Research & Development Project

Generation and characterisation of carbonaceous aerosols using Multiwavelength Photoacoustic System (MUWAPAS)

Task leader:
mgr Emeka Ugboma
Funding institution:
Realization period:
Feb. 2, 2020 - May 28, 2021
mgr Emeka Ugboma Task leader

In our study, we produced carbonaceous aerosol particles through the process of laser ablation, specifically targeting a high-grade graphite tablet within an ablation chamber. We then conducted an in-depth examination of the microphysical characteristics of these particles. Our analysis focused on several key variables: the laser energy (fluence), the chemical composition of the particles, and the flow rate of the gas used to clear the chamber (purging gas). We investigated how each of these factors influenced the formation of the particles. The innovative particle generator we've introduced is capable of creating particles that either take on spherical shapes or form complex aggregates, including those with mixed modes of particle sizes. The microphysical properties we measured demonstrate that the particles we generated closely resemble those found in the Earth's atmosphere in terms of their physical and chemical characteristics.