Fabrication of laser-induced graphene-based multifunctional sensing platform for sweat ion and human motion monitoring
Fabrication of laser-induced graphene-based multifunctional sensing platform for sweat ion and human motion monitoring
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DOI：
10.1016/j.sna.2021.113320
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发表时间：
2022-02-01
影响因子：
4.6
通讯作者：
Shin, Bo-Sung
中科院分区：
文献类型：
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作者：
Lee, Chan-Woo;Jeong, Sung-Yeob;Shin, Bo-Sung
与血液监测不同，人体汗液监测可以在皮肤上容易地执行，可以提供有价值的个人医疗保健数据，并且适用于疾病和其他状况的诊断。然而，尽管对汗液感测有着巨大的兴趣，但仍需要开发低成本、高效率、多生物特征感测能力的平台，以大规模利用可穿戴生物传感器来广泛监测其他生理信号。在这里，我们提出了一种可穿戴的多功能基于LIG的传感器，配备了基于Arduino的读出电子设备，可以同时监测人体汗液中钠离子和钾离子的浓度以及生命信号（人体运动）产生的应变。根据聚二甲基硅氧烷（PDMS）和木质素的重量，制造我们的弹性体基底。采用激光直写（LDW）技术在聚二甲基硅氧烷（PDMS）/木质素（Lignin）复合材料上制备了激光诱导石墨烯（LIG），激光辐照后PDMS/Lignin复合材料转变为多孔结构，研制了一种可穿戴多功能传感器。用自制的钠、钾离子选择性电极和PDMS/木质素复合材料上的Ag/AgCl电极测量了不同浓度Na+（10（-1）-10（-7））和K+（10（-1）-10（-8））时的电位差，传感器的灵敏度为63.6 mV/dec（Na+，n = 6）和59.2 mV/dec（K+，n = 7）;这些结果几乎完全符合能斯特行为（其预测值分别为R-2 =0.99988和0.99855），并表明循环稳定性（5000次循环，计量因子约为20）。这种多功能且具有成本效益的传感器平台的简单制造表明汗液中钠和钾离子的实时变化以及人体运动产生的应变。(C)2021作者出版社：Elsevier B. V. CC_BY_4.0
Human sweat monitoring, which unlike blood monitoring can be easily performed on the skin, can provide valuable personal healthcare data, as well as being suitable for use in diagnosis of disease and other conditions. However, despite the tremendous interest in sweat sensing, the development of low-cost, high efficiency, multi-biometric sensing-capable platforms is still required for the large-scale utilization of wearable biosensors for extensive monitoring with other physiological signals. Here, we propose a wearable multifunctional LIG-based sensor, complete with Arduino-based readout electronics, which simultaneously monitors concentrations of sodium and potassium ions in human sweat as well as strain generated by vital signals (human motion). Our elastomer substrates were fabricated according to the weight of polydimethylsiloxane (PDMS) and lignin. A wearable multifunctional sensor was developed via the formation of laser-induced graphene (LIG) on PDMS/lignin composite substrates using Laser Direct writing (LDW); PDMS/Lignin transforms into the porous structure after laser irradiation. The fabricated sodium and potassium ion-selective electrodes (ISE), and Ag/AgCl electrode on PDMS/lignin composite were used to measure the potential difference at various different concentrations of both Na+(10(-1)-10(-7)) and K+ ions (10(-1)-10(-8)), and our sensor showed high sensitivity values of 63.6 mV/dec (Na+, n = 6) and 59.2 mV/dec (K+, n = 7), respectively; these results almost completely follow Nernstian behavior (which predicts values of R-2 =0.99988 and 0.99855, respectively) and indicate cyclic stability (5000 cycles, Gauge Factor of ~20). This simple fabrication of a multifunctional and cost-effective sensor platform indicates real-time changes of sodium and potassium ions in sweat and strain generated by human body motion. (C)& nbsp;2021 The Authors. Published by Elsevier B.V. CC_BY_4.0