Flexible Strain Sensors with Ultra-High Sensitivity and Wide Range Enabled by Crack-Modulated Electrical Pathways

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2024-11-18 DOI:10.1007/s40820-024-01571-6

Yunzhao Bai, Yunlei Zhou, Xuanyu Wu, Mengfei Yin, Liting Yin, Shiyuan Qu, Fan Zhang, Kan Li, YongAn Huang

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Abstract

Highlights

A method is proposed for the modulation of electrical pathways in the cracks of stretchable electrodes using liquid metals, based on which ultra-high sensitivity (> 10⁸) and large-range (> 100%) strain sensors are realised.
A secondary modulation of the response (or performance) of the sensor is proposed, allowing not only electrical modulation by liquid metal patterning during fabrication, but also mechanical modulation by pre-stretching at the time of use.
The air permeability and stability of the patterned liquid metal electrode region is optimised to enable air permeability similar to that of conventional fabrics and cycle durability in excess of 2000 cycles.

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通过裂纹调制电通路实现超高灵敏度和宽范围的柔性应变传感器

本研究在柔性应变传感器技术方面取得了突破性进展，开发出一种超高灵敏度和宽量程传感器，解决了灵敏度与测量范围之间的协调这一关键难题。受竹简结构的启发，我们引入了一种新方法，利用液态金属来调节裂纹铂织物电极内的电通路。这种传感器的测量系数大于 108，应变测量能力超过 100%。图案化液态金属的整合实现了传感器响应的定制化调整，而多孔织物结构则确保了佩戴者的舒适性和透气性。我们的设计不仅优化了传感器的性能，还增强了实际应用中必不可少的电气稳定性。通过系统研究，我们揭示了传感器响应的内在机制，为可穿戴应变传感器的设计提供了宝贵的启示。该传感器在从微应变到大应变检测的各种应用中都表现出卓越的性能，突出了其在现实世界中广泛应用的潜力，展示了柔性电子学领域的重大进展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.