Formation mechanism of monodispersed spherical core-shell ceria/polymer hybrid nanoparticles

Noriya Izu, Toshio Uchida, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Very unique core-shell ceria (cerium oxide)/polymer hybrid nanoparticles that have monodispersed spherical structures and are easily dispersed in water or alcohol without the need for a dispersant were reported recently. The formation mechanism of the unique nanoparticles, however, was not clear. In order to clarify the formation mechanism, these nanoparticles were prepared using a polyol method (reflux heating) under varied conditions of temperature, time, and concentration and molecular weight of added polymer (poly(vinylpyrrolidone)). The size of the resultant nanoparticles was strongly and complicatedly dependent on the set temperature used during reflux heating and the poly(vinylpyrrolidone) molecular weight. Furthermore, the size of the nanoparticles increased by a 2-step process as the reflux heating time increased. The IR spectral changes with increasing reflux time indicated the increase in the number of cross-linked polymers in the shell. From these results, the formation mechanism was discussed and proposed.

Original languageEnglish
Pages (from-to)1168-1176
Number of pages9
JournalMaterials Research Bulletin
Volume46
Issue number8
DOIs
Publication statusPublished - Aug 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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