With the rapid development of industrialization and urbanization, large amount of volatile organic compounds (VOCs) have been emitted into the atmosphere, causing serious air pollution. VOCs monitoring，like metal oxide semiconductor VOCs sensor, is usually small and low-cost. However, poor selectivity, especially for VOCs molecules, is the bottleneck that limits its applications. A research group led by prof. MENG Gang conducted a series of study on VOCs molecule recognition. Important breakthroughs were made recently. The expanded NiO based sensors and smart recognition system, which was constructed by thermally modulated metal oxide sensors, realized successful discrimination of multiple VOCs with similar structure and properties.
Kagome structure originated as an old Asian Bamboo basket with both trigonal and hexagonal structures. Recently, the coexistence of charge density wave (CDW) state and superconductivity has been discovered in a new type of quasi-two-dimensional Kagome system AV3Sb5 with the kagome lattice of V atoms. Although the charge density wave and superconductivity have been investigated intensively, the non-trivial electronic band structure have been rarely studied.
The surface plasmon resonance effect caused by the interaction of free electrons on the surface of precious metals with light at specific wavelengths has been widely used. The ordered arrays of tightly expelled gold nanoparticles loaded on hydrogels has received much attention. However, the method of loading construction is to synthesize the noble metal nano-array on the solid substrate, and then transfer to the hydrogel to form the composite film structure, which not only makes the synthesis process complex, but also causes defects such as the introduction of dislocations in the transfer process, which greatly affects the quality of the composite array structure.
Atmospheric parameter sounding is a necessary input parameter and a reference for atmosphere and environmental protection departments to master the atmospheric conditions, conduct atmosphere and air quality forecasting and formulate corresponding emergency control strategies.
Nitrous oxide (N2O) and carbon monoxide (CO) play important roles in global warming. However, there are many difficulties in reliable long-time monitoring, especially for N2O, as the concentration of N2O in atmospheric is only a few hundred part per billion, while the compatibility precision is 0.1 part per billion recommended by World Meteorological Organization (WMO).