Table of Contents
Sensors, Volume 18, Issue 3 (March 2018)
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Cover Story (view full-size image) My research group is interested in the use of thin film and nanostructured materials to optimise [...] Read more. My research group is interested in the use of thin film and nanostructured materials to optimise sensitivity and selectivity of gas sensor devices. In this paper, we investigated the use of ultra-thin (<100 nm) films of TiO2, deposited using atomic layer deposition, and explored their gas sensing properties. Contra to our expectation, we found that the thinnest films did not give the greatest sensitivity, which was attributed to the screening effect caused by full depletion of the sensing layer. However, we found the particular device structure allowed for discrimination between NH3 and CH4, due to different sensing modalities on the device. View the paper