Chemiresistive Metal Oxide Gas Sensors for Room-Temperature Detection
This community develops solid-state sensors that detect specific gases, such as nitrogen dioxide, hydrogen, and ammonia, at room temperature. The work focuses on creating materials that change their electrical resistance when they interact with target molecules, enabling highly sensitive and selective detection without the need for high-temperature heating elements.
The research centers on metal oxide semiconductors, particularly tin dioxide and zinc oxide, often engineered as thin films or nanoparticles. A significant portion of the work involves enhancing sensitivity and selectivity through the introduction of oxygen vacancies, doping with noble metals, or combining these oxides with graphene and carbon-based materials. The primary applications named in the literature include environmental monitoring, industrial safety, and the detection of volatile organic compounds. The recurring methodological focus is on the synthesis of these materials and the study of their interaction mechanisms with target gas molecules to optimize response speed and stability.
The largest share of the community's output is found in tin research, accounting for 3.3% of all tin research, and 2,657 papers here. Zinc research follows, representing 1.9% of all zinc research with 1,702 papers. Tungsten contributes 1.2% of its research, comprising 922 papers.
The community comprises 16,420 papers, with the majority published in Sensors and Actuators B: Chemical, Journal of Alloys and Compounds, and Applied Surface Science.
Recent work continues to focus on the integration of these sensing materials into flexible and wearable devices, as well as the development of heterostructures for detecting trace levels of toxic gases like nitrogen dioxide and hydrogen sulfide.