Narrow graphene nanoribbons from carbon nanotubes
Narrow graphene nanoribbons from carbon nanotubes
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DOI：
10.1038/nature07919
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发表时间：
2009-04-16
期刊：
影响因子：
64.8
通讯作者：
Dai, Hongjie
中科院分区：
文献类型：
--
作者：
Jiao, Liying;Zhang, Li;Dai, Hongjie
石墨烯纳米带（GNR）是具有不同于其他碳同素异形体的性质的材料（1-5）。亚10纳米GNR的全半导体性质可以绕过未来电子产品中碳纳米管（CNT）的金属或半导体性质的极端手性依赖性问题（1，2）。目前，使用光刻（3，4，6）、化学（7-9）或声化学（1）方法制造GNR具有挑战性。很难以高产量获得具有光滑边缘和可控宽度的GNR。在这里，我们展示了一种方法，使GNRs的解压缩多壁碳纳米管的等离子体蚀刻的纳米管部分嵌入在聚合物膜。GNR具有光滑的边缘和窄的宽度分布（10-20 nm）。拉曼光谱和电输运测量揭示了高质量的GNRs。将具有良好限定结构的CNT在阵列中解压缩将允许以可扩展的方式生产具有受控宽度、边缘结构、放置和对准的GNR以用于器件集成。
Graphene nanoribbons (GNRs) are materials with properties distinct from those of other carbon allotropes(1-5). The all-semiconducting nature of sub-10-nm GNRs could bypass the problem of the extreme chirality dependence of the metal or semiconductor nature of carbon nanotubes (CNTs) in future electronics(1,2). Currently, making GNRs using lithographic(3,4,6), chemical(7-9) or sonochemical(1) methods is challenging. It is difficult to obtain GNRs with smooth edges and controllable widths at high yields. Here we show an approach to making GNRs by unzipping multi-walled carbon nanotubes by plasma etching of nanotubes partly embedded in a polymer film. The GNRs have smooth edges and a narrow width distribution (10-20 nm). Raman spectroscopy and electrical transport measurements reveal the high quality of the GNRs. Unzipping CNTs with well-defined structures in an array will allow the production of GNRs with controlled widths, edge structures, placement and alignment in a scalable fashion for device integration.