Nanoscale stabilization of new phases in the PbTe-Sb2Te 3 System

PbmSb2 nTem +3 n nanocrystals

Ronald B. Soriano, Indika U. Arachchige, Christos D. Malliakas, Jinsong Wu, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A series of novel rock-salt-type PbmSb2nTe m+3n nanocrystals (m = 2, 3, 4, 6, 8, and 10; n = 1 and 2) were successfully prepared using a colloidal synthesis route. These materials are stable only on the nanoscale and have no bulk analogues. Elemental compositions were determined using scanning transmission electron microscopy/energy- dispersive X-ray spectroscopy (STEM/EDS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The nanocrystals exhibit well-defined band energies in the mid-IR region that are nearly independent of their atomic compositions. PbmSb2nTem+3n nanocrystals behave as metastable homogeneous solid solutions at room temperature and tend to phase separate into the respective binary PbTe + Sb2Te3 at 300 C. Furthermore, pair distribution function (PDF) analysis suggests that the local structure of these PbmSb2nTem+3n nanocrystals is distorted with respect to the rock-salt structure.

Original languageEnglish
Pages (from-to)768-774
Number of pages7
JournalJournal of the American Chemical Society
Volume135
Issue number2
DOIs
Publication statusPublished - Jan 16 2013

Fingerprint

Nanoparticles
Nanocrystals
Stabilization
Salts
Rocks
X-Ray Emission Spectrometry
Atomic emission spectroscopy
Atomic Spectrophotometry
Scanning Transmission Electron Microscopy
Inductively coupled plasma
Chemical analysis
Band structure
Distribution functions
Solid solutions
Transmission electron microscopy
Scanning electron microscopy
Temperature

ASJC Scopus subject areas

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

Cite this

Nanoscale stabilization of new phases in the PbTe-Sb2Te 3 System : PbmSb2 nTem +3 n nanocrystals. / Soriano, Ronald B.; Arachchige, Indika U.; Malliakas, Christos D.; Wu, Jinsong; Kanatzidis, Mercouri G.

In: Journal of the American Chemical Society, Vol. 135, No. 2, 16.01.2013, p. 768-774.

Research output: Contribution to journalArticle

Soriano, Ronald B. ; Arachchige, Indika U. ; Malliakas, Christos D. ; Wu, Jinsong ; Kanatzidis, Mercouri G. / Nanoscale stabilization of new phases in the PbTe-Sb2Te 3 System : PbmSb2 nTem +3 n nanocrystals. In: Journal of the American Chemical Society. 2013 ; Vol. 135, No. 2. pp. 768-774.
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