Photoluminescence of CdSe and CdSe/CdO · nH2O core/shell nanoparticles prepared in aqueous solution

Xingping Zhou, Zhiyu Shao, Yoshio Kobayashi, Xiaqin Wang, Noriaki Ohuchi, Motohiro Taketa, Atsuo Kasuya

研究成果: Article査読

18 被引用数 (Scopus)


CdSe sols with different colors were prepared by simply mixing CdSO4 and NaSSeO3 solutions under [Cd2+]/[Se2-] ratios of 2.0-0.4 at room temperature. The nanoparticles, with average sizes of 1.8-3.6 nm, showed relatively narrow photoemission peaks at 522-556 nm. The strongest photoluminescence with a FWHM of 35 nm was obtained under [Cd2+]/[Se2-] ratio of 1.2. The possible mechanism for achieving the strongest photoluminescence was proposed. Photoluminescence of these particles was greatly increased by surface modification of cadmium (II) hydrous oxide. The photoluminescence of these core-shell particles was kept constant in the pH range of 8.0-10.0, but dramatically decreased with an obvious blue-shifted peak while the pH was lower than 8.0. In addition, the photochemical oxidation of CdSe nanoparticles was markedly inhibited after they were modified with cadmium hydrous oxide.

ジャーナルOptical Materials
出版ステータスPublished - 2007 4月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • コンピュータ サイエンス(全般)
  • 原子分子物理学および光学
  • 分光学
  • 物理化学および理論化学
  • 有機化学
  • 無機化学
  • 電子工学および電気工学


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