Individual Bi2O3-Functionalized ZnO Microwire for Hydrogen Gas Detection
Individual micro- and nanostructures of metal oxides are known to be highly sensitive to surface phenomena due to their enhanced surface-to-volume ratio. In this work, an individual Bi2O3-functionalized ZnO microwire (Bi2O3/ZnO MW) with a diameter of ~2.2 μm was integrated into a sensing device using its direct transfer and placement in a focused ion beam (FIB)/scanning electron microscopy (SEM) equipment. The fabricated device was exposed to H2 gas at room temperature showing a detectable response. The gas response to 1000 ppm is ~28%.
KeywordsHybrid nanocomposite ZnO Hydrogen gas sensor Bi2O3
This research was sponsored partially by the German Research Foundation (DFG) under the schemes PAK 902 (AD 183/12-2) and by the STCU within the Grant 6229.