Large‐Scale Synthesis of Flexible Cermet Interdigital Electrodes with Stable Ceramic‐Metal Contact for Fire‐Resistant Pressure Tactile Sensors

Abstract

Cermet has broad applications in electronics, but achieving stable ceramic‐metal contact has always been a challenge, particularly at hot temperature and large deformation conditions, due to the significant differences in thermal expansion coefficient and stiffness of ceramics and metals. Here, stress matching and strong interphase bonding at the heterogenous ceramic‐metal contact are realized by using flexible ceramics, leading to stable applications in flexible fire‐resistant pressure tactile sensors. Cu/Au nanolayers are deposited first onto the toughened flexible SiO2 nanofibers with a chemical plating method to form sensitive interdigital electrode sensors, then use an in situ thermal reaction strategy to form conformal and interlocked Au3Cu and CuSiO3 interphases, which enhance the mechanical thermal stability of the ceramic‐metal contact. With deep learning technique, the as‐fabricated intelligent pressure tactile gloves can accurately recognize the human body parts in low‐visible burning environments and show a long‐term stability over 1000 cycles with a high sensitivity of 112.18 kPa−1, which is important for developing intelligent firefighting.

Continuous Rapid Fabrication of Ceramic Fiber Sponge Aerogels with High Thermomechanical Properties via a Green and Low-Cost Electrospinning Technique

“…Specifically, tetraethyl silicate (TEOS) was selected as the silica precursor, with aluminum nitrate and isopropanol aluminum as dopants. TEOS could form a linear −O–Si–O– structure like a polymer chain through hydrolysis and self-condensation reactions (Figure a), and the condensed TEOS sol could be spun into micro/NF films without using polymer template. − The TEOS fibers could transform into silica fibers after a low temperature heat treatment (ex. <100 °C).…”

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.…”