TEM images of uncapped Ag _x In_1-x BNPs, for x = 0.25, 0.50 and 0.75 (from left to right). Both STEM-HAADF and HR-TEM modes reveal that Ag_0.75In_0.25 BNPs are composed of a mono-phased Ag-rich alloy while Ag_0.50In_0.50 and Ag_0.25In_0.75 particles adopt a core@shell structure with an Ag-rich alloyed core and a shell made of c-In₂O₃. In the cores, several Ag-rich phases (ς-Ag₇In₃, Ag₂In) were identified. Some FCC structures cannot be unambiguously indexed and the existence of pure silver cores in some BNPs cannot be excluded.