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 language | English |
|---|---|
| Pages (from-to) | 296-300 |
| Number of pages | 5 |
| Journal | Journal of Electron Spectroscopy and Related Phenomena |
| Volume | 184 |
| Issue number | 3-6 |
| DOIs | |
| State | Published - Apr 2011 |
| Externally published | Yes |
Keywords
- In situ STXM
- NEXAFS
- Relative humidity (RH)
- SnO/CNT
- Stack Fit
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