Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Dispersion Characteristics of α-Fe2O3 Nanopowders Coated with Titanium Dioxide by Atomic Layer Deposition

  • Ok, Hae Ryul (Department of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Bo Kyung (Department of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Bae, Hye Jin (Department of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Kim, Hyug Jong (Department of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Choi, Byung Ho (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
  • Received : 2016.12.14
  • Accepted : 2017.02.08
  • Published : 2017.03.31
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Abstract

A $TiO_2$ nanofilm was deposited on ${\alpha}-Fe_2O_3$ nanopowders using the atomic layer deposition method. The $TiO_2$ film was prepared at $300^{\circ}C$ using $Ti(N(CH_3)_2)_4$ and $H_2O$ as the precursor and reactant gas, respectively. The thickness and composition of the $TiO_2$ surface were characterized by TEM and EDS measurements. The TEM results showed that the growth rate of the film was about $0.12{\AA}/cycle$. The EDS and SAED analyses showed the presence of titanium oxide on the surface of the ${\alpha}-Fe_2O_3$ nanopowders, confirming the deposition of the $TiO_2$ nanofilm. The Zeta potential and sedimentation test results showed that the dispersibility of the coated nanopowders was higher than that of the uncoated nanopowders. This is attributed to the electrostatic repulsion between the $TiO_2$-coated layers on the surface of the ${\alpha}-Fe_2O_3$ nanopowders. The results revealed that the $TiO_2$-coated layers modified the surface characteristics of the ${\alpha}-Fe_2O_3$ nanopowders and improved their dispersibility.

Keywords

References

  1. D. S. Ling, N. H. Lee, and T. H. Hyeon, "Chemical Synthesis and Assembly of Uniformly Sized Iron Oxide Nanopowders for Medical Applications," Acc. Chem. Res., 48 1276-85 (2015). https://doi.org/10.1021/acs.accounts.5b00038
  2. N. H. Heo, G. R. Lee, D. H. Kang, J. I. Lee, and Y. J. Lee, "Silica Core/Magnetic Shell Particle Having Superparmagnetic Characters with Micron Scale And The Method of Thereof "; KR Patent 10-1064353 (September 5, 2011).
  3. M. Babincova and P. Babinec, "Magnetic Drug Delivery and Targeting: Principles and Applications," Biomed Pap Med FacUnivPalacky Olomouc Czech Repub., 153 [4] 243-50 (2009). https://doi.org/10.5507/bp.2009.042
  4. T. K. Indira and P. K. Lakshmi, "Magnetic Nanopowders-A Review," Int. J. Pharm. Sci. Nanotechnol., 3 [3] 1035-42 (2010).
  5. A. K. Gupta and M. Gupta, "Synthesis and Surface Engineering of Iron Oxide Nanopowders for Biomedical Applications," Biomaterials, 26 3995-4021 (2005). https://doi.org/10.1016/j.biomaterials.2004.10.012
  6. P. Tartaj, M. P. Morales, S. V. Verdaguer, T. G. Carreno, and C. J. Serna, "The Preparation of Magneticnanoparticles for Applications Inbiomedicine," J. Phys. D: Appl. Phys., 36 R182-97 (2003). https://doi.org/10.1088/0022-3727/36/13/202
  7. A. K. Gupta and S. Wells, "Surface-Modified Superparamagnetic Nanoparticles for Drug Delivery: Preparation, Characterization, and Cytotoxicity Studies," IEEE Trans Nanobioscience, 3 [1] 66-73 (2004). https://doi.org/10.1109/TNB.2003.820277
  8. K. I. Min, "Studies on the Stability of the Magnetic Nanopowders Coated with a Polymer in an Aqueous Solution," National Science Musium-Science Fair Rept. No j05520092202, July 2009.
  9. J. Zhou, L. Meng, Q. Lu, J. Fu, and X. Huang, "Superparamagnetic Submicro-Megranates: $Fe_3O_4$ Nanopowders Coated with Highly Cross-Linked Organic/Inorganic Hybrids," Chem. Commun., [42] 6370-72 (2009).
  10. S. M. Lee, S. J. Kim, H. Guo, and I. G. Kang, "Fabrication of Magnetite Nanopowders Immobilized with Dextran and Gelatin for Biomedical Application (in Korean)," Biomater. Res., 12 [1] 19-23 (2008).
  11. C. Cannas, D. Gatteschi, a. Musinu, G. Piccaluga, and C. Sangregorio, "Structural and Magnetic Properties of $Fe_2O_3$ Nanopowders Dispersed over a Silica Matrix," J. Phys. Chem. B, 102 [40] 7721-26 (1998). https://doi.org/10.1021/jp981355w
  12. Y. S. Han, S. M. Yoon, and D. K. Kim, "Synthesis of Monodispersed and Spherical $SiO_2$-Coated $Fe_2O_3$ Nanoparticle," Bull. Korean Chem. Soc., 21 [12] 1193-98 (2000).
  13. B. H. Ann, "Synthesis of Monodispersed Magnetic Polymer Particle (in Korean)", J. Korean Ind. Eng. Chem., 19 [3] 316- 21 (2008).
  14. H. J. Kim, H. G. Kim, I. G. Kang, and B. H. Choi, "Atomic Layer Deposition of MgO Nanofilms on $BaMgAl_{10}O_{17}:Eu^{2+}$ Blue Phosphors," J. Adv. Phys. Chem., 2011 1-4 (2011).
  15. S. Y. Park and J. S. Woo, "Nano-Particle Size Measurement Method Using a Zeta Potential (in Korean)," Ceramist, 5 [3] 44-53 (2002).

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