Kavli Institute of Nanoscience, Delft Technical University, 2628 CJ Delft, The Netherlands.
Nano Lett. 2011 Jun 8;11(6):2446-50. doi: 10.1021/nl200873w. Epub 2011 May 16.
We report the translocation of individual single-wall carbon nanotubes (SWNTs) through solid-state nanopores. Single-strand DNA oligomers are used to both disperse the SWNTs in aqueous solution and to provide them with a net charge, allowing them to be driven through the nanopores by an applied electric field. The resulting temporary interruptions in the measured nanopore conductance provide quantitative information on the diameter and length of the translocated nanotubes at a single-molecule level. Furthermore, we demonstrate that the technique can be utilized to monitor bundling of SWNT in solution by using complementary nucleotides to induce tube-tube agglomeration.
我们报告了通过固态纳米孔实现的单个单壁碳纳米管（SWNTs）的转位。单链 DNA 寡核苷酸既用于在水溶液中分散 SWNTs，又为它们提供净电荷，从而可以通过施加的电场将它们驱动通过纳米孔。由此在测量的纳米孔电导中产生的临时中断，以单分子水平提供了转位纳米管的直径和长度的定量信息。此外，我们证明该技术可用于通过使用互补核苷酸来诱导管间团聚来监测溶液中 SWNT 的聚集。
