For example, QDs conjugated with anti-HER2 antibodies can selectively bind to HER2-positive cancer cells, enabling high-resolution imaging and targeted drug delivery.181 Similarly, peptides such as arginine-glycine-aspartate (RGD), which targets integrins that are overexpressed in TNBC, can be conjugated to QDs for tumor-specific accumulation.182 Copper indium zinc sulfide (CuInZnxS2+x, ZCIS) QDs were surface-functionalized with the anti-HER2 peptide LTVSPWY, which is specifically designed to target HER2-overexpressing SKBR3 breast cancer cells. Here, ERBB2 is linked to cancer.