Our research basically revolves around quantifying the relative contributions of various aerosol components in toxicity, elucidating their unique mechanisms of action, and replicating those mechanisms in laboratory to gain a better understanding of the impact of various emission sources and atmospheric processes on human health. We have been fortunate enough to work on various projects focused on the oxidative potential and toxicity of ambient PM2.5. These projects have been mostly funded by National Science Foundation of US, Swiss National Science Foundation, Jump ARCHES, and ZJU-UIUC Institute Research Program.  Broadly, our research projects can be classified in five major themes: