Oriented Large Scale Single Crystal Graphene[J]. 2014, 48(6): 103-109. DOI： 10.7652/xjtuxb201406018.

摘要

提出一种采用化学气相沉积工艺进行大面积单晶结构石墨烯岛的可控制备方法。在Ar环境中通过控制退火时间、生长温度来控制石墨烯岛的成核密度和生长形态; 采用FeCl

溶液对衬底表面预处理并调控H

与CH

的流量比来改善石墨烯岛的分形; 延长生长时间来扩大单晶石墨烯岛尺寸。实验结果表明:该制备方法可以控制石墨烯具有四边形、六边形、搭叠形等不同形态

可以控制四边形石墨烯由狭长型、燕翅型、蝴蝶型最终过渡到饱满的无分形结构的正方形形态

可以将六边形石墨烯岛尺寸从几十微米扩大到200微米以上

并且得到双层搭叠型六边形石墨烯; 采用该方法生长出来的单晶石墨烯可以避免连续多晶石墨烯的边界散射效应

保持较高的迁移率

且尺寸较大

具有单原子层结构和不同的生长形态

解决了集成电路所需要的百微米以上量级的单晶结构、晶格取向一致的石墨烯的制造问题。

Abstract

A controllable preparation method for synthesizing hundreds of micro-sized single-crystal grapheme is proposed by regulating the process of chemical vapor deposition. Nucleation density and morphology of graphene is controlled by annealing time and temperature in Ar atmosphere. Fractal structure of grapheme is improved by using substrate pretreatment by FeCl

and controlling ratio of H

and CH

flows

and the size of graphene is increased by extending growth time. Experimental results show that the proposed method could control the graphene with different structure such as quadrilaterals

hexagons

and stacks. Quadrilateral graphene could be controlled from fractal structure wi

th narrow

swallow wings

or butterfly to non-fractal structure in square. The size of hexagon graphene can be increased from dozens of micron to more than 200 microns

and stacked graphene is obtained. It is expected that graphene with single atomic layer structure and high charge carrier mobility will solve the integrated circuits problem for hundred micron scale single crystal graphene with consistent lattice orientations.

关键词

Keywords

references

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