Wearable, self-cleaning, wireless integrated tactile sensory system with superior sensitivity

Li, Xuan; Wang, Weidong; Wu, Lingjun; Zhao, Haitao; Wang, Meng; Wang, Yuejiao; Xu, Hongcheng; Liu, Min; Gao, Libo

doi:10.1016/j.sna.2021.113027

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…The innovation of advanced flexible and stretchable materials has led to rapid developments of flexible pressure sensors with applications in various fields, including robotics, [ 1–5 ] wearable electronics, [ 6–19 ] and human‐machine interactions. [ 20–28 ] Pressure sensing is commonly achieved by converting local pressure to an electrical signal through mechanisms such as piezoresistive, [ 29–33 ] piezocapacitive, [ 34–37 ] or piezoelectric [ 38–40 ] effect of the sensor.…”

Section: Introductionmentioning

confidence: 99%

Bending and Stretching‐Insensitive, Crosstalk‐Free, Flexible Pressure Sensor Arrays for Human‐Machine Interactions

Yuan,

Xu,

Zheng

et al. 2024

Adv Materials Technologies

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Accurate data acquisition from flexible sensors placed on deformable 3D freeform surfaces is of critical importance for many applications, such as wearable electronics, human‐machine interfaces, and soft robotics. However, the mechanical coupling between the sensor and the deformable subject surface to bending and stretching deformations can significantly reduce the accuracy of the acquired data. This study combines a polyimide (PI) micropore isolation layer (PIL) and serpentine electrodes with a flexible piezoresistive sensor to mitigate the issue of mechanical coupling. As a mechanical buffer to distribute the external pressure and reduce the strain concentration, the PIL can avoid the bending interference for bending curvature up to 256 m−1, while maintaining a high sensitivity of S > 21.5 kPa−1. The serpentine electrode design further allows the sensor to reliably acquire data in the presence of stretching up to 45% without cross‐talk. The versatility of the developed sensor is demonstrated in several human‐machine interaction scenarios, including gesture recognition and motion detection. The design strategies on materials and structures from this study can also be applied for the development of other flexible sensors with high sensitivity and low deformation interference to avoid the mechanical coupling between the sensor and the deformable surface.

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Section: Introductionmentioning

confidence: 99%

Bending and Stretching‐Insensitive, Crosstalk‐Free, Flexible Pressure Sensor Arrays for Human‐Machine Interactions

Yuan,

Xu,

Zheng

et al. 2024

Adv Materials Technologies

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“…Flexible pressure sensors are widely used in human-machine interaction (HMI) [ 1 , 2 , 3 ], electronic skin (E-Skin) [ 4 , 5 , 6 ], and human health monitoring [ 7 , 8 , 9 , 10 , 11 ]. In particular, capacitive pressure sensors have attracted a broad attention with their merits of low power, excellent stability and fast response time.…”

Section: Introductionmentioning

confidence: 99%

Monolayer MoS2-Based Flexible and Highly Sensitive Pressure Sensor with Wide Sensing Range

Duan

Yan

et al. 2022

Micromachines

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Flexible pressure sensors play an important role in flexible robotics, human-machine interaction (HMI), and human physiological information. However, most of the reported flexible pressure sensors suffer from a highly nonlinear response and a significant decrease in sensitivity at high pressures. Herein, we propose a flexible novel iontronic pressure sensor based on monolayer molybdenum disulfide (MoS2). Based on the unique structure and the excellent mechanical properties as well as the large intercalation capacitance of MoS2, the prepared sensor holds an ultra-high sensitivity (Smax = 89.75 kPa−1) and a wide sensing range (722.2 kPa). Further, the response time and relaxation time of the flexible sensor are only 3 ms, respectively, indicating that the device can respond to external pressure rapidly. In addition, it shows long-term cycling stability (over 5000 cycles with almost no degradation) at a high pressure of 138.9 kPa. Finally, it is demonstrated that the sensor can be used in physiological information monitoring and flexible robotics. It is anticipated that our prepared sensor provide a reliable approach to advance the theory and practicality of the flexible sensor electronics.

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“…Organic and polymeric substrates are widely used in manufacturing, and in general, the potential producing cost is much lower. To this day, flexible electronics is witnessed to have growing applications in various fields, such as sensors (Sekitani et al, 2009;Gao et al, 2019;Xu et al, 2020;Gao et al, 2021a;Gao et al, 2021b;Gao et al 2020;Huang et al, 2014;Lu et al, 2021;Li et al, 2021), electronic displays (Templier et al, 2007;Mizukami et al, 2018;Zhou et al, 2006;Han et al, 2012), solar cells (Granqvist 2007;Peng et al, 2017), nanogenerators (Liu et al, 2021), transistors (Chung et al, 2019), etc. Polyimides (PI) are one of the most widely polymeric flexible substrates used (Berggren et al, 2007;Lien et al, 2014;Song et al, 2017) due to their excellent flexibility and outstanding thermal stability (T g :ca.…”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Simulation Study: The Inkjet Printing of Graphene Inks on Polyimide Substrates

Wang

Zhao

et al. 2021

Front. Mater.

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Inkjet printing-based 2D materials for flexible electronics have aroused much interest due to their highly low-cost customization and manufacturing resolution. However, there is a lack of investigation and essential understanding of the surface adhesion affected by the printing parameters at the atomic scale. Herein, we conducted a systematic molecular dynamics simulation investigating the inkjet printing of graphitic inks on polyimide substrates under various conditions. Simulations under different temperatures, inkjet velocities, and mechanical loadings such as pressure and deformation are performed. The results show that the best adhesion is achieved in the plasma-modified polyimide/graphene-oxide (mPI/GO) interfacial system (the interaction energy (Ein) between mPI and GO is ca. 1.2 times than with graphene). The adhesion strength decreases with increasing temperature, and higher inkjet velocities lead to both larger impact force as well as interfacial fluctuation, while the latter may result in greater interfacial instability. When loaded with pressure, the adhesion strength reaches a threshold without further improvement as continuing compacting of polymer slabs can hardly be achieved. The detachment of the interfaces was also explored and mPI/GO shows better resistance against delamination. Hopefully, our simulation study paves the way for future inkjet printing-based manufacturing of graphene-based flexible electronics.

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Wearable, self-cleaning, wireless integrated tactile sensory system with superior sensitivity

Cited by 6 publications

References 40 publications

Bending and Stretching‐Insensitive, Crosstalk‐Free, Flexible Pressure Sensor Arrays for Human‐Machine Interactions

Bending and Stretching‐Insensitive, Crosstalk‐Free, Flexible Pressure Sensor Arrays for Human‐Machine Interactions

Monolayer MoS2-Based Flexible and Highly Sensitive Pressure Sensor with Wide Sensing Range

A Molecular Dynamics Simulation Study: The Inkjet Printing of Graphene Inks on Polyimide Substrates

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