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One-pot synthesis of magnetic nanoparticles assembled on polysiloxane rod and their response to magnetic field

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Abstract

Rod-like assembled magnetite (Fe3O4) nanoparticles (NPs) were successfully synthesized in a one-pot process using a polysiloxane template derived from a dialkoxysilane. The assembly was constructed using the thiol-ene click reaction between thiol groups on the polysiloxane chain and allyl groups on Fe3O4 NPs. The thiol-containing polysiloxane chain and the allyl-containing Fe3O4 NPs were synthesized by the hydrolysis–condensation of 3-mercaptopropyl(dimethoxy)methylsilane and iron (III) allylacetylacetonate, respectively. Fe3O4 NPs of around 5 nm were uniformly dispersed on the siloxane rods and exhibited neither remanent magnetization nor coercivity. A fluid containing a dispersion of rod-like assembled Fe3O4 NPs showed yield stress even without the application of an external magnetic field, whereas spherical Fe3O4 NPs exhibited no yield stress. The rod-like assembled Fe3O4 NPs on anisotropic siloxane clearly exhibited typical magnetorheological behavior.

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Authors and Affiliations

  1. Division of Nanomaterials Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan

    Koichiro Hayashi, Wataru Sakamoto & Toshinobu Yogo

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  1. Koichiro Hayashi
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  2. Wataru Sakamoto
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  3. Toshinobu Yogo
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Correspondence to Toshinobu Yogo.

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Hayashi, K., Sakamoto, W. & Yogo, T. One-pot synthesis of magnetic nanoparticles assembled on polysiloxane rod and their response to magnetic field. Colloid Polym Sci 291, 2837–2842 (2013). https://doi.org/10.1007/s00396-013-3039-1

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  • DOI: https://doi.org/10.1007/s00396-013-3039-1

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