Carbon Nanotube Heterojunctions:
Nanoelectronic Devices
This is an abstract
for a talk to be given at the
Fifth
Foresight Conference on Molecular Nanotechnology.
There will be a link from here to the full article when it is
available on the web.
Structural stability of various nanotube junctions are
investigated using a generalized tight-binding molecular dynamics
(GTBMD) scheme that incorporates non-orthogonality of the
orbitals. The junctions investigated include straight and
small-angle hetero-junctions of various chiralities and diameters
as well as more complex "T-junctions" and
"Y-junctions". The latter junctions do not always obey
the usual pentagon-heptagon pair rule that characterizes the
former junctions. The study of local densities of states (LDOS)
reveal many interesting features, most prominent among them being
the defect-induced states in the gap. The 3-point junctions are
one of the smallest possible tunnel junctions made up entirely of
carbon atoms, their use in a net-work of molecular electronics
components will be discussed in this paper.
*Corresponding Address:
Deepak Srivastava, NASA Ames Research Center, M/S T27A-1; Moffett
Field, CA 94035-1000; telephone: (415) 604-3963; fax: (415)
966-8669; e-mail: [email protected]
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