Crown ether-metal 'sandwiches' as linking mechanisms in assembled nanoparticle films
| Autor: | Rebecca R. Pompano, Kevin W. Kittredge, Michael C. Leopold, D. J. Tognarelli, Leslie M. Moatz, Phillip G. Wortley |
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| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Double layer (biology) Stereochemistry Surface plasmon Metals and Alloys Nanoparticle Ether Surfaces and Interfaces Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Absorbance Metal chemistry.chemical_compound chemistry visual_art Monolayer Materials Chemistry visual_art.visual_art_medium Crown ether |
| Zdroj: | Thin Solid Films. 510:311-319 |
| ISSN: | 0040-6090 |
| Popis: | Crown ether ligands attached to monolayer-protected clusters (MPCs) were assembled as films and the linking mechanism between the crown ether–metal ion–crown ether bridges between nanoparticles was examined. Thicker films exhibited a red shift in the absorbance maximum for the surface plasmon band which was attributed to the increasing aggregation and cross linking within the film. Quantized double layer charging peaks suggest that film growth is selective toward a specific core size or exchange rate, either of which affect the number of potential linking ligands in the periphery of the MPCs. Multi-layer growth of films was only achieved with metal ions capable of coordinating within the cavity of the 15-crown-5 ether. Our exchange reaction parameters are in stark contrast to other types of MPC film assemblies. |
| Databáze: | OpenAIRE |
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