Scorpion-inspired dual-bionic, microcrack-assisted wrinkle based laser induced graphene-silver strain sensor with high sensitivity and broad working range for wireless health monitoring system

Wang, Wentao; Lu, Longsheng; Liang, Zhanbo; Lin, Honghao; Li, Zehong; Wu, Xiaohua; Lin, Lihui; Xie, Yingxi

doi:10.1007/s12274-022-4680-0

Cited by 31 publications

(9 citation statements)

References 65 publications

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“…Consequently, the MGCC sensor is highly suitable for monitoring minute strains in the human body, such as subtle changes in facial muscle movements. Figure d shows a comparison of the sensors with those reported in the literature. − MGCC achieves a wide strain-sensing range and high sensitivity. As shown in Figure e, the strain loading test at 600 mm/min achieved a response/recovery time of 160/360 ms, and the shorter response/recovery time is favorable for the real-time monitoring of human bio signals.…”

Section: Resultsmentioning

confidence: 99%

Flexible Strain Sensor Based on Copper/Graphene Composite Films

Zhu,

Zhang,

Lin

et al. 2023

ACS Appl. Nano Mater.

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This study analyzed a flexible strain sensor with torsional low interference, waterproofing, and self-adhesive properties using a copper/ graphene microcrack composite film as a strain-sensitive layer and a selfadhesive silica gel as a waterproofing and self-adhesive layer. The sensor exhibits a wide response range (with a strain capability of up to 110%), high sensitivity (with a gauge factor of 847.87 (92% < ε < 110%)), and satisfactory sensing durability (with response cycles of 10000 under 25% strain) and can detect ultrasmall strains (0.2% strain). In addition, the sensor exhibits similar real-time dynamic responses at different strain levels (0%−40%) and states (untwisted, twisted by 90°, and twisted by 180°), indicating its characteristic of torsional low interference. Moreover, the self-adhesive silica gel allows the sensor to directly adhere to the skin surface, reducing motion artifacts and improving the accuracy of monitoring complex strain states during underwater activities. Therefore, the flexible strain sensor holds potential as a nextgeneration flexible strain sensor for underwater use.

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Section: Resultsmentioning

confidence: 99%

Flexible Strain Sensor Based on Copper/Graphene Composite Films

Zhu,

Zhang,

Lin

et al. 2023

ACS Appl. Nano Mater.

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“…The sensor’s relative resistance is maximized, and the sensor expires. The BRMS strain transducers are compared with the recent flexible strain transducers, and the results are shown in Figure S4 and Table S2. − …”

Section: Results and Discussionmentioning

confidence: 99%

Graphene/Carbon Nanotube Conductive Ink-Based Biomimetic Structure for Self-Powered Flexible Medical Monitoring Devices

Wang,

Li,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Soft wearable sensing devices have attracted extensive research attention in the fields of e-skin and human health monitoring due to the advantages of integrated functions and good biocompatibility. However, existing sensors are unable to achieve a highly sensitive response over a wide sensing range. In addition, the sensors require an external power supply during utilization. To overcome this key challenge, in this paper, we propose a conductive ink of GN-CNTs prepared with graphene and carbon nanotubes as conductive fillers and N,N-dimethylformamide as the solvent. A self-powered flexible wearable sensing microsystem with a bionic round-leaf motherwort structure is constructed using a thermoplastic polyamide film as a flexible substrate. The bionic round-leaf motherwort structure (BRMS), which can reduce the stress concentration distribution, can obtain a larger tensile strain range. The prepared BRMS flexible electrodes can be used for electrocardiography (ECG) signal acquisition and recording at three different sites such as the chest, fingertip, and wrist. The flexible electrodes have a higher ECG signal amplitude and signal-to-noise ratio. The friction layer electrodes are printed with conductive ink prepared by printing GN-CNT conductive inks. Following this, a friction nanogenerator is assembled to collect low-frequency mechanical energy. Supercapacitors were prepared by an assembly process using conductive silver paste and GN-CNT conductive ink coating. There is no obvious capacitance decay phenomenon under different angles and other deformation states, and it has an excellent energy storage performance. In this sensing microsystem, strain sensors and flexible electrodes can be directly driven from a power source consisting of a friction nanogenerator and a supercapacitor. It can be used for a long time for low-power detection of human motion detection and medical ECG monitoring.

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“…7 shows a comparison of the highest GFs of the hydroxylated MWCNT/Ecoflex sensor and other previously reported similar strain sensors at maximum tensile strain. 18,19,[33][34][35][36][37][38][39]…”

Section: Resultsmentioning

confidence: 99%