The schematic illustration of BP-Au-thiosugar nanosheets (BATNS) as photothermal-induced tumor killing agent for HCC. A The synthesis of BATNS. B The schematic illustration of BP-Au-thiosugar nanosheets (BATNS) as photothermal-induced tumor killing agent induce the increase of local NK cell infiltration caused by the thermal effect of BATNS photothermal treatment for HCC