Diversiform gas sensors based on two-dimensional nanomaterials

High-Efficiency Self-Powered Broadband Photodetector Based on PtSe2/MoSe2 Heterojunction

“…Two-dimensional (2D) materials have attracted significant attention in the field of microelectronics and optoelectronics due to their exceptional mechanical, optical, and physical properties generated by their atomically thin dimension, such as broadband operating range, layer-dependent bandgap, tunable electronic and optical properties, and high carrier mobility. − These properties enable 2D materials to be applied in the next generation of photonic, valleytronic, and optoelectronic devices, such as field-effect transistors (FET), gas sensors, solar cells, storage devices, photodetectors . Among them, photodetectors can convert light signals into electrical signals and are widely used in fields such as communication, bioimaging, military, industrial automatic control, and biosensing. − 2D material-based photodetectors can overcome the limitation of bandgap, complex manufacturing process, and high cost of traditional photodetectors, , and can meet the requirements of broadband, high-performance, large-array, and low-cost photodetection.…”

Bulk Trapping Organic Semiconductor with Amino-Additive Enabling Ultrasensitive NO2 Sensors

“…Presently, the majority of commercial semiconductor gas sensors are based on metal oxide type gas sensors, offering an LOD down to ppb level with fast response speed. However, these sensors typically necessitate operation at high temperature. , In recent years, tremendous new materials have been explored for high performance gas sensors, including porous materials, − nanowires and nanofibers, − two-dimensional materials, − and conductive polymers. − Among them, organic semiconductors (OSCs) have emerged as promising candidates due to their advantages such as room temperature (RT) operation, potential selectivity, low cost, and flexibility. − Nevertheless, the performances of OSC gas sensors still fall short of meeting the requirements for practical applications, particularly in terms of response/recovery rate, stability, and repeatability. To tackle these challenges, numerous strategies have been developed, encompassing the design of novel sensing materials, interface modification around the active layer, and the integration of sensor arrays.…”

Pt-Doped HfS2 Monolayer as a Novel Sensor and Scavenger for Dissolved Gases (H2, CO2, CH4, and C2H2) in Transformer Oil: A Density Functional Theory Study

“…Thanks to their large exposed surface area, short electron migration path, and high conductivity, nanomaterials with two-dimensional (2D) structures have been widely recognized as the consummate materials for preparing gas-sensitive substrates of resistivity-type sensors. – For example, graphene, a single layer constructed by carbon atoms, has been researched deeply by theoretical and experimental means for its application potential in gas sensors since it was developed in 2004 . However, the inherent characteristic of a zero band gap limits the practical application of graphene, which drives bright scientists away toward new substitutes for high-qualified gas sensors .…”