Incorporating Wireless Strategies to Wearable Devices Enabled by a Photocurable Hydrogel for Monitoring Pressure Information

Abstract

Advances in emerging technologies for wireless collection and the timely analysis of various information captured by wearable devices are of growing interest. Herein, a crosslinked ionic hydrogel prepared by a facile photocuring process is proposed, which allows wearable devices to be further incorporated into two wireless integrated systems for pressure monitoring applications. The device exhibits a simplified structure by effectively sharing functional layers, rather than conventional two separate combinations, offering the salient performance of iontronic sensing and electrochromic properties to simultaneously quantify and visualize pressure. The developed smart patch system is demonstrated to monitor physiological signals in real-time utilizing the user interface of remote portable equipment with the Bluetooth protocol and on-site electrochromic displays. Moreover, a passive wireless system based on the magnetic coupling effect is designed, which can operate free from the battery and simultaneously acquire multiple pressure information. It is envisioned that the strategies would hold enormous potential for flexible electronics, versatile sensing platforms, and wireless on-body networks.

Highly Sensitive Capacitive Fiber Pressure Sensors Enabled by Electrode and Dielectric Layer Regulation

“…Soft pressure sensors, as an important part of flexible electronics, are in increasing demand in the fields of artificial intelligence, 1,2 human−machine interface, 3,4 and health monitoring. 5,6 As an indispensable item in daily life, textile is the ideal choice for electronic skin. 7−9 Fiber is the smallest component of textiles, and the development of one-dimensional (1D) electronic materials can give electronic skin more freedom.…”

“…Soft pressure sensors, as an important part of flexible electronics, are in increasing demand in the fields of artificial intelligence, , human–machine interface, , and health monitoring. , As an indispensable item in daily life, textile is the ideal choice for electronic skin. − Fiber is the smallest component of textiles, and the development of one-dimensional (1D) electronic materials can give electronic skin more freedom. , In addition, fiber electronics are also the cornerstone of two-dimensional (2D) textile electronic devices and three-dimensional (3D) smart clothing. , Therefore, the functional development of electronic skin at the 1D fiber level is a necessary research trend.…”

Highly sensitive strain sensors based on dispensing technology for human–machine interaction

“…Although the preparation of the strain sensors mentioned above is simple and flexible, their sensitivity in detecting human joint motion is low and they cannot respond quickly to external stimuli. Therefore, optimizing sensor performance to achieve accurate hand motion monitoring while ensuring a simple and flexible preparation process is the main challenge faced by current researchers [30][31][32][33][34].…”

Biomimetic Electronic Skin for Robots Aiming at Superior Dynamic-Static Perception and Material Cognition Based on Triboelectric-Piezoresistive Effects

“…Skin-like tactile perception is of great significance for robots to interact with the surroundings or achieve precise motor tasks. − In the past decades, a series of electric skins (e-skins) based on various working mechanisms have been reported by mimicking the mechanoreceptors inside biological skin, − which plays a major role in sensitivity to external mechanical stimuli. Generally speaking, the e-skins with triboelectric and piezoelectric mechanisms are often applied for the mimicry of FA receptors that selectively perceive the dynamic pressure, − while the piezoresistive and capacitive methods are used for the SA-mimicking e-skin to detect the static pressure discriminatingly. − Although notable progress in the development of e-skins for tactile perception has been achieved, research on e-skins simulating both dynamic and static pressures simultaneously is still limited. Meanwhile, e-skin for comprehensively mimicking human tactile functions also requires the characteristics of high sensitivity as well as a wide response range with simple and cost-effective fabrication methods.…”