As an initial steptoward the identification of breast cancer cell type with a smartphoneFC, fixed SK-BR3 cells, MDA-MB-231 cells, or MCF-7 cells were incubatedwith SiO2@(QD650-CM-Dex)-(anti-ER), SiO2@(QD585-CM-Dex)-(anti-MUC1),and SiO2@(QD540-CM-Dex)-(anti-HER2) conjugates and thenrun through the smartphone FC (Figure 6A). Here, ESR1 is linked to breast cancer.