Huc Vincent, Bendiab Nedjma, Rosman Noël, Ebbesen Thomas, Delacour Cécile, Bouchiat Vincent
ICMMO-CNRS, Université Paris-Sud, F-91405 Orsay, France.
Nanotechnology. 2008 Nov 12;19(45):455601. doi: 10.1088/0957-4484/19/45/455601. Epub 2008 Oct 9.
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 being tens of microns 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 for deposition of graphene on any substrates, including flexible ones.
我们提出了一种制备大尺寸且平整的石墨烯薄片的方法，该方法基于对高度取向热解石墨（HOPG）厚样品进行基底键合，然后将其可控剥离至几层到单层的石墨烯原子层。由于在剥离过程中石墨底层与基底紧密键合，所获得的石墨烯薄片非常大且平整，几乎没有褶皱。通过包括空间分辨微拉曼光谱、原子力显微镜和静电力显微镜在内的互补探针评估了横向尺寸达数十微米的单层石墨烯片的高出现率。这种通用方法为在任何基底（包括柔性基底）上沉积石墨烯开辟了道路。
