Sensitivity Improvement of Urchin-Like ZnO Nanostructures Using Two-Dimensional Electron Gas in MgZnO/ZnO.

This paper introduces a strategy for improving the sensitivity of a gas sensor to NO gas. The gas sensor was fabricated using urchin-like ZnO nanostructures grown on MgO particles via vapor-phase growth and decorated with MgZnO nanoparticles via a sol-gel process. The urchin-like ZnO gas sensor decorated with MgZnO showed higher sensitivity to NO gas than a pristine urchin-like ZnO gas sensor.

Improved Sensitivity of α-FeO Nanoparticle-Decorated ZnO Nanowire Gas Sensor for CO.

A strategy for improving the sensitivity of a sensor for detecting CO and NH gases is presented herein. The gas sensor was fabricated from ZnO metal oxide semiconductor nanostructures grown via a vapor⁻liquid⁻solid process and decorated with α-FeO nanoparticles via a sol⁻gel process. The response was enhanced by the formation of an α-FeO/ZnO n⁻n heterojunction and the growth of thinner wires.