Complex and Composite Metal Oxides for Gas, VOC, and Humidity Sensors, Volume 1: Fundamentals and Approaches provides an overview of the advanced nanocomposite metal oxide materials and their uses as gas, VOCs and humidity sensors, which are widely applicable for environmental monitoring in various industries. The first of the two volumes, Fundamentals and Approaches introduces the ground rules essential for the development of smart gas, VOC, and humidity sensors. This volume familiarizes researchers with the different sensors (resistive, electrolyte, optical, etc.) fabricated using metal oxide hybrids and nanocomposites that employ various properties such as electrical, QCM and SAW, SPR, luminescence, and fiber optics. It is a key resource for materials scientists and engineers in academia and R&D as well as environmental scientists.