Synthesis and electronic properties of coalesced graphitic nanocones

M. Muñoz-Navia, J. Dorantes-Dávila, M. Terrones, T. Hayashi, Y. A. Kim, M. Endo, M. S. Dresselhaus, H. Terrones

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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 languageEnglish (US)
Pages (from-to)327-332
Number of pages6
JournalChemical Physics Letters
Volume407
Issue number4-6
DOIs
StatePublished - May 27 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Muñoz-Navia, M., Dorantes-Dávila, J., Terrones, M., Hayashi, T., Kim, Y. A., Endo, M., Dresselhaus, M. S., & Terrones, H. (2005). Synthesis and electronic properties of coalesced graphitic nanocones. Chemical Physics Letters, 407(4-6), 327-332. https://doi.org/10.1016/j.cplett.2005.03.095