Photochemical generation of bis-hexahapto chromium interconnects between the graphene surfaces of single-walled carbon nanotubes
Photochemical generation of bis-hexahapto chromium interconnects between the graphene surfaces of single-walled carbon nanotubes
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DOI：
10.1039/c4mh00192c
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发表时间：
2015
影响因子：
13.3
通讯作者：
Á. Pekker;Mingguang Chen;E. Bekyarova;R. Haddon
中科院分区：
文献类型：
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作者：
Á. Pekker;Mingguang Chen;E. Bekyarova;R. Haddon
高真空电子束沉积过渡金属可以显著提高单壁碳纳米管（SWNT）网络的导电性。在本通信中，我们证明，它是可能的，以完成相同的化学功能化反应在室温下开始与简单的有机金属前体。结果表明，Cr（CO）6、Cr（η6-benzene）（CO）3和Cr（η6-benzene）2溶液与半导体薄膜、金属薄膜和非分离的单壁碳纳米管薄膜的光化学诱导反应都导致了强烈增强的电导率，这三种有机金属试剂对每种单壁碳纳米管类型都产生了一致的结果。我们的结论是，所有这三个反应导致共价（η6-SWNT）Cr（η6-SWNT）互连的产生，其在SWNT膜中提供导电路径，并且我们的结果拓宽了过渡金属双六键作为石墨烯表面之间的电子共轭键的适用性。
The electrical conductivity of single-walled carbon nanotube (SWNT) networks is strongly enhanced by the high vacuum e-beam deposition of transition metals. In the present communication we demonstrate that it is possible to accomplish the same chemical functionalization reactions at room temperature beginning with simple organometallic precursors. We show that the photochemically induced reactions of solutions of Cr(CO)6, Cr(η6-benzene)(CO)3, and Cr(η6-benzene)2 with thin films of semiconducting, metallic and non-separated SWNT films all lead to strongly enhanced conductivities which produce consistent results for each SWNT type among the three organometallic reagents. We conclude that all three of these reactions lead to the generation of covalent (η6-SWNT)Cr(η6-SWNT) interconnects which provide conducting pathways in the SWNT films and our results broaden the applicability of the transition metal bis-hexahapto-bond as an electronically conjugating linkage between graphene surfaces.