| Synthesis and Characterization of Yttrium-doped Core-Shell SiO2 Nanoparticles by Reverse Micelle and Sol-gel Processing |
| Jun-Seop Kim, Min-Cheol Chu1, Seong-Jai Cho1, Dong-Sik Bae |
School of Nano & Advanced Material Engineering, College of Engineering, Changwon National University
1Korea Research Institute of Standard and Science |
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| ABSTRACT |
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In this study, yttrium-doped $SiO_2$ nanoparticles are synthesized using a reverse micelle technique combined with metal alkoxide hydrolysis and condensation. Spherical Y-doped $SiO_2$ nanoparticles with a uniform size distribution are prepared using selfassembly molecules in conjunction with the hydrolysis and condensation of organometallic precursors. The water/surfactant molar ratio influenced the Y-doped $SiO_2$ particles distribution of the core-shell composite particles and the distribution of Y doped $SiO_2$ particles was broadened as the water to surfactant ratio increased. The particle size of Y increase linearly as the $Y(NO_3)_3$ solution concentration increased. The average size of the cluster was found to depend on the micelle size, the nature of the solvent, and the concentration of the reagent. The effects of synthesis parameters, such as the molar ratio of water to surfactant and the molar ratio of water to TEOS, are discussed. |
| Key words:
Yttrium-doped $SiO_2$ particles, Nanoparticles, Reverse micelle, Sol-Gel Processing |
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