Reconstructing the Surface of Gold Nanoclusters by Cadmium Doping
| Autor: | Giannis Mpourmpakis, Kelly J. Lambright, Jianbo Zhao, Soumitra Mokashi-Punekar, Qi Li, Kristin Kirschbaum, Michael G. Taylor, Tian-Yi Luo, Rongchao Jin, Nathaniel L. Rosi |
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| Rok vydání: | 2017 |
| Předmět: |
Cadmium
Doping chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Nanoclusters Bimetal Metal Crystallography Colloid and Surface Chemistry chemistry visual_art Atom visual_art.visual_art_medium Density functional theory 0210 nano-technology Surface reconstruction |
| Zdroj: | Journal of the American Chemical Society. 139:17779-17782 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.7b11491 |
| Popis: | Atomically precise metal nanoclusters with tailored surface structures are important for both fundamental studies and practical applications. The development of new methods for tailoring the surface structure in a controllable manner has long been sought. In this work, we report surface reconstruction induced by cadmium doping into the [Au23(SR)16]− (R = cyclohexyl) nanocluster, in which two neighboring surface Au atomic sites “coalesce” into one Cd atomic site and, accordingly, a new bimetal nanocluster, [Au19Cd2(SR)16]−, is produced. Interestingly, a Cd(S-Au-S)3 “paw-like” surface motif is observed for the first time in nanocluster structures. In such a motif, the Cd atom acts as a junction which connects three monomeric -S-Au-S- motifs. Density functional theory calculations are performed to understand the two unique Cd locations. Furthermore, we demonstrate different doping modes when the [Au23(SR)16]− nanocluster is doped with different metals (Cu, Ag), including (i) simple substitution and (ii) tota... |
| Databáze: | OpenAIRE |
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