Transmission electron microscopy study of Eu-doped Y2O 3 nanosheets and nanotubes

H. T. Sun, J. Chaudhuri, E. A. Kenik, H. Zhu, Y. Ma

Research output: Contribution to journalArticle

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Abstract

A hydrothermal method was used to synthesize high-purity Eu-doped Y 2O3 nanosheets and nanotubes with an approximate molar ratio of (0.1):(1.0) for Eu:Y. High-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy analysis and synchrotron X-ray diffraction were used to characterize these nanomaterials. A body-centered cubic structure was confirmed for the nanotubes. The lattice parameter of Eu-doped Y 2O3 nanotubes were 0.12% larger as compared to that of pure Y2O3 which was attributed to the larger ionic radius of Eu3+ (0.947 Å) than that of Y3+ (0.900 Å). The nanosheets had a similar structure. Nanosheets of approximate dimensions 600 to 800 nm length and width were obtained using a slightly lower pH value, and they were highly textured. The high resolution transmission electron microscopy images showed that the nanotubes are fully crystalline. The nanotubes were typically 1.5-3 μm in length and 50-200 nm in diameter. Using a pH value of approximately 10, stable nanotubes were obtained. It is anticipated that nanosheets might have rolled to form more stable nanotubes.

Original languageEnglish
Pages (from-to)314-318
Number of pages5
JournalNanoscience and Nanotechnology Letters
Volume3
Issue number3
DOIs
StatePublished - Jun 2011

Keywords

  • Energy Dispersive X-ray Spectroscopy Analysis
  • Eu-Doped YO
  • High Resolution Transmission Electron Microscopy
  • Nanosheets
  • Nanotubes
  • X-ray Diffraction

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