Impurity doping is a promising method to impart new properties to various materials. Due to
their unique optical, magnetic, and electrical properties, rare-earth ions have been …

Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass
human olfaction. Like mammalian olfaction, a larger number of sensors and more signal …

Metal-oxide nanomaterials (MONs) have gained considerable interest in the construction of
flexible/wearable sensors due to their tunable band gap, low cost, large specific area, and …

Investigations into the mechanisms governing the behavior of metal oxide gas sensors
continue to be of great interest. Oxygen vacancies are a ubiquitous defect in this class of …

High-precision gas sensors operated at room temperature are attractive for various real-time
gas monitoring applications, with advantages including low energy consumption, cost …

The direct discharge of industrial wastewater into the environment results in serious
contamination. Photocatalytic treatment with the application of sunlight and its enhancement …

Developments of advanced sensors for NO 2 gas with high sensitivity and selectivity are
essential but challenging. In this work, a Ce-doped ZnO nanoarray (termed as CZO) was …

Surface oxygen vacancy defects (OV) are regarded to be beneficial to the gas sensing
behavior by significantly improving the carrier density and providing more oxygen …

Hydrogen–air mixtures are highly flammable. Hydrogen sensors are therefore of paramount
importance for timely leak detection during handling. However, existing solutions do not …

Timely detection of formaldehyde is pivotal because formaldehyde is slowly released from
the indoor decorative materials, jeopardizing our healthy. Herein, a high-response …