Electronic structure of fullerenelike cages and finite nanotubes of aluminum nitride

Rajendra R. Zope and Brett I. Dunlap
Phys. Rev. B 72, 045439 – Published 18 July 2005

Abstract

We report a density functional study of alternate fullerenelike cage structures and finite closed, capped single-wall nanotubes of aluminum nitride. The cages and nanotubes studied are modeled as Al24N24, Al28N28, Al32N32, Al36N36, Al48N48, and Al96N96. The structure optimization and calculation of the electronic structure, vertical ionization potential, and the electron affinity are performed at the all-electron level by the analytic Slater-Roothaan method, using a polarized Gaussian basis set of double zeta quality. All structures are energetically stable with binding energy of about 1011eV per AlN pair. For the larger Al96N96, the fullerenelike cage is energetically less favorable than the two-shell cluster that has Al24N24 as an inner shell. The vertical ionization potential and the electronic affinity are in the range 6.76.9eV and 1.52.0eV, respectively. The binding energy shows systematic increase with increase in the length of the (4,4) nanotube. The energy band gap, determined using the ΔSCF method, shows that these structures are characterized by a fairly large band gap of about 45eV, which is, however, smaller than the gap for the corresponding boron nitride structures.

    • Received 19 March 2005

    DOI:https://doi.org/10.1103/PhysRevB.72.045439

    ©2005 American Physical Society

    Authors & Affiliations

    Rajendra R. Zope1,* and Brett I. Dunlap2

    • 1Department of Chemistry, George Washington University, Washington DC, 20052, USA
    • 2Code 6189, Theoretical Chemistry Section, US Naval Research Laboratory, Washington, DC 20375, USA

    • *Present mailing address: Theoretical Chemistry Section, Naval Research Laboratory, Washington DC 20375, USA.

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    Issue

    Vol. 72, Iss. 4 — 15 July 2005

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