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Sorting out Semiconducting Single‐Walled Carbon Nanotube Arrays by Washing off Metallic Tubes Using SDS Aqueous Solution
Author(s) -
Hu Yue,
Chen Yabin,
Li Pan,
Zhang Jin
Publication year - 2013
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201202940
Subject(s) - carbon nanotube , aqueous solution , materials science , metal , nanotechnology , chemical engineering , sorting , chemistry , organic chemistry , metallurgy , computer science , programming language , engineering
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%.