Ultrasensitive Pressure Sensor Sponge Using Liquid Metal Modulated Nitrogen-Doped Graphene Nanosheets

Abstract

Wearable pressure sensors are crucial for real-time monitoring of human activities and biomimetic robot status. Here, the ultrasensitive pressure sensor sponge is prepared by a facile method, realizing ultrasensitive pressure sensing for wearable health monitoring. Since the liquid metal in the sponge-skeleton structure under pressure is conducive to adjust the contact area with nitrogen-doped graphene nanosheets and thus facilitates the charge transfer at the interface, such sensors exhibit a fast response and recovery speed with the response/recovery time 0.41/0.12 s and a comprehensive response range with a sensitivity of up to 476 KPa −1 . Notably, the liquid metal-based spongy pressure sensor can accurately monitor the human body's pulse, the pressure on the skin, throat swallowing, and other activities in real time, demonstrating a broad application prospect. Those results provide a convenient and low-cost way to fabricate easily perceptible pressure sensors, expanded the application potential of liquid metal-based composites for future electronic skin development.

Biocompatible and breathable healthcare electronics with sensing performances and photothermal antibacterial effect for motion-detecting

“…Benefiting from its porous structure, hydrophilic (Fig. 2j) and elasticity, the sponge provides a good solution for preparing breathable and comfortable sensors [50][51][52][53] .…”

Biocompatible and Breathable Healthcare Electronics with Sensing Performances and Photothermal Antibacterial Effect for Sport Rehabilitation

“…Bene ting from its porous structure, hydrophilic (Fig. 2j) and elasticity, the sponge provides a good solution for preparing breathable and comfortable sensors [48][49][50][51] .…”

Liquid Metal-Templated Tin-Doped Tellurium Films for Flexible Asymmetric Pseudocapacitors

“…This is due to the semi- and post-transition metals’ combined unique features of good conductivity and electrochemistry. Liquid metals, on the other hand, are highly conductive and deformable, and they can be painted as thin films onto flexible substrates . These merits introduce them as excellent current collectors and flexible substrates for supporting and synthesizing electrochemically active materials (including tellurium-based materials).…”

“…Liquid metals, on the other hand, are highly conductive and deformable, 32 and they can be painted as thin films onto flexible substrates. 33 These merits introduce them as excellent current collectors and flexible substrates for supporting and synthesizing electrochemically active materials (including tellurium-based materials). The interfaces of liquid metals can potentially establish intimate contacts with the tellurium-based entities.…”