Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, PR China.
Chemistry. 2011 Aug 1;17(32):8896-903. doi: 10.1002/chem.201100699. Epub 2011 Jun 28.
The bandgap opening of graphene is extremely important for the expansion of the applications of graphene-based materials into optoelectronics and photonics. Current methods to open the bandgap of graphene have intrinsic drawbacks including small bandgap openings, the use hazardous/harsh chemical oxidations, and the requirement of expensive chemical-vapor deposition technologies. Herein, an eco-friendly, highly effective, low-cost, and highly scalable synthetic approach is reported for synthesizing wide-bandgap fluorinated graphene (F-graphene or or fluorographene) semiconductors under ambient conditions. In this synthesis, ionic liquids are used as the only chemical to exfoliate commercially available fluorinated graphite into single and few-layer F-graphene. Experimental and theoretical results show that the bandgap of F-graphene is largely dependent on the F coverage and configuration, and thereby can be tuned over a very wide range.
石墨烯的带隙打开对于将基于石墨烯的材料的应用扩展到光电学和光子学领域是极其重要的。目前打开石墨烯带隙的方法存在固有缺陷，包括带隙打开小、使用危险/苛刻的化学氧化、以及需要昂贵的化学气相沉积技术。在此，报道了一种在环境条件下合成具有宽带隙的氟化石墨烯（F-石墨烯或氟化石墨）半导体的环保、高效、低成本和高可扩展的合成方法。在这种合成中，离子液体被用作唯一的化学试剂，将商业上可获得的氟化石墨剥离成单层和少层 F-石墨烯。实验和理论结果表明，F-石墨烯的带隙在很大程度上取决于 F 的覆盖和构型，因此可以在很宽的范围内进行调节。
