Sensors Expo & Conference 2020

A classic challenge in gas sensing is chemical selectivity of the sensing material. A new class of materials, metal-organic frameworks (MOFs), can take on thousands of forms, each with unique chemical adsorption properties. In this session, David Gardner discusses their work demonstrating that MOFs can be used directly as a sensing material on the chemical-sensitive field-effect transistor (CS-FET), an ultra-low-power sensing platform. An unexpected challenge of the CS-FET platform was interference from off-target molecules reacting with the SiO2 gate dielectric, and we show how this interference can be eliminated. He shows several highly chemically-selective metal-organic framework sensing materials, including HKUST-1 for humidity, ZIF-8 for nitrous oxide, and MFM-300 for ammonia.