Fabrication of bifunctional core-shell Fe3O4 particles coated with ultrathin phosphor layer

Timur Sh Atabaev, Hyung Kook Kim, Yoon Hwae Hwang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Bifunctional monodispersed Fe3O4 particles coated with an ultrathin Y2O3:Tb3+ shell layer were fabricated using a facile urea-based homogeneous precipitation method. The obtained composite particles were characterized by powder X-ray diffraction, transmission electron microscopy (TEM), quantum design vibrating sample magnetometry, and photoluminescence (PL) spectroscopy. TEM revealed uniform spherical core-shell-structured composites ranging in size from 306 to 330 nm with a shell thickness of approximately 25 nm. PL spectroscopy confirmed that the synthesized composites displayed a strong eye-visible green light emission. Magnetic measurements indicated that the composite particles obtained also exhibited strong superparamagnetic behavior at room temperature. Therefore, the inner Fe3O4 core and outer Y2O3:Tb3+ shell layer endow the composites with both robust magnetic properties and strong eye-visible luminescent properties. These composite materials have potential use in magnetic targeting and bioseparation, simultaneously coupled with luminescent imaging.

Original languageEnglish
Article number357
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume8
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Bifunctional composite particles
  • Nanocomposites
  • Superparamagnetic behavior

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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