Au55 microcrystals

Fig. 4.22. Colloidal crystals (a) from Fe-Pt nanocrystals (b) Au55 nanocrystals. A schematic illustration of a AU55 microcrystal along with the corresponding small angle X-ray diffraction pattern is shown alongside (reproduced with permission from [151] and [152]).

Figure 4.9 TEM image of an AU55 microcrystal with a skin of C4-SH dendrimer molecules.

Figure 4.10 Magnified TEM image of an AU55 microcrystal and crystallographic data from SAXRD and WAXRD studies. The hid values 111 and 110 are reduced by 5% due to the size-determined contraction of Au—Au distances in small particles.

Figure 3.6 Synthesis of [Au55(PPh3)32CI6] and and HRTEM micrographs of microcrystals of the Au55 cluster obtained from concentrated CH2CI2 solutions. Reproduced from reference [47] by permission of The Royal Society of Chemistry.

In contrast to the microcrystals formed of Au55(PPh3)i2Cl6, which have been intensively investigated with respect to their electronic characteristics, the 3-D assemblies ofbare AU55 clusters have notyetbeen subjected to physical investigations. 

---