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Zinc oxide nanorod sensor
A zinc oxide nanorod sensor or ZnO nanorod sensor is an electronic or optical device detecting presence of certain gas or liquid molecules (e.g. humidity, NO, hydrogen,〔Pearton, S. J. et al. (2005) (Highly stable and reliable lightweight hydrogen sensors for fuel cells ). Florida Solar Energy Center〕〔Lin, J. et al. (2015) (GaN-based and ZnO nanorod sensors for wireless hydrogen leak detection ). International symposium on processes at the compound-semiconductor/solution interface, Quebec PQ , Canada〕 etc.) in the ambient atmosphere. The sensor exploits enhanced surface area (and thus surface activity) intrinsic to all nano-sized materials, including ZnO nanorods. Adsorption of molecules on the nanorods can be detected through variation of the nanorods' properties, such as photoluminescence, electrical conductivity, vibration frequency, mass, etc. The simplest and thus most popular way is to pass electrical current through the nanorods and observe its changes upon gas exposure.
==See also==
*Hydrogen safety
*List of sensors
*Nanoelectromechanical systems
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