Fig. 3: Polymeric structure of Ag₇₇Cu₂₂ NCs.

a The linkage of Ag₇₇Cu₂₂ NCs (H atoms are omitted for clarity). b Space-filling view of the Ag₇₇Cu₂₂ chain (C and H atoms are omitted for clarity). c The arrangement of Ag₅₆S₄₈ shells along the Ag₇₇Cu₂₂ chain (C and H atoms are omitted for clarity). d 3D framework of Ag₇₇Cu₂₂ nanowires and view of the superlattice from the z-axis (note that the two-color scheme in Fig. 3d does not indicate the chirality, but means different chains in the crystal packing). H atoms are omitted for clarity. The length unit is Å. Color codes: cyan, green, pink, purple, Ag; pale pink, Cu; yellow, red, S; gray, orange, C.