title: Sorting out semiconducting single-walled carbon nanotube arrays by washing off metallic tubes using SDS aqueous solution.
abstract: Semiconducting single-walled carbon nanotube (s-SWNT) arrays are produced via a procedure analogous to a surfactant-assisted decontamination process. Aligned individual SWNT arrays grow on a quartz surface as a mixture of metallic SWNTs (m-SWNTs) and s-SWNTs. They are immersed in a sodium dodecyl sulfate (SDS) solution, and the SDS molecules selectively adsorb onto m-SWNTs. This SDS coating minimizes the interaction between m-SWNTs and the substrate, thus the m-SWNTs are easily washed off during ultrasonication while the s-SWNT arrays remain on the substrate. The percentage of s-SWNTs in the arrays can be higher than 90%.
authors.affiliation: Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Hu
authors.forename: Yabin
authors.initials: Y
authors.lastname: Chen
authors.forename: Pan
authors.initials: P
authors.lastname: Li
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang