Ultraviolet absorption spectra of CeO2 nano-particles

S. Tsunekawa, R. Sivamohan, T. Ohsuna, A. Kasuya, H. Takahashi, K. Tohji

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Toluene suspensions containing surfactant coated CeO2 (ceria) nano-particles of narrow size distributions (with mean deviation less than 20%) in the 1.8-3.8 nm diameter range are obtained from an original ceria aqueous sol having particle sizes extending over a wide range, by ultrafiltration and successive microemulsifications. These suspensions show clear blue shifts in ultraviolet absorption spectra. Two possibilities are presented in order to explain the size effect. A model for size fractionation by surfactants is proposed.

Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalMaterials Science Forum
Volume315-317
Publication statusPublished - 1999 Jan 1

Keywords

  • Absorption Edge
  • Blue Shift
  • Ceria
  • Gel-Sol Process
  • Microemulsion
  • Monodispersion
  • Nano-Particle
  • Size Effect
  • Size Fractionation
  • Surfactant
  • Suspension
  • Ultra-Filtration
  • Ultraviolet Absorption

ASJC Scopus subject areas

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

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