Beilstein J. Nanotechnol.2015,6, 480–491, doi:10.3762/bjnano.6.49
electronic structure from alternating to equalized bonds.
Keywords: carbon nanostructures; cumulenes; polyynes; Raman spectroscopy; sp-hybridizedcarbonsystems; Review
Introduction
Over the last decades carbon nanostructures have been widely investigated for their unique properties and for their potential
-hybridizedcarbonsystems are still considered elusive and unstable materials, a number of nanostructures consisting of sp-carbon wires have been produced and characterized to date. In this short review, we present the main CAW synthesis techniques and stabilization strategies and we discuss the current
single–triple bonds (polyynes), expected to show semiconducting properties. The electronic and optical properties of CAWs can be finely tuned by controlling the wire length (i.e., the number of carbon atoms) and the type of termination (e.g., atom, molecular group or nanostructure). Although linear, sp
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Figure 1:
Schematic structures of infinite, linear, sp-carbon wires: (a) equalized wire with all double bonds...