Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature

Journal article


Tu, Y., Kyle, C., Luo, H., Zhang, D-W., Das, A., Briscoe, J., Dunn, S., Titirici, M-M. and Krause, S. (2020). Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature. ACS Sensors. https://doi.org/10.1021/acssensors.0c01769
AuthorsTu, Y., Kyle, C., Luo, H., Zhang, D-W., Das, A., Briscoe, J., Dunn, S., Titirici, M-M. and Krause, S.
Abstract

Conventional metal oxide semiconductor (MOS) gas sensors have been investigated for decades to protect our life and property. However, the traditional devices can hardly fulfill the requirements of our fast developing mobile society, because the high operating temperatures greatly limit their applications in battery-loaded portable systems that can only drive devices with low power consumption. As ammonia is gaining importance in the production and storage of hydrogen, there is an increasing demand for energy-efficient ammonia detectors. Hence, in this work, a Schottky diode resulting from the contact between zinc oxide nanorods and gold is designed to detect gaseous ammonia at room temperature with a power consumption of 625 μW. The Schottky diode gas sensors benefit from the change of barrier height in different gases as well as the catalytic effect of gold nanoparticles. This diode structure, fabricated without expensive interdigitated electrodes and displaying excellent performance at room temperature, provides a novel method to equip mobile devices with MOS gas sensors.

Year2020
JournalACS Sensors
PublisherAmerican Chemical Society (ACS)
ISSN2379-3694
Digital Object Identifier (DOI)https://doi.org/10.1021/acssensors.0c01769
Publication dates
Online28 Oct 2020
Publication process dates
Accepted13 Oct 2020
Deposited03 Nov 2020
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