具有两相微流体流和二维材料热隔离层的零功率红外开关。

IF 7.3 1区 工程技术 Q1 INSTRUMENTS & INSTRUMENTATION
Zekun Zhang, Peng Li, Yixuan Zou
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引用次数: 0

摘要

无线传感器节点(WSN)在环境监测等许多领域发挥着重要作用。然而,无人值守的 WSN 面临着即使在没有有用信息的情况下也要持续耗电的挑战,这使得能源供应成为 WSN 的瓶颈。在这里,我们实现了零功耗红外开关,它由元表面和两相微流体流组成。元表面可以识别来自目标的红外信号并将其转化为热量,从而触发两相微流控开关。当目标不存在时,开关就会关闭。石墨烯/MoS2/石墨烯二维材料异质结构(厚
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Zero-power infrared switch with two-phase microfluidic flow and a 2D material thermal isolation layer.

Zero-power infrared switch with two-phase microfluidic flow and a 2D material thermal isolation layer.

Wireless sensor nodes (WSNs) play an important role in many fields, including environmental monitoring. However, unattended WSNs face challenges in consuming power continuously even in the absence of useful information, which makes energy supply the bottleneck of WSNs. Here, we realized zero-power infrared switches, which consist of a metasurface and two-phase microfluidic flow. The metasurface can recognize the infrared signal from the target and convert it into heat, which triggers the two-phase microfluidic flow switch. As the target is not present, the switch is turned off. The graphene/MoS2/graphene 2D material heterostructure (thickness <2 nm) demonstrates an exceptionally high thermal resistance of 4.2 K/W due to strong phonon scattering and reduces the heat flow from the metasurface to the supporting substrate, significantly increasing the device sensitivity (the displacement of the two-phase microfluidic flow increases from ~1500 to ~3000 µm). The infrared switch with a pair of symmetric two-phase microfluidic flows can avoid spurious triggering resulting from environmental temperature changes. We realized WSNs with near-zero standby power consumption by integrating the infrared switch, sensors, and wireless communication module. When the target infrared signal appears, the WSNs are woken and show superb visual/auditory sensing performance. This work provides a novel approach for greatly lengthening the lifespan of unattended WSNs.

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来源期刊
Microsystems & Nanoengineering
Microsystems & Nanoengineering Materials Science-Materials Science (miscellaneous)
CiteScore
12.00
自引率
3.80%
发文量
123
审稿时长
20 weeks
期刊介绍: Microsystems & Nanoengineering is a comprehensive online journal that focuses on the field of Micro and Nano Electro Mechanical Systems (MEMS and NEMS). It provides a platform for researchers to share their original research findings and review articles in this area. The journal covers a wide range of topics, from fundamental research to practical applications. Published by Springer Nature, in collaboration with the Aerospace Information Research Institute, Chinese Academy of Sciences, and with the support of the State Key Laboratory of Transducer Technology, it is an esteemed publication in the field. As an open access journal, it offers free access to its content, allowing readers from around the world to benefit from the latest developments in MEMS and NEMS.
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