Controlled Nanocutting of Graphene
Controlled Nanocutting of Graphene
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DOI：
10.1007/s12274-008-8020-9
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发表时间：
2008-08-01
期刊：
影响因子：
9.9
通讯作者：
Ajayan, Pulickel M.
中科院分区：
文献类型：
--
作者：
Ci, Lijie;Xu, Zhiping;Ajayan, Pulickel M.
基于石墨烯的应用的快速发展需要新的加工技术来制造具有不同形状、尺寸和边缘结构的石墨烯组件。在这里，我们报告了石墨烯片的受控切割过程，使用镍纳米颗粒作为纳米级精度切割的刀。切割通过石墨烯晶格的催化氢化进行，并且可以产生具有特定锯齿形或扶手椅边缘的石墨烯片。纳米颗粒的尺寸决定了切割过程中产生的边缘结构。切割沿着直线和沿着由60度或120度的角度限定的对称线发生，并且在自由边缘或缺陷处偏转，从而允许石墨烯纳米工程的实际控制。
Rapid progress in graphene-based applications is calling for new processing techniques for creating graphene components with different shapes, sizes, and edge structures. Here we report a controlled cutting process for graphene sheets, using nickel nanoparticles as a knife that cuts with nanoscale precision. The cutting proceeds via catalytic hydrogenation of the graphene lattice, and can generate graphene pieces with specific zigzag or armchair edges. The size of the nanoparticle dictates the edge structure that is produced during the cutting. The cutting occurs along straight lines and along symmetry lines, defined by angles of 60 degrees or 120 degrees, and is deflected at free edges or defects, allowing practical control of graphene nano-engineering.