Non-Secondary Activating Flexible Liquid Metal Sensors with Excellent Waterproof Capability for Detection of Human Signals

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-02-27 DOI:10.1021/acs.langmuir.4c04138

ChunLi Luo, Wei Zhao, JianYu Yan, Xuan Wu, WeiGuo Yan

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Abstract

In recent years, flexible sensors have gained increasing attention due to their excellent flexibility. Liquid metal (LM) has gradually become an ideal material for fabricating flexible sensors, thanks to its outstanding electrical conductivity and low-temperature fluidity. However, oxidation and the need for secondary activation of LM present significant technical challenges in the development of flexible LM sensors. In this paper, we introduce a simple method that integrates the flexibility of polydimethylsiloxane (PDMS) to fabricate flexible LM sensors with a sandwich structure. The sandwich-structured sensor demonstrates superior conductivity and effectively prevents LM oxidation and the need for secondary mechanical activation. Additionally, the PDMS-LM sensor exhibits excellent performance under various conditions, with a fast response time to mechanical stimuli (0.5 s), as well as outstanding durability and stability (>10,000 s of cycling). These remarkable properties give the sandwich PDMS-LM sensor great potential for the field of human motion monitoring, bringing further development and direction for intelligent sensing technology.

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具有优异防水性能的非二次激活柔性液态金属传感器，用于检测人体信号

近年来，柔性传感器因其优异的柔性性能而受到越来越多的关注。液态金属（LM）由于其优异的导电性和低温流动性，逐渐成为制造柔性传感器的理想材料。然而，在柔性LM传感器的开发中，氧化和对LM的二次活化的需求是一个重大的技术挑战。本文介绍了一种利用聚二甲基硅氧烷（PDMS）的柔韧性来制作具有夹层结构的柔性LM传感器的方法。三明治结构的传感器具有优异的导电性，可有效防止LM氧化，无需二次机械活化。此外，PDMS-LM传感器在各种条件下都表现出优异的性能，对机械刺激的响应时间快（0.5 s），以及出色的耐用性和稳定性（循环周期为10,000 s）。这些显著的性能使得夹层PDMS-LM传感器在人体运动监测领域具有巨大的潜力，为智能传感技术带来了进一步的发展和方向。

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

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).