Optical gas sensing by micro‐photoluminescence on multiple and single ZnO nanowires. Issue 8 (18th March 2015) - Madel, Manfred
Abstract ZnO nanowires with average diameters of 50–200 nm were grown by chemical vapor deposition. Their gas sensing properties were analyzed by micro‐photoluminescence spectroscopy allowing for optical readout. The influence of O2 atmosphere on the emission intensity was investigated for ZnO nanowires with different metal cover layers and after O2 plasma pre‐treatment. Investigations of single ZnO nanowires showed an improved sensitivity towards O2. Photoresponse of a single ZnO nanowire (inset) to O2 ambient.