Fabrication of a novel fluorescent material by conjugation of Q-dots with particles

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We prepared ZnS:Mn2+ nanocrystal-particle complexes and YAG:Ce3+ nanocrystal-particle complexes. In addition to the improved dispersion-stability, conjugation of Q-dots with particles enabled us to control the fluorescent properties. The fluorescent intensity increased with increasing the number of incorporated ZnS:Mn2+ nanocrystals and the intensity was also enhanced by aging after conjugation. Since YAG:Ce3+ nanocrystals have around 30nm in diameter, it was not so easy to assembly them into NAG particles. We could obtain YAG:Ce3+ nanocrystal-particle complexes by using negatively-charged NAGCOOH particles. This is because the electrostatic attraction works between the NAGCOOH particles and positively-charged YAG:Ce3+ nanocrystals. Although YAG:Ce 3+ nanocrystals were apt to aggregate, the obtained complexes were well dispersed even in an aqueous solution containing 100mM NaCl.

Original languageEnglish
Number of pages1
Publication statusPublished - 2006 Oct 19
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: 2006 May 242006 May 26


Other55th SPSJ Annual Meeting


  • Core-shell particle
  • Fluorescent
  • Nanocrystal
  • Q-dot

ASJC Scopus subject areas

  • Engineering(all)


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