Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
ACS Nano. 2011 Feb 22;5(2):1042-6. doi: 10.1021/nn1025274. Epub 2011 Jan 4.
The manipulation of the bandgap of graphene by various means has stirred great interest for potential applications. Here we show that treatment of graphene with xenon difluoride produces a partially fluorinated graphene (fluorographene) with covalent C-F bonding and local sp(3)-carbon hybridization. The material was characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, electron energy loss spectroscopy, photoluminescence spectroscopy, and near edge X-ray absorption spectroscopy. These results confirm the structural features of the fluorographane with a bandgap of 3.8 eV, close to that calculated for fluorinated single layer graphene, (CF)(n). The material luminesces broadly in the UV and visible light regions, and has optical properties resembling diamond, with both excitonic and direct optical absorption and emission features. These results suggest the use of fluorographane as a new, readily prepared material for electronic, optoelectronic applications, and energy harvesting applications.
通过各种手段对石墨烯带隙的操控引起了人们极大的兴趣，因为这可能带来潜在的应用。在这里我们展示了用氙二氟化物处理石墨烯可以得到部分氟化的石墨烯（氟化石墨烯），其中碳原子通过共价键 C-F 键合，并发生局部 sp(3)-杂化。通过傅里叶变换红外光谱、拉曼光谱、电子能量损失光谱、光致发光光谱和近边 X 射线吸收光谱对材料进行了表征。这些结果证实了氟代石墨烯的结构特征，其带隙为 3.8eV，接近于氟化单层石墨烯 (CF)(n) 的计算值。该材料在紫外光和可见光区域广泛发光，并且具有类似于金刚石的光学性质，具有激子和直接光吸收和发射特征。这些结果表明氟代石墨烯可作为一种新的、易于制备的材料，用于电子、光电应用和能量收集应用。
