Electronic structure control of single-walled carbon nanotube functionalization
Electronic structure control of single-walled carbon nanotube functionalization
复制标题
DOI：
10.1126/science.1087691
复制
发表时间：
2003-09-12
期刊：
影响因子：
56.9
通讯作者：
Smalley, RE
中科院分区：
文献类型：
--
作者：
Strano, MS;Dyke, CA;Smalley, RE
重氮试剂对悬浮在水溶液中的单壁碳纳米管具有高选择性功能化，并能根据电子结构进行操作。例如，在受控条件下，金属物质会对半导体纳米管几乎不存在产生反应。选择性是由费米能级附近的电子的可用性决定的，以稳定键形成之前的电荷转移过渡态。这种化学反应可以通过热处理来逆转，从而恢复纳米管的原始电子结构。
Diazonium reagents functionalize single-walled carbon nanotubes suspended in aqueous solution with high selectivity and enable manipulation according to electronic structure. For example, metallic species are shown to react to the near exclusion of semiconducting nanotubes under controlled conditions. Selectivity is dictated by the availability of electrons near the Fermi level to stabilize a charge-transfer transition state preceding bond formation. The chemistry can be reversed by using a thermal treatment that restores the pristine electronic structure of the nanotube.