Ab initio theoretical study of non-covalent adsorption of aromatic molecules on boron nitride nanotubes

Yu Zhao, Xiaojun Wu, Jinlong Yang, Xiao Cheng Zeng

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

We have studied non-covalent functionalization of boron nitride nanotubes (BNNTs) with benzene molecule and with seven other different heterocyclic aromatic rings (furan, thiophene, pyrrole, pyridine, pyrazine, pyrimidine, and pyridazine, respectively). A hybrid density functional theory (DFT) method with the inclusion of dispersion correction is employed. The structural and electronic properties of the functionalized BNNTs are obtained. The DFT calculation shows that upon adsorption to the BNNT, the center of aromatic rings tend to locate on top of the nitrogen site. The trend of adsorption energy for the aromatic rings on the BNNTs shows marked dependence on different intermolecular interactions, including the dispersion interaction (area of the delocalized φ bond), the dipoledipole interaction (polarization), and the electrostatic repulsion (lone pair electrons). The DFT calculation also shows that non-covalent functionalization of BNNTs with aromatic rings can give rise to new impurity states within the band gap of pristine BNNTs, suggesting possible carrier doping of BNNTs via selective adsorption of aromatic rings.

Original languageEnglish (US)
Pages (from-to)11766-11772
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number24
DOIs
StatePublished - Jun 28 2011

ASJC Scopus subject areas

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

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