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|
| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-181 |
| Subject |
Synthesis of Core@Middle-shell@Outer-shell Structured FePd@CaSiO3@SiO2 Nanospheres with Controllable Eccentricity of Metal Nancrystals in Solid-State Chemistry |
| Authors |
DONGKYOUNG YOON, In Su Lee*
Department of Chemistry, Pohang University of Science and Technology, Korea
|
| Abstract |
Synthesizing eccentric metal@SiO2 nanoparticles is not easy because of its unfavorable anisotropic structure. Though its difficulties to make, eccentric nanoparticles have unique physiochemical properties, such as optical, magnetic, catalytic property and so on. In previous work, we found that reduced FePd alloyed nanocrystal of SiO2 nanosphere migrated slowly outward silica medium. To further expand the utility of this FePd metal migration in SiO2 medium, we introduce CaSiO3 layer, on the interface between the FePd nanocrystals and SiO2 nanosphere by encapsulating Ca2+ into SiO2 nanosphere and following high temperature annealing. During the high temperature annealing, the Ca2+ doped SiO2 nanosphere was segregated to CaSiO3 and SiO2 double layer and FePd alloy migrated out of the CaSiO3 layer but, FePd alloy could not move out the silica medium even though the annealing time was increased, and it seem to be trapped in the interface of CaSiO3 and SiO2. Herein, We report for making an eccentric particle by controlling the thickness of the CaSiO3 layer. |
| E-mail |
yoondk@postech.ac.kr |
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121st General Meeting of the KCS