Abstract How to control the orientations of single-walled carbon nanotubes (SWCNTs) on surface is the key point to controlling their geometries. In this work, we chose quartz (0 0 1), MgO (0 0 1) and layered mica with 3-, 4- and 6-fold symmetry, respectively as substrates to grow SWCNTs using gas-flow and lattice-directed modes. The produced SWCNTs were aligned along the symmetrical directions and displayed the homologous angles of 120°, 90° and 60° during growth on quartz (0 0 1), MgO (0 0 1) and mica surfaces, respectively. The obtained SWCNTs with controlled geometries would have wide applications in nanoelectronic devices in the future.

中文翻译：

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表面可控几何形状的单壁碳纳米管的晶格定向生长

摘要 如何控制单壁碳纳米管（SWCNTs）在表面的取向是控制其几何形状的关键。在这项工作中，我们分别选择石英 (0 0 1)、MgO (0 0 1) 和具有 3、4 和 6 倍对称性的层状云母作为衬底，使用气流和晶格定向模式生长 SWCNT。制备的 SWCNT 沿对称方向排列，并在石英 (0 0 1)、MgO (0 0 1) 和云母表面生长过程中分别显示出 120°、90° 和 60° 的同源角。获得的具有受控几何形状的 SWCNT 将在未来在纳米电子器件中具有广泛的应用。