TP53 and breast cancer: f-SWNTs-COS-GTX-p53, f-SWNTs-COS-GTX-lysozyme, and f-SWNTs-COS-GTX-FA showed significant cytotoxicity against cervical cancer (HeLa) cells and breast cancer (MCF-7) cells, and f-SWNTs-COS-GTX-p53 was found to be the most effective delivery vehicle with a controlled release and enhanced cytotoxicity rendered through apoptosis in HeLa cells.