Aqueous phase synthesized CdSe nanoparticles with well-defined numbers of constituent atoms

Yeon Su Park, Andriy Dmytruk, Igor Dmitruk, Atsuo Kasuya, Yukihiro Okamoto, Noritada Kaji, Manabu Tokeshi, Yoshinobu Baba

研究成果: Contribution to journalArticle査読

56 被引用数 (Scopus)

抄録

We report aqueous phase synthesized semiconductor nanoparticles with well-defined numbers of constituent atoms. Aqueous phase synthesis provides many advantages over organic phase synthesis for producing such high-quality semiconductor nanoparticles. We synthesized CdSe nanoparticles with excellent colloidal and optical stabilities directly in aqueous solution at room temperature and then identified them as selectively grown (CdSe)33 and (CdSe)34 magic-sized clusters. These clusters displayed extremely sharp excitonic absorption and emission peaks because of their practically monodispersed size distribution. Their X-ray diffraction pattern and Raman spectral features were considerably different from the corresponding pattern and features for typical crystalline CdSe nanoparticles. Growth of our magic-sized clusters was very slow and proceeded via the formation of different sizes of progressively larger CdSe nanoparticle intermediates with time. Our results demonstrated that aqueous phase synthetic routes could be successfully adopted for producing high-quality semiconductor nanoparticles.

本文言語英語
ページ(範囲)18834-18840
ページ数7
ジャーナルJournal of Physical Chemistry C
114
44
DOI
出版ステータス出版済み - 11 11 2010
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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