International Center for Young Scientists, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
Nanotechnology. 2010 Jul 2;21(26):265705. doi: 10.1088/0957-4484/21/26/265705. Epub 2010 Jun 10.
Because of its unique electronic transport properties, graphene has attracted an enormous amount of interest recently. By using standard Auger electron spectroscopy and Raman spectroscopy, we have studied electron-beam irradiation effects on graphene damage. We have shown that irradiation with an electron-beam can selectively remove graphene layers and induce chemical reactions, as well as possible structural transformations. We have also demonstrated the dependence of damage in graphene on electron-beam dose. Our work provides ideas on how to optimize the experimental conditions for graphene characterization and device fabrication. The results throw light on how energy transfer from the electron beam to graphene layers leads to the removal of carbon atoms from graphene layers and on the possibility of using electron-beam irradiation to locally induce chemical reactions in a controlled manner.
由于其独特的电子输运性质，石墨烯最近引起了极大的兴趣。我们使用标准的俄歇电子能谱和拉曼光谱研究了电子束辐照对石墨烯损伤的影响。结果表明，电子束辐照可以选择性地去除石墨烯层并诱导化学反应，以及可能的结构转变。我们还证明了石墨烯损伤对电子束剂量的依赖性。我们的工作为优化石墨烯表征和器件制备的实验条件提供了思路。结果揭示了电子束向石墨烯层传递能量如何导致碳原子从石墨烯层中去除，以及使用电子束辐照以可控的方式局部诱导化学反应的可能性。
