One‐Step Preparation of Lanthanide‐Doped Polyurea Multicolor Microspheres for Versatile Fluorescent Applications. - Zhang, Guiyu; Yu, Xiaoxia; Wang, Xinhui; Kong, Xiang Zheng; Gu, Xiangling; Liu, Jitao; Li, Shusheng; Zhu, Xiaoli; Cao, Lianbao; Jiang, Xubao (Advanced Science, 2026)