Preparation and application of magnetic cobalt/SiO2 core/shell nanospheres |
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| Authors: | Mengshi XuRu Qiao Xiao Li ZhangYoung Soo Kang Liang-Chao Li |
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| Affiliation: | a College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Chinab Department of Chemistry, Sogang University, Seoul 121-742, South Koreac Department of Materials Engineering, Monash University, Clayton VIC, Australia |
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| Abstract: | Homogeneous SiO2-coated cobalt nanospheres with tunable silica shell thickness from 21.7 nm to 4.5 nm were synthesized by using modified Stöber method. These nanocomposites were used as source materials to prepare SiO2 semi-hollow and hollow nanospheres by partially and completely etching cobalt cores, respectively. A proposed formation mechanism of these Co/SiO2 nanospheres with a core/shell structure was presented in this paper, which is also important for the rational design and synthesis of other monodisperse core/shell nanoarchitectures with uniform size and shape. Furthermore, these Co/SiO2 nanospheres were also used as a substrate for the deposition of CdS nanocrystals to prepare magnetic luminescent Co/SiO2/CdS nanocomposites. |
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| Keywords: | Co/SiO2 nanospheres Magnetic materials Hollow spheres CdS Nanocomposites |
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