Figure 2: Structural identification of SbGnPs at the atomic level.

(a) Bright-field (BF) TEM image of SbGnPs after ball-milling. Scale bar, 20 nm; (b) Atomic-resolution (AR) TEM image obtained from the region marked with a red square. Scale bar, 2 nm; (c) HAADF STEM image showing the contrast of single Sb atoms at the edges of SbGnPs. Scale bar, 1 nm; (d) AR-TEM image of a single Sb atom attached at the graphene edge with an armchair configuration. The inset is the fast Fourier transform (FFT) of the image. Scale bar, 1 nm.