Journal of Sol-Gel Science and Technology

, Volume 45, Issue 1, pp 35–41 | Cite as

Synthesis of spherical submicron-sized magnetite/silica nanocomposite particles

  • Y. Kobayashi
  • S. Saeki
  • M. Yoshida
  • D. Nagao
  • M. Konno
Original Paper


This paper describes a method for fabricating spherical submicron-sized silica particles that contained magnetite nanoparticles (magnetite/silica composite particles). The magnetite nanoparticles with a size of ca. 10 nm were prepared according to the Massart method, and were surface-modified with carboxyethylsilanetriol. The fabrication of magnetite/silica composite particles was performed in water/ethanol solution of tetraethoxyorthosilicate with ammonia catalyst in the presence of the surface-modified magnetite nanoparticles. The magnetite/silica composite particles with a size of ca. 100 nm were successfully prepared at 0.05 M TEOS, 15 M water, and 0.8 M ammonia with injection of the magnetite nanoparticle colloid at 2 min after the initiation of hydrolysis reaction of TEOS. Magnetite concentration in the composite particles could be raised to 17.3 wt.% by adjustment of the injected amount of the magnetite colloid, which brought about the saturation magnetization of 7.5 emu/g for the magnetite/silica composite particles.


Particle Magnetite Silica Composite Surface-modification Stöber method 


  1. 1.
    Cupta PK, Hung CT (1989) Life Sci 44:175CrossRefGoogle Scholar
  2. 2.
    Mitsuhashi K, Yoshizaki R, Okada H, Ohara T, Wada H (2003) Bunseki Kagaku 53:121 (in Japanese)CrossRefGoogle Scholar
  3. 3.
    Uhlen M (1989) Nature 340:733CrossRefGoogle Scholar
  4. 4.
    Kondo A, Kamura H, Higashitani K (1994) Appl Microbiol Biotechnol 41:99CrossRefGoogle Scholar
  5. 5.
    Haik Y, Pai V, Chen CJ (1999) J Magn Magn Mater 194:254CrossRefGoogle Scholar
  6. 6.
    Yang HH, Zhang SQ, Chen XL, Zhuang ZX, Xu JG, Wang XR (2004) Anal Chem 76:1316CrossRefGoogle Scholar
  7. 7.
    Santra S, Tapec R, Theodoropoulou N, Dobson J, Hebard A, Tan W (2001) Langmuir 17:2900CrossRefGoogle Scholar
  8. 8.
    Barnakov YA, Yu MH, Rosenzweig Z (2005) Langmuir 21:7524CrossRefGoogle Scholar
  9. 9.
    Liu X, Xing J, Guan Y, Shan G, Liu H (2004) Colloids Surf A 238:127CrossRefGoogle Scholar
  10. 10.
    Sun Y, Duan L, Guo Z, DuanMu Y, Ma M, Xu L, Zhang Y, Gu N (2005) J Magn Magn Mater 285:65CrossRefGoogle Scholar
  11. 11.
    Correa-Duarte MA, Giersig M, Kotov NA, Liz-Marzán LM (1998) Langmuir 14:6430CrossRefGoogle Scholar
  12. 12.
    Lu Y, Yin Y, Mayers BT, Xia Y (2002) Nano Lett 2:183CrossRefGoogle Scholar
  13. 13.
    Deng YH, Wang CC, Hu JH, Yang WL, Fu SK (2005) Colloids Surf A 262:87CrossRefGoogle Scholar
  14. 14.
    Gu S, Onishi J, Kobayashi Y, Nagao D, Konno M (2005) J Colloid Interface Sci 289:419CrossRefGoogle Scholar
  15. 15.
    Kobayashi Y, Yoshida M, Nagao D, Ando Y, Miyazaki T, Konno M (2007) Ceram Trans 198:135Google Scholar
  16. 16.
    Nagao D, Osuzu H, Yamada A, Mine E, Kobayashi Y, Konno M (2004) J Colloid Interface Sci 279:143CrossRefGoogle Scholar
  17. 17.
    Massart R (1981) IEEE Trans Magn 17:1247CrossRefGoogle Scholar
  18. 18.
    Shimoiizaka J, Nakatsuka K, Chubachi R, Sato Y (1976) Nihon Kagakukaishi 1:6 (in Japanese)Google Scholar
  19. 19.
    Wang Q, Wei Q, Gu H (2003) J Chem Eng Jpn 36:1227CrossRefGoogle Scholar
  20. 20.
    Harris LA, Goff JD, Carmichael AY, Riffle JS, Harburn JJ, St. Pierre TG, Saunders M (2003) Chem Mater 15:1367CrossRefGoogle Scholar
  21. 21.
    Mine E, Konno M (2001) J Chem Eng Jpn 34:545CrossRefGoogle Scholar
  22. 22.
    Xu H, Tong N, Cui L, Lu Y, Gu H (2007) J Magn Magn Mater 311:125CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Y. Kobayashi
    • 1
    • 2
  • S. Saeki
    • 1
    • 3
  • M. Yoshida
    • 1
  • D. Nagao
    • 1
  • M. Konno
    • 1
  1. 1.Department of Chemical Engineering, Graduate School of EngineeringTohoku UniversityAoba-ku, SendaiJapan
  2. 2.Department of Biomolecular Functional Engineering, College of EngineeringIbaraki UniversityHitachi, IbarakiJapan
  3. 3.Inorganic Materials LabToyota Central R&D Labs., Inc.Aichi-gun, AichiJapan

Personalised recommendations