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Detecting and Tuning the Interactions between Surfactants and Carbon Nanotubes for Their High‐Efficiency Structure Separation
Author(s) -
Zeng Xiang,
Yang Dehua,
Liu Huaping,
Zhou Naigen,
Wang Yanchun,
Zhou Weiya,
Xie Sishen,
Kataura Hiromichi
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201700727
Subject(s) - carbon nanotube , materials science , selectivity , sodium dodecyl sulfate , pulmonary surfactant , chirality (physics) , adsorption , molecule , chemical engineering , enantiomer , hydrophobic effect , selective adsorption , chromatography , nanotechnology , organic chemistry , chemistry , catalysis , chiral symmetry breaking , physics , quantum mechanics , quark , nambu–jona lasinio model , engineering
The selective interaction is systematically explored between the surfactants (sodium deoxycholate (DOC), sodium dodecyl sulfate (SDS), and sodium cholate (SC)) and the single‐wall carbon nanotubes (SWCNTs) by the gel chromatography technique. The results show that DOC preferentially interacts with small‐diameter semiconducting SWCNTs (S‐SWCNTs), exhibiting the strongest interaction strength for the SWCNTs, and the highest structural selectivity. The surfactant SC shows high selectivity toward the chiral angles of the SWCNTs. Its interaction strength and structural recognition ability are slightly higher than that of SDS but lower than that of DOC. Combining with the proved selectivity of SDS in the adsorption onto the S‐SWCNTs with small CC bond curvature, it is discovered that the synergistic effect of the triple surfactants amplified the interaction difference among the different SWCNTs and the gel, and thus dramatically improved the separation efficiency and structural purity of the SWCNTs, achieving the separation of distinct ( n , m ) single‐chirality species and their enantiomers in one step. This work not only provides deeper insights into the separation mechanism of SWCNTs with the surfactant sorting techniques, but also has a profound significance in studying the interaction between the SWCNTs and other small molecules.