EGFR and glioblastoma: To maximize the potency of the AE emitted by 197Hg, we further conjugated these [197Hg]Hg-AuNPs to the anti-epidermal growth factor receptor (EGFR) monoclonal antibody, panitumumab (Vectibix®, Amgen) which binds and internalizes them into GBM cells.