Displacement Synthesis of Cu Shells Surrounding Co Nanoparticles
| Autor: | Elizabeth J. Podlaha, E. E. Doomes, Zhanhu Guo, Challa S. S. R. Kumar, Josef Hormes, Laurence L. Henry |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Inorganic chemistry Nanoparticle chemistry.chemical_element Condensed Matter Physics Copper Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Ammonium hydroxide Pulmonary surfactant chemistry Ferromagnetism Materials Chemistry Electrochemistry Absorption (chemistry) Cobalt oxide Tetrahydrofuran |
| Zdroj: | Journal of The Electrochemical Society. 152:D1 |
| ISSN: | 0013-4651 |
| Popis: | Copper shells were fabricated by a displacement method around Co nanoparticles (3.2 ′ 0.6 nm) at room temperature in a copper-citrate aqueous electrolyte. The nanoparticles were synthesized by a wet chemical approach using the surfactant sulfobetaine, dodecyldimethyl (3-sulfopropyl) ammonium hydroxide (98%) in tetrahydrofuran. X-ray absorption near-edge structure analysis confirmed that cobalt oxide was not present in the nanoparticles upon exposure to air, consistent with a shell formation. Additionally, the presence of the shell resulted in an increase of the blocking temperature of the core-shell nanoparticles, stabilizing the ferromagnetic behavior up to 235 K. |
| Databáze: | OpenAIRE |
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