Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 37, Pages 11261-11268Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11867c
Keywords
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Funding
- University of Cologne, Germany
- Russian Ministry of Education and Science [11.519.11.1009]
- European Commission [247768]
- ICREA Funding Source: Custom
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Highly crystalline SnO2 nanowires were synthesized and functionalized with copper particles in a CVD using Sn(OBut)(4) and [Cu-II((C5H4N)(CHCOCF3))(2)](2) (1) as precursors respectively. Controlled oxidation of Cu to CuO led to the formation of CuO@SnO2 p-n heterojunctions, which were found to be highly sensitive and selective towards the detection of H2S gas. The change in the conductance upon exposure to H2S gas was attributed to the formation of CuS resulting in the shrinkage of the space charge region along the SnO2 nanowire and a concomitant increase of the conductivity channel in an individual nanowire.
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