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Photothermal therapy of murine 4T1 tumor. Mice were inoculated with 4T1 tumor cells, and divided into 4 treatment groups (n = 8). When tumors reached an average size of 150–200 cm3, the tumor mice were administrated with free HAuNS or the same amount of HAuNS in pSi nanoassembly by intra-tumor injection, and treated with NIR. The PBS and pSi groups served as controls. The result was a summary of tumor weight 10 days after treatment.
