Nacre-inspired MXene-based film for highly sensitive piezoresistive sensing over a broad sensing range

IF 8.1 1区 医学 Q1 ENGINEERING, BIOMEDICAL Bio-Design and Manufacturing Pub Date : 2024-07-02 DOI:10.1007/s42242-024-00292-4
Gaofeng Wang, Lingxian Meng, Xinyi Ji, Xuying Liu, Jiajie Liang, Shuiren Liu
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Abstract

As the main component of wearable electronic equipment, flexible pressure sensors have attracted wide attention due to their excellent sensitivity and their promise with respect to applications in health monitoring, electronic skin, and human–computer interactions. However, it remains a significant challenge to achieve epidermal sensing over a wide sensing range, with short response/recovery time and featuring seamless conformability to the skin simultaneously. This is critical since the capture of minute electrophysiological signals is important for health care applications. In this paper, we report the preparation of a nacre-like MXene/sodium carboxymethyl cellulose (CMC) nanocomposite film with a “brick-and-mortar” interior structure using a vacuum-induced self-assembly strategy. The synergistic behavior of the MXene “brick” and flexible CMC “mortar” contributes to attenuating interlamellar self-stacking and creates numerous variable conductive pathways on the sensing film. This resulted in a high sensitivity over a broad pressure range (i.e., 0.03–22.37 kPa: 162.13 kPa−1; 22.37–135.71 kPa: 127.88 kPa−1; 135.71–286.49 kPa: 100.58 kPa−1). This sensor also has a low detection limit (0.85 Pa), short response/recovery time (8.58 ms/34.34 ms), and good stability (2000 cycles). Furthermore, we deployed pressure sensors to distinguish among tiny particles, various physiological signals of the human body, space arrays, robot motion monitoring, and other related applications to demonstrate their feasibility for a variety of health and motion monitoring use cases.

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在宽传感范围内实现高灵敏度压阻传感的珍珠层启发型 MXene 基薄膜
作为可穿戴电子设备的主要组成部分,柔性压力传感器因其出色的灵敏度以及在健康监测、电子皮肤和人机交互方面的应用前景而受到广泛关注。然而,如何在较宽的传感范围内实现表皮传感、缩短响应/恢复时间并同时与皮肤无缝贴合,仍然是一项重大挑战。这一点至关重要,因为捕捉微小的电生理信号对于医疗保健应用非常重要。在本文中,我们报告了利用真空诱导自组装策略制备的具有 "砖墙 "内部结构的珍珠状 MXene/羧甲基纤维素钠(CMC)纳米复合薄膜。MXene "砖 "和柔性 CMC "砂浆 "的协同作用有助于减弱层间自堆积,并在传感薄膜上形成了许多可变的导电通路。这使得传感器在很宽的压力范围内具有很高的灵敏度(即 0.03-22.37 kPa:162.13 kPa-1;22.37-135.71 kPa:127.88 kPa-1;135.71-286.49 kPa:100.58 kPa-1)。该传感器还具有检测限低(0.85 Pa)、响应/恢复时间短(8.58 ms/34.34 ms)和稳定性好(2000 次循环)的特点。此外,我们还部署了压力传感器来区分微小颗粒、人体的各种生理信号、空间阵列、机器人运动监测和其他相关应用,以证明其在各种健康和运动监测用例中的可行性。
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来源期刊
Bio-Design and Manufacturing
Bio-Design and Manufacturing Materials Science-Materials Science (miscellaneous)
CiteScore
13.30
自引率
7.60%
发文量
148
期刊介绍: Bio-Design and Manufacturing reports new research, new technology and new applications in the field of biomanufacturing, especially 3D bioprinting. Topics of Bio-Design and Manufacturing cover tissue engineering, regenerative medicine, mechanical devices from the perspectives of materials, biology, medicine and mechanical engineering, with a focus on manufacturing science and technology to fulfil the requirement of bio-design.
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