Xu Yanfei, Huang Yi, Yan Weibo, Zhang Long, Chen Yongsheng
Key Laboratory of Functional Polymer Materials, Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
J Nanosci Nanotechnol. 2013 Feb;13(2):1116-9. doi: 10.1166/jnn.2013.5995.
A facile, low-cost and environmentally friendly method was developed to prepare processable graphene materials by direct exfoliation of expandable graphite flakes under wet ball milling conditions in ionic liquids. The graphene nano-sheets obtained in this method were characterized by AFM, Raman spectroscopy, UV-NIR. Thin-film field-effect transistors made from this graphene sheets exhibit ambipolar effect, an average hole mobility of -0.29 cm2 V(-1) s(-1), electron mobility of -0.57 cm2 V(-1) s(-1) was obtained.
开发了一种简便、低成本且环境友好的方法，通过在离子液体中湿球磨条件下直接剥离可膨胀石墨薄片来制备可加工的石墨烯材料。用原子力显微镜（AFM）、拉曼光谱、紫外-近红外光谱对该方法制备的石墨烯纳米片进行了表征。由这种石墨烯片制成的薄膜场效应晶体管表现出双极性效应，平均空穴迁移率为-0.29 cm² V⁻¹ s⁻¹，电子迁移率为-0.57 cm² V⁻¹ s⁻¹。
