Experimental and Theoretical studies suggesting the possibility of metallic boron nitride edges in porous nanourchins

M. Terrones, J. C. Charlier, A. Gloter, E. Cruz-Silva, E. Terrés, Y. B. Li, A. Vinu, Z. Zanolli, J. M. Dominguez, H. Terrones, Y. Bando, D. Golberg

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Abstract

We first describe the synthesis of novel and highly porous boron nitride (BN) nanospheres (100-400 nm o.d.) that exhibit a rough surface consisting of open BN nanocones and corrugated BN ribbons-The material was produced by reacting B2O3 with nanoporous carbon spheres under nitrogen at ca. 1750 °C. The BN nanospheres were characterized using scanning electron microscopy, high-resolution electron microscopy, and electron energy loss spectroscopy. The porous BN spheres show relatively large surface areas of ca. 290 m2/g and exhibit surprisingly stable field emission properties at low turn-on voltages (e.g., 1-1.3 Vlμm). We attribute these outstanding electron emission properties to the presence of finite BN ribbons located at the surface of the nanospheres (exhibiting zigzag edges), which behave like metals as confirmed by first-principles calculations. In addition, our ab initio theoretical results indicate that the work function associated to these zigzag BN ribbons is 1.3 eV lower when compared with BN-bulk material.

Original languageEnglish (US)
Pages (from-to)1026-1032
Number of pages7
JournalNano letters
Volume8
Issue number4
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Terrones, M., Charlier, J. C., Gloter, A., Cruz-Silva, E., Terrés, E., Li, Y. B., Vinu, A., Zanolli, Z., Dominguez, J. M., Terrones, H., Bando, Y., & Golberg, D. (2008). Experimental and Theoretical studies suggesting the possibility of metallic boron nitride edges in porous nanourchins. Nano letters, 8(4), 1026-1032. https://doi.org/10.1021/nl072713m