Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 11, Issue 33, Pages 7105-7110Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b905234h
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Funding
- Spanish Government [MAT2007-66741-C02-01]
- UE [NAN2006-28568-E]
- Human Potential Program
- University of Cologne
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Single-crystalline semiconductor metal oxide nanowires exhibit novel structural and electrical properties attributed to their reduced dimensions, well-defined geometry and the negligible presence of grain boundaries and dislocations in their inside. This favours direct chemical transduction mechanisms at their surfaces upon exposure to gas molecules, making them promising active device elements for a new generation of chemical sensors. Furthermore, metal oxide nanowires can be heated up to the optimal operating temperature for gas sensing applications with extremely low power consumption due to their small mass, giving rise to devices more efficient than their nanoparticle-based counterparts. Here, the current status of development of sensors based on individual metal oxide nanowires is surveyed, and the main technological challenges which act as bottleneck to their potential use in real applications are presented.
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