Skin-friendly corrugated multilayer microspherical sensor fabricated with silk fibroin, poly (lactic-co-glycolic acid), polyaniline, and kappa-carrageenan for wide range pressure detection

Xu, Mengting; Cai, Haihua; Liu, Zulan; Chen, Fangchun; Wang, Yujia; Dai, Fangyin; Li, Zhi

doi:10.1016/j.ijbiomac.2021.11.122

Cited by 11 publications

(3 citation statements)

References 46 publications

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“…From the cyclic durability test results in Figure f, it can be seen that the HMSFP–FSC pressure sensor can withstand more than 900 pressure loading/unloading cycles, showing good potential in long-term use. The HMSFP–FSC flexible pressure sensor proposed in this study exhibits good comprehensive performance in terms of sensitivity, response time, and detection range, compared with the reported flexible thin-film substrate pressure sensors − (Table ).…”

Section: Resultsmentioning

confidence: 84%

Flat Silk Cocoon Pressure Sensor Based on a Sea Urchin-like Microstructure for Intelligent Sensing

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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Developing high-performance wearable electronic devices based on natural materials with unique structures has become a research hot spot in the field of flexible electronics. Here, taking advantage of natural flat silk cocoon (FSC) by controlling the spinning process of Bombyx mori, sea urchin-like sunflower pollen loaded with MXene nanosheets was sprayed on the FSC at a fixed time interval to fabricate multi-layered piezoresistive sensors. The sea urchin-like structure of SFP is beneficial to MXene loading, and the good elasticity of sunflower pollen can withstand a large mechanical deformation. The prepared pressure sensor has a high sensitivity of 0.028 kPa–1 and good durability, and it can respond quickly to the applied pressure changes (response/recovery times are 140 ms/130 ms, respectively). With these excellent sensing performances, the fabricated sensors are capable of monitoring human physiological activities and physiological signals and can be applied in information encryption transmission with the combination of the Morse code. The pressure sensor developed based on the natural FSC structure shows broad application prospects in the field of flexible wearable electronic devices.

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Section: Resultsmentioning

confidence: 84%

Flat Silk Cocoon Pressure Sensor Based on a Sea Urchin-like Microstructure for Intelligent Sensing

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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“…These results demonstrate that the sensor is sensitive to detecting most kinds of deformation and movement of the human body. Compared with previous pressure sensors made of biomass hydrogels with high water content, − the skin-inspired sensor reported in this work shows excellent sensitivity for a larger pressure range (50–500 Pa) (Figure i). However, it is still a challenge to directly extract and distinguish information from similar weak short signals such as the voice vibration, limiting the application range of the sensor.…”

Section: Resultsmentioning

confidence: 99%

Machine Learning-Enhanced Biomass Pressure Sensor with Embedded Wrinkle Structures Created by Surface Buckling

Chen,

Xia,

Yan

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible piezoresistive sensors are core components of many wearable devices to detect deformation and motion. However, it is still a challenge to conveniently prepare highprecision sensors using natural materials and identify similar short vibration signals. In this study, inspired by microstructures of human skins, biomass flexible piezoresistive sensors were prepared by assembling two wrinkled surfaces of konjac glucomannan and kcarrageenan composite hydrogel. The wrinkle structures were conveniently created by hardness gradient-induced surface buckling and coated with MXene sheets to capture weak pressure signals. The sensor was applied to detect various slight body movements, and a machine learning method was used to enhance the identification of similar and short throat vibration signals. The results showed that the sensor exhibited a high sensitivity of 5.1 kPa −1 under low pressure (50 Pa), a fast response time (104 ms), and high stability over 100 cycles. The XGBoost machine learning model accurately distinguished short voice vibrations similar to those of individual English letters. Moreover, experiments and numerical simulations were carried out to reveal the mechanism of the wrinkle structure preparation and the excellent sensing performance. This biomass sensor preparation and the machine learning method will promote the optimization and application of wearable devices.

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“…For example, corrugated structures, and kirigami structures were employed to achieve the stretchability of breathable skin-mountable electronics. 166–168 Here, we elaborate kirigami structures. Li et al reported a kirigami-structured electrode using an electrospinning SEBS and laser cutting technique.…”

Section: Propertiesmentioning

confidence: 99%

Toward a new generation of permeable skin electronics

et al. 2023

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Skin-friendly corrugated multilayer microspherical sensor fabricated with silk fibroin, poly (lactic-co-glycolic acid), polyaniline, and kappa-carrageenan for wide range pressure detection

Cited by 11 publications

References 46 publications

Flat Silk Cocoon Pressure Sensor Based on a Sea Urchin-like Microstructure for Intelligent Sensing

Flat Silk Cocoon Pressure Sensor Based on a Sea Urchin-like Microstructure for Intelligent Sensing

Machine Learning-Enhanced Biomass Pressure Sensor with Embedded Wrinkle Structures Created by Surface Buckling

Toward a new generation of permeable skin electronics

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