几层石墨片与FeCl3的间隙:法尔米水平的拉曼确定,层次的分离和稳定性
Weijie Zhao1, Ping Heng Tan, Jian Liu
1State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Journal of the American Chemical Society
|March 26, 2011
概括
研究人员使用铁化物对石墨烯进行了化,产生了介质化合物. 多带拉曼光谱学精确测量了这些合石墨烯材料中的费米水平变化.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 石墨烯的独特电子特性对兴奋剂非常敏感.
- 控制和描述石墨烯中兴奋剂水平对于设备应用至关重要.
- 互化合物为修改石墨烯电子结构提供了一个有前途的途径.
研究的目的:
- 使用无水铁化物 (FeCl(3) 合石墨片和多石墨烯单层.
- 通过拉曼光谱学来表征由此产生的间化合物 (ICs).
- 建立一种方法来精确测量合石墨烯中的费米水平变化.
主要方法:
- 石墨片 (2-4 个石墨烯层) 的间隙和石墨烯单层的合FeCl(3).
- 使用拉曼散射的介质化化合物的表征.
- 多波长拉曼光谱分析兴奋剂效应和测量费米水平变化.
主要成果:
- 在G峰值 (∼1627cm(-1)) 中观察到显著的上升偏移,对于强度合的单层石墨烯和2-4层ICs.
- 证明了多层IC中的每个层都表现得像一个解的,高度杂的单层.
- 展示了保利阻断对二维峰值抑制的影响,并使费米水平偏移估计高达0.9 eV.
结论:
- FeCl ((3) 间化合物对强烈染石墨烯有效.
- 多波长拉曼光谱为费米水平的确定提供了直接和互补的方法.
- 这些IC作为有价值的平台来研究强度合石墨烯的特性.
相关概念视频
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