Silver-Free Gold Nanocages with Near-Infrared Extinctions
| Autor: | Tai Chou Lee, T. Randall Lee, Andrew C. Jamison, Irene Rusakova, Amin Shakiba, Shreya Shah |
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| Rok vydání: | 2016 |
| Předmět: |
Pore size
Gold layer Nanostructure Materials science General Chemical Engineering Near-infrared spectroscopy chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences lcsh:Chemistry Template Nanocages lcsh:QD1-999 chemistry Galvanic cell 0210 nano-technology Palladium |
| Zdroj: | ACS Omega, Vol 1, Iss 3, Pp 456-463 (2016) ACS Omega |
| ISSN: | 2470-1343 |
| Popis: | This article reports the preparation of silver-free Au nanocages from cubic palladium templates. Pd nanocubes were subjected to galvanic replacement with Au3+ to produce Pd@Au nanocages having tunable dimensions (i.e., edge length, gold layer thickness, and hollow pore size), which allowed selectable positioning of the optical extinction maxima from the visible to the near infrared. These new nanocages circumvent the problems associated with previous Ag-derived gold alloy nanocages, which suffer from the toxicity of residual silver and the possible fragmentation of such alloyed nanostructures, thereby limiting their potential applications. In contrast, the present materials represent stable, nontoxic, tunable, and hollow plasmonic nanostructures. |
| Databáze: | OpenAIRE |
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