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首页> 外文期刊>Advanced Functional Materials >Perfectly Aligned, Air-Suspended Nanowire Array Heater and Its Application in an Always-On Gas Sensor
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Perfectly Aligned, Air-Suspended Nanowire Array Heater and Its Application in an Always-On Gas Sensor

机译：完美对齐，空气悬挂的纳米线阵列加热器及其在始终如一的气体传感器中的应用

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摘要

In spite of the excellent thermal properties of nanowires, the typical form factor of unrefined nanowires has restricted their potential use in developing ultralow power electrothermal heater and application device. In this paper, a nanowire array with a perfectly aligned geometric structure on an air-suspended beam is proposed as a novel heating element. By locally confining the generated heat and suppressing beam conduction loss to the substrate, the proposed nanowire array heater overcomes the fundamental power consumption limits of conventional film-type microheaters. As a result, only 2.51 mW of power is required to reach an average temperature of 300 degrees C, surpassing the performance of state-of-the-art microheaters. The developed nanowire array heater is monolithically integrated with gas sensing nanowires to demonstrate its full capability as an ultralow power gas sensor. The fabricated device successfully detects low concentration carbon monoxide gas of 1 ppm, using less than 5 mW of power. The presented technique offers a promising pathway toward realizing always-on gas sensors driven by battery-powered mobile devices, which will ensure a hazardous gas-free safe environment. In addition, the proposed strategy of employing geometrically structured nanomaterials in the electrothermal heater design enables to lead out their potential thermal capability in many other applications.
机译：尽管纳米线的优异热性能，但未精制纳米线的典型形状因子限制了它们在开发超级电力电热加热器和应用装置方面的潜在用途。在本文中，提出了一种纳米线阵列在空气悬挂光束上具有完美对准的几何结构，作为新颖的加热元件。通过将产生的热量和抑制光束传导损耗局部限制到基板，所提出的纳米线阵列加热器克服了传统膜型微热器的基本功耗限制。结果，需要2.51兆瓦的电力需要达到300摄氏度的平均温度，超越了最先进的微热的性能。开发的纳米线阵列加热器与气体传感纳米线整体集成，以证明其作为超级功率气体传感器的完全能力。制造的装置成功地使用小于5兆瓦的功率检测1ppm的低浓度一氧化碳气体。本技术提供了有希望的途径，实现由电池供电的移动设备驱动的始终开启气体传感器，这将确保无危险的无气体安全环境。此外，在电热加热器设计中使用几何结构纳米材料的所提出的策略使得能够在许多其他应用中引出它们的潜在热能。

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