Digitally-defined ultrathin transparent wireless sensor network for room-scale imperceptible ambient intelligence

IF 12.3 1区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC npj Flexible Electronics Pub Date : 2024-02-06 DOI:10.1038/s41528-024-00293-4
Yunxia Jin, Mengxia Yu, Dat T. Nguyen, Xin Yang, Zhipeng Li, Ze Xiong, Chenhui Li, Yuxin Liu, Yong Lin Kong, John S. Ho
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Abstract

Wireless and battery-free radio-frequency (RF) sensors can be used to create physical spaces that ambiently sense and respond to human activities. Making such sensors ultra-flexible and transparent is important to preserve the aesthetics of living environments, accommodate daily activities, and functionally integrate with objects. However, existing RF sensors are unable to simultaneously achieve high transparency, flexibility, and the electrical conductivity required for remote room-scale operation. Here, we report 4.5 µm RF tag sensors achieving transparency exceeding 90% that provide capabilities in room-scale ambient wireless sensing. We develop a laser-assisted water-based adhesion-reversion process to digitally realize computer-aided RF design at scale. By individually tagging multiple objects and regions of the human body, we demonstrate multiplexed wireless tracking of human-environment interactions and physiological signals at a range of up to 8 m. These radio-frequency identification sensors open opportunities for non-intrusive wireless sensing of daily living spaces for applications in health monitoring and elderly care.

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数字定义的超薄透明无线传感器网络,实现房间规模的不可感知环境智能
无线和免电池射频(RF)传感器可用于创建能感知和响应人类活动的物理空间。要保持生活环境的美感、适应日常活动并在功能上与物体集成,就必须使这种传感器具有超强的灵活性和透明度。然而,现有的射频传感器无法同时实现高透明度、灵活性和远程房间级操作所需的导电性。在此,我们报告了透明度超过 90% 的 4.5 µm 射频标签传感器,为房间级环境无线传感提供了能力。我们开发了一种激光辅助水基附着力还原工艺,以数字方式实现计算机辅助射频设计的规模化。通过对人体的多个物体和区域进行单独标记,我们展示了在最远 8 米的范围内对人与环境的互动和生理信号进行多路复用无线跟踪。这些射频识别传感器为日常生活空间的非侵入式无线传感提供了机会,可应用于健康监测和老年人护理。
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来源期刊
CiteScore
17.10
自引率
4.80%
发文量
91
审稿时长
6 weeks
期刊介绍: npj Flexible Electronics is an online-only and open access journal, which publishes high-quality papers related to flexible electronic systems, including plastic electronics and emerging materials, new device design and fabrication technologies, and applications.
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