†Centre for Nanoscale Science and Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide 5042, Australia.
‡Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany.
ACS Nano. 2015 Apr 28;9(4):3849-57. doi: 10.1021/nn506869h. Epub 2015 Mar 17.
In this work, we demonstrate the application of the gel permeation technique to the sorting of double-walled carbon nanotubes (DWCNTs) according to their outer wall electronic type. Our method uses Sephacryl S-200 gel and yields sorted fractions of DWCNTs with impurities removed and highly enriched in nanotubes with either metallic (M) or semiconducting (S) outer walls. The prepared fractions are fully characterized using optical absorption spectroscopy, transmission electron microscopy, and atomic force microscopy, and the entire procedure is monitored in real time using process Raman analysis. The sorted DWCNTs are then integrated into single nanotube field effect transistors, allowing detailed electronic measurement of the transconductance properties of the four unique inner@outer wall combinations of S@S, S@M, M@S, and M@M.
在这项工作中，我们展示了凝胶渗透技术在根据外管壁电子类型对双壁碳纳米管（DWCNT）进行分类中的应用。我们的方法使用 Sephacryl S-200 凝胶，得到了杂质去除且高度富集具有金属（M）或半导体（S）外管壁的 DWCNT 的分类馏分。使用光学吸收光谱、透射电子显微镜和原子力显微镜对制备的馏分进行全面表征，并使用过程拉曼分析实时监测整个过程。然后将分类的 DWCNT 集成到单根纳米管场效应晶体管中，允许对 S@S、S@M、M@S 和 M@M 这四种独特的内@外管壁组合的跨导特性进行详细的电子测量。
