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Journal Article
Research Support, Non-U.S. Gov't
The non-covalent functionalisation of carbon nanotubes studied by density functional and semi-empirical molecular orbital methods including dispersion corrections.
Physical Chemistry Chemical Physics : PCCP 2008 January 8
Density functional theory (DFT-D) and semi-empirical (PM3-D) methods having an added empirical dispersion correction have been used to study the binding of a series of small molecules and planar aromatic molecules to single-walled carbon nanotubes (CNTs). For the small molecule set, the PM3-D method gives a mean unsigned error (MUE) in the binding energies of 1.2 kcal mol(-1) when judged against experimental reference data for graphitic carbon. This value is close to the MUE for this method compared to high-level ab initio data for biological complexes. The PM3-D and DFT-D calculations describing the adsorption of the planar organic molecules (benzene, bibenzene, naphthalene, anthracene, TCNQ and DDQ) on the outer-walls of both semi-conducting and metallic CNTs give similar binding energies for benzene and DDQ, but do not display a stronger adsorption on [6,6] compared to [10,0] structures shown by another DFT study.
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