Photochemical strategies for the seed-mediated growth of gold and gold-silver nanoparticles
| Autor: | Katherine L. McGilvray, Carlos J. Bueno-Alejo, Chiara Fasciani, Rachel Schwartz-Narbonne, Juan C. Scaiano |
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| Rok vydání: | 2012 |
| Předmět: |
Nanostructure
Materials science Silver Photochemistry Shell (structure) Metal Nanoparticles Nanotechnology Surfaces and Interfaces Hydrogen Peroxide Condensed Matter Physics Silver nanoparticle Nanomaterials Metal Colloidal gold visual_art Electrochemistry visual_art.visual_art_medium Surface modification General Materials Science Seed mediated Gold Spectroscopy |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 28(46) |
| ISSN: | 1520-5827 |
| Popis: | Gold nanoparticles (AuNP) can be used as seeds for the synthesis of larger AuNP of controllable size with narrow size distribution by photochemical reduction of additional Au(III) using water-soluble benzoins or H(2)O(2) as sources of reducing radicals. Further, beyond simply enlarging the AuNP, it is possible to add a shell of another metal, such as silver, leading to Au/Ag core-shell structures with controllable dimensions for both core and shell. This strategy illustrates the fine spatial and temporal control achievable using clean photochemical techniques without the addition of hard surface ligands often necessary to control the size and structure of gold-silver nanostructures. The mild nature of the surface coverage makes these nanomaterials ideal for further surface modification. |
| Databáze: | OpenAIRE |
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