SrAl4O7 : Eu2+nanocrystals: synthesis and fluorescence properties
| Autor: | K R Sophya Preethi, D. C. Trivedi, Radhakrishna I, M. Jayachandran, Chung-Hsin Lu, Jagannathan R, Jagannathan Thirumalai, N U Nayak, T S Natarajan |
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| Rok vydání: | 2004 |
| Předmět: |
Electronic structure
Photoluminescence Acoustics and Ultrasonics Activated carbon Relaxation processes Inorganic chemistry chemistry.chemical_element Photochemistry Fluorescence Degree of polymerization Europium Sol-gels Relaxation kinetics Doping (additives) Reaction kinetics Sol-gel polymer thermolysis Surface states Phosphorescence Nanostructured materials Condensed Matter Physics Strontium compounds Nanocrystalline material Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Nanocrystal Synthesis (chemical) Excited state Surface phenomena |
| Zdroj: | Journal of Physics D: Applied Physics. 37:2664-2669 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/37/19/009 |
| Popis: | Divalent europium doped strontium di-aluminate (SrAl4O 7 : Eu2+) nanocrystals have been synthesized using a facile sol-gel polymer thermolysis method. The photoluminescence characteristics of smaller particles (� ? 15 nm) show a significant difference with respect to their bulk counterpart. In this nanocrystalline system, the electronic structure of the Eu2+ excited state seems to undergo considerable modification induced by the surface states involved in slow relaxation kinetics that mimic phosphorescence like features. |
| Databáze: | OpenAIRE |
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