Beilstein J. Nanotechnol.2015,6, 480–491, doi:10.3762/bjnano.6.49
, atomic-scale wires comprised of sp-hybridized carbon atoms represent ideal 1D systems to potentially downscale devices to the atomic level. Carbon-atom wires (CAWs) can be arranged in two possible structures: a sequence of double bonds (cumulenes), resulting in a 1D metal, or an alternating sequence of
electronic structure from alternating to equalized bonds.
Keywords: carbon nanostructures; cumulenes; polyynes; Raman spectroscopy; sp-hybridized carbon systems; Review
Introduction
Over the last decades carbon nanostructures have been widely investigated for their unique properties and for their potential
issues since the 1D atomic equalized structures tend to change into the alternating triple–single bond structures to reach a minimum energy configuration (i.e., due to the onset of a Peierls distortion). Such structural change has a direct effect on the electronic properties.
Infinite cumulenes have one
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Figure 1:
Schematic structures of infinite, linear, sp-carbon wires: (a) equalized wire with all double bonds...