Mono-cadmium vs Mono-mercury Doping of Au25 Nanoclusters
2015
Yao, Chuanhao | Lin, Yue-jian | Yuan, Jinyun | Liao, Lingwen | Zhu, Min | Weng, Lin-hong | Yang, Jinlong | Wu, Zhikun
Controlling the dopant type, number, and position in doped metal nanoclusters (nanoparticles) is crucial but challenging. In the work described herein, we successfully achieved the mono-cadmium doping of Au₂₅ nanoclusters, and revealed using X-ray crystallography in combination with theoretical calculations that one of the inner-shell gold atoms of Au₂₅ was replaced by a Cd atom. The doping mode is distinctly different from that of mono-mercury doping, where one of the outer-shell Au atoms was replaced by a Hg atom. Au₂₄Cd is readily transformed to Au₂₄Hg, while the reverse (transformation from Au₂₄Hg to Au₂₄Cd) is forbidden under the investigated conditions.
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