Time-resolved aerosol infrared spectroscopy

Time-resolved aerosol infrared spectroscopy

Since the physical, chemical and optical properties of aerosols often evolve over time, strongly correlated with the temperature and pressure of the ambient environment and presence of other chemical species, our laboratory has built a set of time-resolved temperature-variable aerosol infrared spectroscopy apparatus. By precisely controlling the temperature and pressure of the aerogel generating cavity, the constituent molecules of the aerogel directly aggregate in the aerogel cavity to form clusters and then nucleates, including homogeneous and heterogeneous nucleation. The phase change process, structural characteristics of aerosol and its correlation with the surrounding environment (such as the type of suspended gas, pressure, temperature and the presence or absence of other particles, etc.) can be analyzed by a time-resolved Fourier Transform Infrared Spectrometer. The key features of this apparatus includes:

• Temperature-controlled low-temperature aerosol in-situ generating cavity
• Adjustable optical path can greatly improve sensitivity and signal-to-noise ratio
• Directly observe the formation of aerosol particles and their structural changes over time and the surrounding environment