Book excerpt: Advanced Nanomaterials for Inexpensive Gas Microsensors: Synthesis, Integration and Applications presents full coverage in the area of gas sensing nanomaterials, from materials, transducers and applications, to the latest results and future direction. Experts present work on metal oxides, carbon-based and hybrid materials, fabrication and application. The book brings together three major themes, including synthesis, functionalization and the characterization of advanced nanomaterials, all emphasizing synthesis techniques that ease the integration of nanomaterials in transducers. Chapters encompass a wide spectrum of sensing technologies, including advanced nanomaterials (metal oxides, carbon materials and graphene) and organic molecular materials and atomic layers (MoS2). The book's authors examine the coupling of sensitive nanomaterials to different types of transducer elements and their applications, including direct growth and additive fabrication techniques as a way to obtain inexpensive gas microsensors, principal transduction schemes, and advanced operating methods. - Presents technological solutions and applications of gas sensors in varied areas of chemistry, physics, material science and engineering - Examines advanced operating methods (e.g., temperature modulation, self-heating, light-activated response, noise methods) to enhance stability, sensitivity, selectivity and reduce power consumption - Provides a critical review of current applications and their expected future evolution, demonstrating the most promising approaches and future expectations in the development of inexpensive gas micro- and nanosensors