Yi-Yu Cai is a postdoctoral researcher in Professor Kagan's laboratory at the University of Pennsylvania. He received his B.S. in chemistry (2011) from Jilin University and M.S. in Chemistry (2014) from Shanghai Jiao Tong University. He earned his Ph.D. in chemistry (2019) from Rice University. He studies the optical properties of self-assembled and lithographically-defined nanomaterials.