Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature.
Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature.
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DOI：
10.1021/acssensors.0c01769
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发表时间：
2020-10
期刊：
影响因子：
8.9
通讯作者：
Ying Tu;Candice Kyle;Hui Luo;De-Wen Zhang;Anirban Das;J. Briscoe;S. Dunn;M. Titirici;S. Krause
中科院分区：
文献类型：
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作者：
Ying Tu;Candice Kyle;Hui Luo;De-Wen Zhang;Anirban Das;J. Briscoe;S. Dunn;M. Titirici;S. Krause
传统的金属氧化物半导体（MOS）气体传感器已经研究了几十年，以保护我们的生命和财产。然而，传统的设备很难满足我们快速发展的移动社会的要求，因为高工作温度极大地限制了它们在电池负载的便携式系统中的应用，这些系统只能驱动低功耗的设备。随着氨在氢气的生产和储存中越来越重要，对节能氨探测器的需求越来越大。因此，在这项工作中，设计了一个由氧化锌纳米棒与金接触产生的肖特基二极管，用于在室温下检测气态氨，功耗为625 μW。肖特基二极管气体传感器得益于不同气体中势垒高度的变化以及金纳米颗粒的催化作用。该二极管结构无需昂贵的交叉电极，在室温下具有优异的性能，为移动设备配备MOS气体传感器提供了一种新方法。
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.