Competitive reactivity drives size- and composition-focusing in multimetallic nanocrystals. - Yoon, Jeesoo; Oh, Jinwon; Kim, Dongjun; Chung, Pin-Hung; Hong, NaHyeon; Heinlein, Jake; Lizandara-Pueyo, Carlos; Sánchez-Carrera, Roel S.; Park, Jungwon; Jung, Hee-Tae; Cargnello, Matteo (Science, 2026)