Crystal of semiconducting quantum dots built on covalently bonded T5 [In28Cd6S54]-12: The largest supertetrahedral cluster in solid state

Weiping Su, Xiaoying Huang, Jing Li, Huaxiang Fu

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Periodic array of nanoparticles is essential for practical applications in optical devices. Periodic dot arrays often exhibit very interesting collective phenomenon. We report a periodic crystal of InCdS pseudo-T5 nanocluster, the largest supertetrahedral cluster found thus far in solid state. Each InCdS cluster behaves like a nanoparticle with the same size. Unlike the array of colloidal dots in which the dot-dot separation is large (∼5 nm), the neighboring T5 clusters in [In28Cd6S54]·[(CH3)4N]12[(HSCH2COOH)2]3.5 crystal form a natural point contact by sharing covalently bonded S atoms. Both experimental and theoretical studies show that this crystal is a semiconductor with a band gap of 3.0 eV.

Original languageEnglish
Pages (from-to)12944-12945
Number of pages2
JournalJournal of the American Chemical Society
Issue number44
Publication statusPublished - Nov 6 2002


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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