5 nm

5 nm

Figure 16. Computer simulation consisting of seven shells, 1415 atoms (top) and electron micrograph (bottom) of a Cu icosahedron viewed nearly along the 5-fold axis.

and 2-fold orientation. The particle in the 5-fold orientation shows a typical ring structure. The orientation of the experimental image is not exactly along the 5-fold axis. The PS for the 3-fold orientation shows a typical 3-fold splitting of the 111 reflections.

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