Synthesis, growth mechanism, and light-emission properties of twisted SiO2 nanobelts and nanosprings

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
View graph of relations

Author(s)

  • Z. Y. Zhang
  • X. L. Wu
  • L. L. Xu
  • J. C. Shen
  • G. G. Siu

Detail(s)

Original languageEnglish
Article number164702
Journal / PublicationJournal of Chemical Physics
Volume129
Issue number16
Publication statusPublished - 2008

Abstract

Amorphous twisted Si O2 nanobelts have been synthesized on Si wafers using facile thermal evaporation. These nanobelts are produced together with Si O2 nanowires and a small quantity of Si O2 nanosprings. Spectral and microstructural analyses suggest that the twisted Si O2 nanobelts and nanosprings form via a polar surface driven process. Spontaneous polarization on the very thin polar crystalline Si O2 layers on the amorphous Si O2 nanobelt and nanospring surfaces makes the nuclei rearrange orderly and causes the nanobelt and nanowire to roll up at a certain twisty angle. The cathodoluminescence spectrum acquired from these Si O2 nanostructures reveals three emission bands at 4.4, 3.7, and 2.7 eV originating from oxygen-related defect centers. The polar surface driven mechanism can adequately explain the growth of these novel twisty nanobelts and nanosprings which have potential applications in sensors, transducers, resonators, and photonics. © 2008 American Institute of Physics.

Citation Format(s)

Synthesis, growth mechanism, and light-emission properties of twisted SiO2 nanobelts and nanosprings. / Zhang, Z. Y.; Wu, X. L.; Xu, L. L. et al.
In: Journal of Chemical Physics, Vol. 129, No. 16, 164702, 2008.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review