| 초록 |
In recent days, gas sensors have been attracting great interests for various purposes such as monitoring indoor air quality, detecting harmful gases, or providing information on food storage. Among them, researches on gas sensors to detect the gaseous substances from human body have been extensively conducted. The composition of gaseous substances from human activity like breathing contains information about health status such as diabetes, respiratory diseases, or even cancers. Even if there exist various gas sensor technologies to detect those substances from human breath, however, they cannot continuously monitor every single breath due to their rigid platform restricting them from being attached close to human breath. Therefore, gas sensors with a simple and flexible structure with capability of positioning near human breath are required. Here, we report knittable and wearable gas sensors based on reduced graphene oxide (rGO) covered carbon fabrics (CFs) decorated with metal catalysts for enhanced selectivity. The rGO junctions between rGO covered CFs synthesized by annealing graphene oxide (GO) electrodeposited CFs, function as an active material for gas sensing, and metal catalysts (Cu, Pt, and Pd) were decorated to enhance selectivity between various gases (H2S, H2, volatile organic compounds). MoS2 also has the capacity of detecting NO2 on its edge sites. MoS2 is applied to CFs by hydrothermal method. Since CFs are flexible and soft, gas sensors based on them are knittable and ultimately capable of direct application into clothes, the optimal location for monitoring human breath. |
