Fig. 2

Atomic structure of Au3Ag nanoframes revealing rich crystalline defects. a High-resolution lattice details on one of the edges displaying an edge dislocation, high-index surface atoms, point defects, and tilt grain boundaries. b High-resolution lattice details on one of the vertices displaying stepped surface atoms, screw dislocations, and twist grain boundaries. c Transmission electron microscopy (TEM) overview of the nanoframe. d Energy-dispersive X-ray (EDX) mapping images of Au and Ag on a vertex connecting four edges