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Effect of humidity on individual SnO2 coated carbon nanotubes studied by in situ STXM

  • Jian Wang*
  • , Jigang Zhou
  • , Haitao Fang
  • , Tsun Kong Sham
  • , Chithra Karunakaran
  • , Yingshen Lu
  • , Glyn Cooper
  • , Adam P. Hitchcock
  • *Corresponding author for this work
  • University of Saskatchewan
  • Harbin Institute of Technology
  • Western University
  • McMaster University

Research output: Contribution to journalArticlepeer-review

Abstract

In situ Scanning Transmission X-ray Microscopy (STXM) with humidity control at the 10ID-1 spectromicroscopy beamline at the Canadian Light Source was used to study the effect of humidity on individual SnO2 coated carbon nanotubes (SnO2/CNT). O 1s STXM image stacks of individual SnO 2 coated CNT were measured at controlled relative humidity (RH). At high RH = 0.78, 10-50 nm of condensed water was found adsorbed on individual SnO2/CNT as determined by spectral curve fitting to O 1s image sequences. Coating variations among individual SnO2/CNT were found. This is consistent with O 1s NEXAFS spectra extracted from the same individual SnO2/CNT. For some entangled SnO2/CNT regions, as much as 200 nm condensed liquid water was detected, indicating strong interaction between SnO2 and water.

Original languageEnglish
Pages (from-to)296-300
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume184
Issue number3-6
DOIs
StatePublished - Apr 2011
Externally publishedYes

Keywords

  • In situ STXM
  • NEXAFS
  • Relative humidity (RH)
  • SnO/CNT
  • Stack Fit

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