10:05 AM - 10:35 AM
[21a-A401-2] Small, Low-energy Molecular Sensors: Their Integration and Potential Applications
Keywords:molecular sensor, Joule self heating
In the Internet of Things (IoT) era, detecting and recognizing various information around us using sensors are increasingly important. However, it is difficult for small, low-enegy sensors to selectively detect kinds of low-weight molecules and their concentrations. By utilzing the Joule heating, we have succeeded in reducing the energy consumption of gas sensors and adding multifunctionality to them. Furthermore, the multiple types of sensors can be integrated on a single chip by utilizing the advantages of Joule heating in terms of localization of heat in space and time. To achieve higly integrated sensing systems, we have developed sensors with various nanomaterials such as metal nanosheets, oxide nanowires, and ion gels. In this presentation, we report 1) an acetone sensor using low-resistance WO3 nanowires, 2) a multi-electrode ion-gel-based multi-component gas sensing system, and 3) an ammonia sensor based on Co-porphyrin-modified graphene.