Hierarchical assembly of ZnO nanostructures on SnO2backbone nanowires: Low-temperature hydrothermal preparation and optical properties

Chuanwei Cheng, Bo Liu, Huiying Yang, Weiwei Zhou, Li Sun, Rui Chen, Siu Fung Yu, Jixuan Zhang, Hao Gong, Handong Sun, Hong Jin Fan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

245 Citations (Scopus)

Abstract

Hierarchical nanostructures with SnO2backbones and ZnO branches are successfully prepared in a large scale by combining the vapor transport and deposition process (for SnO2nanowires) and a hydrothermal growth (for ZnO). The ZnO nanorods grow epitaxially on the SnO2nanowire side faces mainly with a four-fold symmetry. The number density and morphology of the secondary ZnO can be tailored by changing the precursor concentration, reaction time, and by adding surfactants. Photoluminescence (PL) properties are studied as a function of temperature and pumping power. Such hybrid SnO2-ZnO nanostructures show an enhanced nearband gap emission compared with the primary SnO2nanowires. Under the optical excitation, a UV random lasing is observed which originates from the hierarchically assembled ZnO branches. These three-dimensional nanostructures may have application potentials as chemical sensors, battery electrodes, and optoelectronic devices.
Original languageEnglish
Pages (from-to)3069-3076
Number of pages8
JournalACS Nano
Volume3
Issue number10
DOIs
Publication statusPublished - 27 Oct 2009
Externally publishedYes

Keywords

  • Branch hierarchical
  • Hydrothermal
  • Lasing
  • Nanowire
  • SnO 2
  • ZnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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