Nanotube Arrays: Sorting out Semiconducting Single‐Walled Carbon Nanotube Arrays by Washing off Metallic Tubes Using SDS Aqueous Solution (Small 8/2013)

S-SWNT (red tubes) arrays are sorted on a quartz surface by J. Zhang and co-workers, who explain on page 1306 how to wash off the m-SWNTs (green tubes) using SDS (yellow particles) aqueous solution. The SDS molecules selectively adsorb onto m-SWNTs. The SDS coating layer then minimizes the interactions between m-SWNTs and the quartz substrate, thus allowing the m-SWNTs to be easily washed off by the assistance of ultrasonication while the s-SWNT arrays remain securely on the substrate.