Suin Jo‡, Chi Ho Lee‡, Haneul Jin‡, Eunsoo Lee, Sang Uck Lee, Sung Jong Yoo*, Kwangyeol Lee*, Jongsik Park* Remnant Copper Cation-assisted Atom Mixing in Multicomponent Nanoparticles ACS Nano 2024, 18, 15705. DOI: 10.1021/acsnano.4c01997