Size as a Parameter to Stabilize New Phases: Rock Salt Phases of PbmSb2nSem+3n

Ronald B. Soriano, Jinsong Wu, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A series of PbmSb2nSem+3n nanocrystals (m = 2, 4, 6 and 8; n = 1) are demonstrated that exist only as a distinct phase on the nanoscale. The nanocrystals aggregates are new compounds adopting the cubic NaCl-type structure. These materials form aggregates comprised of nanocrystallites that are attached at a preferred orientation. Elemental compositions were studied using the complementary techniques of scanning transmission electron microscopy/energy dispersive X-ray spectroscopy and inductively coupled plasma-atomic emission spectroscopy. The new ternary nanocrystal aggregates are moderately monodisperse and exhibit well-defined band gap energies in the mid-IR region. The PbmSb2nSem+3n nanomaterials behave as homogeneous solid solutions with lattice parameter trending as a function of Sb incorporation at room temperature and tend to phase separate into PbSe and Sb2Se3 at 400 °C. (Figure Presented).

Original languageEnglish
Pages (from-to)9937-9942
Number of pages6
JournalJournal of the American Chemical Society
Volume137
Issue number31
DOIs
Publication statusPublished - Aug 12 2015

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ASJC Scopus subject areas

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

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