두께 조절이 가능한 코어셸 형태의 SiO2 coated CoFe2O4 구조
Thickness Control of Core Shell type Nano CoFe2O4@SiO2 Structure
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Homogenous silica-coated CoFe2O4 samples with controlled silica thickness were synthesized by the reverse microemulsion method. First, 7 nm size cobalt ferrite nanoparticles were prepared by thermal decomposition methods. Hydrophobic cobalt ferrites were coated with controlled SiO2 using polyoxyethylene(5)nonylphenylether (Igepal) as a surfactant, NH4OH and tetraethyl orthosilicate (TEOS). The well controlled thickness of the silica shell was found to depend on the reaction time and the amount of surfactant used during production. Thick shell was prepared by increasing reaction time and small amount of surfactant.
Abstract
Homogenous silica-coated CoFe2O4 samples with controlled silica thickness were synthesized by the reverse microemulsion method. First, 7 nm size cobalt ferrite nanoparticles were prepared by thermal decomposition methods. Hydrophobic cobalt ferrites were coated with controlled SiO2 using polyoxyethylene(5)nonylphenylether (Igepal) as a surfactant, NH4OH and tetraethyl orthosilicate (TEOS). The well controlled thickness of the silica shell was found to depend on the reaction time and the amount of surfactant used during production. Thick shell was prepared by increasing reaction time and small amount of surfactant.
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