Biomimetic Flexible Capacitive Sensor with Loop Electrode and Snail Tentacle Structure for Enhanced Proximity and Pressure Sensing

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 23, 2025

Flexible electronics have garnered significant attention due to their promising applications in embodied intelligence, smart interaction, and human-machine interface (HMI). In particular, flexible sensors with a detectability of proximity pressure hold great potential areas such as touchless control, health monitoring, robotic perception. Here, we present biomimetic capacitive sensor, called the loop electrode bioinspired snail tentacle sensor (LEBSTS). The loop-patterned layer enhances sensing via fringing field effect, while tentacle-structured polydimethylsiloxane (PDMS) dielectric provides high sensitivity for detection. above design significantly improves performance, achieving long-range detection 140 mm, wide pressure-detection range from 0.9 Pa 500 kPa, 2.844 kPa-1 (0-1 kPa), fast response time 87.5 ms. Moreover, demonstrates good durability, maintaining stable performance over 4500 cycles. Furthermore, application was explored, including human motion HMI, Morse code transmission LoRa wireless communication, visualization systems. This work insights into development high-performance multifunctional offering platform advanced intelligent applications.

Language: Английский

Transparent, Stretchable PVC–Liquid Metal Composite Sensor for Smart Wearable Electronics

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: June 3, 2025

Flexible sensors based on liquid metal (LM) fillers have attracted increasing attention due to their excellent stretchability, flexibility, and biocompatibility. However, simultaneously achieving transparency, high sensitivity, robust mechanical performance remains a major challenge. In this study, we present transparent stretchable flexible composite sensor fabricated by combining poly(vinyl chloride) (PVC) with dibutyl adipate (DBA) incorporating low concentration (0.1 wt %) of LM as the conductive phase. The exhibits transparency 50.12%, resulting from optical clarity PVC/DBA matrix, nanoscale dispersion droplets, formation Ga3+ ions upon partial surface oxidation, which collectively reduce light scattering absorption. PVC also acts stabilizing forming protective interface around droplets enhance interfacial stability. demonstrates stretchability (530%), sensitivity (gauge factor = 4.27), reliable in humid saline environments. This work offers practical strategy for developing transparent, durable, high-performance wearable electronics intelligent systems.

Language: Английский