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Particle size, uniformity, and mesostructure control of magnetic core/mesoporous silica shell nanocomposite spheres

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Abstract

Well-structured and monodisperse nanocomposite spheres with a magnetic core/mesoporous silica shell structure (MCMS) were obtained. The effects on the structure and morphology of the MCMS spheres were investigated under various synthesis conditions, including reaction time, quantity of silicate sources of tetraethoxysilane (TEOS) and n-octadecyltrimethoxysilane (C18TMS), ratio of TEOS/C18TMS, and ratio of H2O/EtOH in the starting solution. The particle size of the MCMS spheres and pore diameter are tunable in a certain range with 100% yield. A synthesis mechanism of the mesoporous silica shell was proposed that proceeds via three main stages. The silica shell proved to be effective on protecting the cores from leaching out in acidic conditions.

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Authors and Affiliations

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People’s Republic of China

    Wenru Zhao, Jianlin Shi, Hangrong Chen & Lingxia Zhang

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  1. Wenru Zhao
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  2. Jianlin Shi
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  3. Hangrong Chen
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  4. Lingxia Zhang
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Correspondence to Jianlin Shi.

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Zhao, W., Shi, J., Chen, H. et al. Particle size, uniformity, and mesostructure control of magnetic core/mesoporous silica shell nanocomposite spheres. Journal of Materials Research 21, 3080–3089 (2006). https://doi.org/10.1557/jmr.2006.0381

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  • DOI: https://doi.org/10.1557/jmr.2006.0381

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