New Systems Comprised of Non-Metallic Elements
The motivation for producing new conductors is in part a desire to achieve unusual, or even unprecedented, materials properties of technological importance. Metallic conductors are based on open-shell atoms, while nonmetallic compounds typically exhibit covalent or polar bonding based on closed shells. Since open-shell electronic bands are a prerequisite for any conductor, molecular or polymeric conductors will almost certainly be unusual chemically. The stabilization of interacting open-shell non-metals in a solid, so as to prevent the exclusive formation of polar, covalent bonds, is an enormously challenging task. On the other hand, recent developments with doped polythiazyl, (SN), and polyacetylene, (CH), suggest that the judicious incorporation of electron donating and withdrawing groups may yet provide a fairly general scheme for achieving incompletely filled bands, as required for conductors.
KeywordsBoron Nitride Epoxy Composite Band Structure Calculation Graphite Fiber Graphite Intercalation Compound
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