Miniaturized Electrochemical Gas Sensors based on Room Temperature Ionic Liquids and Wearable Systems for Rapid Gas Sensing

Various gases are widely utilized in industry, manufacturing, agriculture and even our daily life for heating and cooking. However, potential gas leakage may lead to severe hazards to human health, even lethal risks. Therefore, rapid gas sensing is of great significance to provide timely alerting and prevent hazardous gas exposure. Herein, we present our recent progress in miniaturized electrochemical gas sensors (MEGS) based on room temperature ionic liquids (RTILs) and wearable systems for rapid gas sensing. Different strategies were employed to establish MEGS, including porous substrate-based, thin RTIL film-based and RTIL solidification-based designs. Nanomaterial modification was also explored to enhance the sensing performance. The established MEGS presented good sensitivity, wide linear range and short response time for various gas detection. To achieve wearable gas sensing, two miniaturized electrochemical systems were developed, and the performance was validated for electrochemical tests. The developed RTILs-based MEGS and wearable systems provide a promising avenue for rapid and wearable gas monitoring.