Fig. 7. (a) Schematic illustration of the dimerization of [Au25(SR)18]− through bridging Ag atoms to form Ag2Au50(SR)36 (colour code: green, core Au(0); cyan, motif Au(i); yellow, S; red, Ag); reproduced with permission from ref. 187. Copyright 2020, Wiley-VCH. (b) Schematic illustration of the formation of nanoribbons by inter-cluster aurophilic interactions between Au NCs: structural anatomy of [Au25(SR)18]− (i), smaller-sized Au NCs formed by surface rearrangement of [Au25(SR)18]− (ii) and their self-assembly into nanoribbons (iii) (colour code: golden, core Au(0); black, motif Au(i); light grey, S); reproduced with permission from ref. 108. Copyright 2019, Wiley-VCH. (c) Structural model of partially protonated Au102(p-MBA)44 (i); TEM image (ii), electron tomographic model (iii), and cartoon structural model (iv) of spherical capsids formed by Au102(p-MBA)44; TEM image of hexagonal close packed (HCP) layered architectures formed by Au102(p-MBA)44 (v); the arrows in (i) indicate the orientations of p-MBA ligands; the insets of (v) are the high resolution TEM image (top panel) and packing model (bottom panel) of HCP layered architectures; reproduced with permission from ref. 128 and 189. Copyright 2016 and 2017, respectively, Wiley-VCH.
