Nanowires assembled SnO2 nanopolyhedrons with enhanced gas sensing properties

Di Chen, Jing Xu, Zhong Xie, Guozhen Shen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

129 Citations (Scopus)

Abstract

Self-assembly of one-dimensional nanoscale building blocks into functional 2-D or 3-D complex superstructures has stimulated a great deal of interest. We report the synthesis and characterization of nanopolyhedrons assembled from ultrathin SnO2 nanowires based on the sodium dodecyl sulfate (SDS)-assisted hydrothermal process. As-synthesized SnO2 nanopolyhedrons have uniform diameters around 300 nm and are self-assembled by numerous ultrathin SnO2 nanowires with diameters of 5-10 nm. The growth mechanism was also studied by investigating the samples synthesized at different reaction time. Thin films of the assembled SnO2 nanopolyhedrons were configured as high performance sensors to detect methanol, ethanol, and acetone, which exhibited 1 ppm sensitivity, very fast response and recovery times (several seconds for different gases with concentrations of 1-200 ppm) to all the target gases and highly selective detection to acetone.

Original languageEnglish
Pages (from-to)2112-2117
Number of pages6
JournalACS applied materials & interfaces
Volume3
Issue number6
DOIs
Publication statusPublished - 22 Jun 2011
Externally publishedYes

Keywords

  • Assembly
  • Chemical sensor
  • Hydrothermal
  • Nanopolyhedron
  • Nanowires
  • SnO

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