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无氧化学蒸汽沉积的可再生石墨烯合成

Jacob Amontree¹, Xingzhou Yan¹, Christopher S DiMarco¹

¹Department of Mechanical Engineering, Columbia University, New York, NY, USA.

|May 29, 2024

概括

在化学蒸汽沉积 (CVD) 合成过程中消除微量氧显著提高了石墨烯的质量和可重复性. 无氧CVD (OF-CVD) 能产生高质量,无污染的石墨烯,适用于先进的应用.

科学领域:

材料科学
纳米技术
表面化学

背景情况:

化学蒸汽沉积 (CVD) 是铜上的石墨烯合成的主要方法.
复制性和质量的挑战限制了CVD-石墨烯的广泛应用.
微量杂质,特别是氧气,被怀疑会影响石墨烯的生长.

研究的目的:

确定微量氧在低压CVD石墨烯生长中的作用.
为改善石墨烯合成开发一种无氧CVD (OF-CVD) 方法.
在OF-CVD条件下培养的石墨烯的质量和特性.

主要方法:

使用低压CVD与没有微量氧的石墨烯生长的比较.
使用拉曼光谱和电导度测量分析石墨烯质量.
使用OF-CVD石墨烯的电子设备的制造和表征.

主要成果:

微量氧抑制核化,减缓生长,降低石墨烯质量 (污染,D峰值,导电性降低).
无氧CVD (OF-CVD) 能够快速,高度可重复的合成无污染的石墨烯.
在转移和封装后,OF-CVD石墨烯表现出卓越的室温传输特性和量子霍尔效应.

结论:

消除微量氧气对于获得高质量,可重复的CVD石墨烯至关重要.
OF-CVD为研究和应用提供了可扩展的高性能石墨烯途径.
这项工作为优化CVD反应器设计和运行提供了必要的指导.

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