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Band-gap sensitive adsorption of fluorine molecules on sidewalls of carbon nanotubes: An ab initio study

Title
Band-gap sensitive adsorption of fluorine molecules on sidewalls of carbon nanotubes: An ab initio study
Authors
Choi W.I.Park S.Kim T.-E.Park N.Lee K.-R.Lee Y.H.Ihm J.Han S.
Ewha Authors
한승우
Issue Date
2006
Journal Title
Nanotechnology
ISSN
0957-4484JCR Link
Citation
vol. 17, no. 23, pp. 5862 - 5865
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report from ab initio calculations that the band-gap sensitive side-wall functionalization of a carbon nanotube is feasible with the fluorine molecule (F2), which can provide a route to the extraction of semiconducting nanotubes by etching away metallic ones. In the small diameter cases like (11, 0) and (12, 0), the nanotubes are easily functionalized with F2 regardless of their electronic properties. As the diameter becomes larger, however, the fluorination is favoured on metallic CNTs with smaller activation barriers than those of semiconducting ones. Our results suggest that low-temperature exposure to F2 molecules in the gas phase can make a dominant portion of fluorinated metallic nanotubes and unfluorinated semiconducting ones. This is consistent with recent experimental reports. © 2006 IOP Publishing Ltd.
DOI
10.1088/0957-4484/17/23/025
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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