ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Carbon nanotubes present interesting potential applications especially in nanoelectronics.Their electrical properties are known to be a function of their chirality. It happens that 1/3 of CNsare metallic and 2/3 are semiconductors. Narrow nanotubes are expected to be wide-band gapsemiconductors. Several experimental results have shown that the thickness of a multi-wallnanotube along the axis can change, while the interlayer spacing remains fairly constant. Theseobservations suggest the coexistence in the same tube of a scroll structure and a multi-wall nestedtube. We explain this defect as a screw dislocation which by gliding transforms between these twoforms. In this paper, we present a density functional theory study of the structure and energetics ofscrew dislocations in AA and ABC graphite, and we discuss their role in the scroll-to-nanotubetransformation in multi-wall nanotubes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.527-529.1583.pdf
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