Bottom up fabrication of (9,0) zigzag and (6,6) armchair carbon nanotube end-caps on the Rh(111) surface
Bottom up fabrication of (9,0) zigzag and (6,6) armchair carbon nanotube end-caps on the Rh(111) surface
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DOI：
10.1016/j.carbon.2014.12.038
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发表时间：
2015-04
期刊：
影响因子：
10.9
通讯作者：
N. Abdurakhmanova;A. Mueller;S. Stepanow;S. Rauschenbach;M. Jansen;K. Kern;K. Amsharov
中科院分区：
文献类型：
--
作者：
N. Abdurakhmanova;A. Mueller;S. Stepanow;S. Rauschenbach;M. Jansen;K. Kern;K. Amsharov
单壁碳纳米管(SWCNTs)的探索和广泛应用要求开发新的合成方法，使其能够方便和完全合理地制备碳纳米管。本文报道了利用表面辅助环脱氢法在Rh(1+1+1)单晶表面转化生成(9，0)锯齿形碳纳米管和(6，6)扶手椅形碳纳米管的两种前驱体。转换效率接近100%，碳纳米管在Rh表面的热稳定性高达820K，这对于后续的单壁碳纳米管生长是足够高的。结果表明，Rh是表面辅助自下而上可控合成单壁碳纳米管的合适催化剂。
The exploration and wide application of single walled carbon nanotubes (SWCNTs) require the development of new synthetic approaches enabling facile and fully rational CNT fabrication. In this communication the conversion of two precursors yielding the potential CNT seeds of (9, 0) zigzag and (6, 6) armchair nanotubes using surface-assisted cyclodehydrogenation on the Rh(1 1 1) single-crystal surface is reported. The conversion efficiency found is nearly 100% and the CNT-caps remain thermally stable on the Rh surface up to 820 K which is high enough for subsequent SWCNT growth. It is shown that Rh is a suitable catalyst for the controllable synthesis of SWCNTs by the surface assisted bottom-up strategy.