Abstract
Thermal annealing of graphitic conical nanofibers, produced by pyrolysing Pd precursors under an Ar atmosphere at 850-1000 °C, results in the coalescence of adjacent cones. These novel cone-like arrangements exhibit heptagonal and pentagonal carbon rings located in the cauterized rims between adjacent cones. We propose molecular models that resemble such structures and calculate their electronic properties using a self-consistent local approach based on a realistic tight-binding Hamiltonian. The calculations demonstrate that coalesced cones exhibit a conducting behaviour and a local analysis of the density of states (DOS) reveals that curvature is crucial in modifying the electronic structure.
Original language | English (US) |
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Pages (from-to) | 327-332 |
Number of pages | 6 |
Journal | Chemical Physics Letters |
Volume | 407 |
Issue number | 4-6 |
DOIs | |
State | Published - May 27 2005 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry