Duan Tianbo, Li Hu, Leifer Klaus
Ångström Laboratory, Department of Materials Science and Engineering, Uppsala University, 75121 Uppsala, Sweden.
Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China.
Nanomaterials (Basel). 2022 Jan 24;12(3):383. doi: 10.3390/nano12030383.
The aging in air inevitably results in the accumulation of airborne hydrocarbon contaminations on a graphene surface, which causes considerable difficulties in the subsequent application of graphene. Herein, we report an electron-beam-activated fluorination/defluorination cycle for achieving a long-term preservation of CVD graphene. After experiencing such cycle, the accumulation of airborne hydrocarbon on the graphene surfaces is strongly reduced, and the initial chemical status of graphene can be restored, which is confirmed by employing atomic force microscopy and X-ray photoelectron microscopy. Our reported approach provides an efficient method for the cleaning and long-term preservation of graphene, and it is particularly useful for graphene microscopy characterizations.
在空气中老化不可避免地会导致石墨烯表面积累空气中的碳氢化合物污染物，这给石墨烯的后续应用带来了相当大的困难。在此，我们报道了一种电子束激活的氟化/脱氟循环，以实现化学气相沉积（CVD）石墨烯的长期保存。经历这样的循环后，石墨烯表面空气中碳氢化合物的积累会大大减少，并且石墨烯的初始化学状态可以恢复，这通过原子力显微镜和X射线光电子显微镜得到了证实。我们报道的方法为石墨烯的清洁和长期保存提供了一种有效方法，并且对石墨烯显微镜表征特别有用。
