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Role of N-methyl-2-pyrrolidone for preparation of Fe3O4@SiO2 controlled the shell thickness

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Abstract

We developed a simple and novel approach for the synthesis of Fe3O4@SiO2 nanoparticles with controlled shell thickness, and studied the mechanism. The introduction of N-methyl-2-pyrrolidone (NMP) led to trapping of monomer nuclei in single shell and controlled the shell thickness. Fe3O4@SiO2 controlled the shell thickness, showing a high magnetization value (64.47 emu/g). Our results reveal the role and change in the chemical structure of NMP during the core-shell synthesis process. NMP decomposed to 4-aminobutanoic acid in alkaline condition and decreased the hydrolysis rate of the silica coating process.

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Acknowledgments

The work presented in this paper was supported by a National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning Science and Technology (2014R1A2A1A11050220).

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul, 133-791, South Korea

    Sung-Bok Wee, Tae-Gyun Kim, Gye-Seok An & Sung-Churl Choi

  2. Korea Nano Plus, Inc., 9-16 Macheon-ro 51gil, Songpa-gu, Seoul, South Korea

    Hyeon-Cheol Oh

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  1. Sung-Bok Wee
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  2. Hyeon-Cheol Oh
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  3. Tae-Gyun Kim
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Correspondence to Sung-Churl Choi.

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Conflict of interest

Authors S.B. Wee, T.G. Kim, and G.S. An have received research grants from the National Research Foundation of Korea (NRF).

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Wee, SB., Oh, HC., Kim, TG. et al. Role of N-methyl-2-pyrrolidone for preparation of Fe3O4@SiO2 controlled the shell thickness. J Nanopart Res 19, 143 (2017). https://doi.org/10.1007/s11051-017-3813-y

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  • DOI: https://doi.org/10.1007/s11051-017-3813-y

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