Advanced Nanotechnologies for Detection and Defence against CBRN Agents 2018, 229-238
Single-walled carbon nanotubes (SWCNTs) show either metallic or semiconducting character, and are potential candidates for the development of small electronic devices. However, commercial SWCNT materials consist of a mixture of many different SWCNT conformations and certain impurities. In this work, SWCNTs are dispersed in an aqueous medium, purified by centrifugation, and finally separated into metallic and semiconducting inks by a gel chromatography method. The separation is directly performed at ambient conditions, and the influence of the ink concentration and the chromatography column length are thoroughly evaluated. The most efficient separation, distinguishing between families of semiconducting SWCNT with different diameters, is achieved at the lowest concentration and with the longest column. These results provide a promising base for availability of SWCNTs with well-defined …
