Reviews of wearable healthcare systems based on flexible gas sensors

Wearable health monitoring technologies have garnered extensive public attention, leading to significant economic and societal impacts. These advancements have prompted changes in medical practices and personal lifestyles. Among these innovations, flexible gas sensing systems have become crucial devices in wearable technology, capable of detecting various stimuli associated with exhaled biomarkers or specific environments. In recent years, there have been substantial advancements in the commercialization and research of flexible gas sensors. In the realm of health monitoring, research has primarily focused on flexibility, biocompatibility, low power consumption, miniaturization, and integration. This study provides a summary of the latest developments and advantages of smart wearable health monitoring systems based on flexible gas sensors in practical electronic applications. Additionally, it outlines various strategies for wearable health sensing systems, such as flexibility/stretchability, biocompatibility, self-healing, low power consumption, and self-powering. Furthermore, the potential applications of wearable gas sensing systems in healthcare are briefly discussed. The conclusion presents challenges and prospects in this field.