“Enhancement of single upconversion nanoparticle imaging by topologically segregated core-shell structure with inward energy migration” was published in Nat Communications. The senior author, Dr. Qian Liu at Fudan University, was a postdoc in the group. Dan was a co-corresponding author. The editors at Nature Communcations have selected it as one of the 50 best papers recently published in the area, and have selected it for their Editors’ Highlight page. Read more.