Selection of single-walled carbon nanotubes according to both their diameter and chirality via nanotweezers
Carbon nanotubes, nanotweezer, selective adsorption, density functional theory
Diameter- and chirality-dependent interactions between aromatic molecule-based nanotweezers and single-walled carbon nanotubes (SWNTs) are revealed by density functional theory calculations. We found that the threshold diameter of selected SWNTs is determined by the end-to-end distance of the nanotweezer. Large-diameter SWNTs are preferred by a nanotweezer with an obtuse folding angle, whereas small-diameter SWNTs are favored by a nanotweezer with an acute folding angle. The adsorption can be further stabilized by the orientational alignment of the hexagonal rings of the nanotweezer and the SWNT sidewall. Therefore, by taking advantage of the supramolecular recognition ability of the aromatic molecule-based nanotweezer, SWNTs can be enriched with both controllable diameter and chirality.
Tsinghua University Press
Jing Zhou,Hong Li,Jing Lu,Guangfu Luo,Lin Lai,Rui Qin,Lu Wang,Shigeru Nagase,Zhengxiang Gao,Waining Mei,Guangping Li,Dapeng Yu,Stefano Sanvito, Selection of single-walled carbon nanotubes according to both their diameter and chirality via nanotweezers. NanoRes.2010, 3: 296–306