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.

中文翻译：

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室温下垂直氧化锌纳米棒-金结二极管的氨气传感器响应

为了保护我们的生命和财产，传统的金属氧化物半导体（MOS）气体传感器已经进行了数十年的研究。但是，传统设备几乎无法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只能驱动低功耗设备的电池供电便携式系统中的应用。随着氨在氢的生产和存储中的重要性日益提高，对节能氨检测器的需求日益增长。因此，在这项工作中，设计了一种由氧化锌纳米棒与金接触产生的肖特基二极管，可在室温下以625μW的功耗检测气态氨。肖特基二极管气体传感器受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。这种二极管结构无需昂贵的叉指电极即可制造，并且在室温下表现出出色的性能，它为向移动设备配备MOS气体传感器提供了一种新颖的方法。