高取向热解石墨的环氧键合和反向剥离制备大片状石墨烯
Large and Flat Graphene Flakes Produced by Epoxy Bonding and Reverse Exfoliation of Highly Oriented Pyrolitic Graphite
摘要：
我们提出了一种制造方法，该方法基于高度取向的热解石墨（HOPG）的厚样品的衬底结合，生产具有几层到单层的大而平的石墨烯薄片，然后将其受控剥离到几个到单个石墨烯原子层。由于石墨底层在剥离过程中紧密结合到基底上，因此获得的石墨烯薄片非常大且平坦，并且存在非常少的折叠和褶皱。横向尺寸为数十微米宽的单层石墨烯片的高出现率通过互补探针进行评估，所述互补探针包括空间分辨显微拉曼光谱、原子力显微镜和静电力显微镜。这种多用途的方法开辟了在任何基底上沉积石墨烯的方法，包括柔性基底。
英文摘要：
We present a fabrication method producing large and flat graphene flakes that have a few layers down to a single layer based on substrate bonding of a thick sample of highly oriented pyrolytic graphite (HOPG), followed by its controlled exfoliation down to the few to single graphene atomic layers. As the graphite underlayer is intimately bonded to the substrate during the exfoliation process, the obtained graphene flakes are remarkably large and flat and present very few folds and pleats. The high occurrence of single layered graphene sheets having tens of micron wide in lateral dimensions is assessed by complementary probes including spatially resolved Micro-Raman Spectroscopy, Atomic Force Microscopy and Electrostatic Force Microscopy. This versatile method opens the way of deposition of graphene on any substrates including flexible ones.
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