A Review of Conductive Hydrogel-Based Wearable Temperature Sensors.

Conductive hydrogel has garnered significant attention as an emergent candidate for diverse wearable sensors, owing to its remarkable and tailorable properties, such as flexibility, biocompatibility, and strong electrical conductivity. These attributes make it highly suitable for various wearable sensor applications (e.g., biophysical, bioelectrical, and biochemical sensors) that can monitor human health conditions and provide timely interventions. Among these applications, conductive hydrogel-based wearable temperature sensors are especially important for healthcare and disease surveillance. This review aims to provide a comprehensive overview of conductive hydrogel-based wearable temperature sensors. First, we summarize different types of conductive fillers-based hydrogel, highlighting their recent developments and advantages as wearable temperature sensors. Next, we discuss the sensing characteristics of conductive hydrogel-based wearable temperature sensors, focusing on sensitivity, dynamic stability, stretchability, and signal output. Then, state-of-the-art applications are introduced, ranging from body temperature detection and wound temperature detection to disease monitoring. Finally, we identify the remaining challenges and prospects of this field. By addressing these challenges with potential solutions, we hope that this review can shed some light on future research and innovations in this promising field. This article is protected by copyright. All rights reserved.