Energetics of CdSxSe1-x quantum dots in borosilicate glasses

Riham M. Morcos, Christoph Mitterbauer, Nigel Browning, Subhash Risbud, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The thermodynamics of CdSe quantum dots embedded in a glass matrix is of great interest because of the numerous applications as optical materials. In this study, the energetics and stability of CdSe quantum dots in a borosilicate glass matrix is investigated as a function of size using high-temperature oxide melt solution calorimetry. CdS0.1Se0.9 nanoparticles (1-40 nm) embedded in glass were analyzed by photoluminescence spectroscopy, electron microprobe, X-ray fluorescence, high-energy synchrotron X-ray diffraction, and (scanning) transmission electron microscopy using both electron energy loss and energy dispersive X-ray spectroscopy. As CdSe particles coarsen, their heat of formation becomes more exothermic. The interfacial energy of CdSe QDs embedded in a borosilicate glass, determined from the slope of enthalpy of drop solution versus calculated surface area, is 0.56 ± 0.01 J/m2.

Original languageEnglish (US)
Pages (from-to)2785-2795
Number of pages11
JournalJournal of Non-Crystalline Solids
Volume353
Issue number29
DOIs
StatePublished - Sep 15 2007
Externally publishedYes

Keywords

  • Borosilicates
  • Calorimetry
  • Nanoparticles, colloids and quantum structures
  • Oxide glasses
  • Quantum wells, wires and dots
  • Thermal porperties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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