| Autor: |
Steiner, Anja Maria, Mayer, Martin, Schletz, Daniel, Wolf, Daniel, Formanek, Petr, Hübner, René, Dulle, Martin, Förster, Stephan, König, Tobias A. F., Fery, Andreas |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Chem. Mater. 2019, 31, 8, 2822-2827 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1021/acs.chemmater.8b05220 |
| Popis: |
Truly spherical silver nanoparticles are of great importance for fundamental studies including plasmonic applications, but the direct synthesis in aqueous media is not feasible. Using the commonly employed copper-based etching processes, isotropicplasmonic response can be achieved by etching well-defined silver nanocubes. Whilst spherical like shape is typically prevailing in such processes, we established that there is a preferential growth towards silver rhombicuboctahedra (AgRCOs), which is thethermodynamically most stable product of this synthesis. The rhombicuboctahedral morphology is further evidenced by comprehensive characterization with small-angle X-ray scattering in combination with TEM tomographyand high resolution TEM. Wealso elucidate the complete reaction mechanism based on UV-Vis kinetic studies, and the postulated mechanism can also be extended to all copper-based etching processes. |
| Databáze: |
arXiv |
| Externí odkaz: |
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