TY - JOUR
T1 - Energetics of CdSxSe1-x quantum dots in borosilicate glasses
AU - Morcos, Riham M.
AU - Mitterbauer, Christoph
AU - Browning, Nigel
AU - Risbud, Subhash
AU - Navrotsky, Alexandra
N1 - Funding Information:
We thank Schott Glass Technologies for providing the un-struck doped glasses. We thank Dr. Sarah Roeske for the help with EMP and Dr. Joseph S. Hayden for XRF analysis. The authors acknowledge support of the National Center for Electron Microscopy and Advanced Light Source, Lawrence Berkeley Lab, which is supported by the US Department of Energy under Contract # DE-AC02-05CH11231. This work was supported by NSF NEAT IGERT grant DGE-9972741, NSF DMR-0444731 and EAR-0229332.
PY - 2007/9/15
Y1 - 2007/9/15
N2 - 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.
AB - 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.
KW - Borosilicates
KW - Calorimetry
KW - Nanoparticles, colloids and quantum structures
KW - Oxide glasses
KW - Quantum wells, wires and dots
KW - Thermal porperties
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U2 - 10.1016/j.jnoncrysol.2007.05.008
DO - 10.1016/j.jnoncrysol.2007.05.008
M3 - Article
AN - SCOPUS:34547668594
SN - 0022-3093
VL - 353
SP - 2785
EP - 2795
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 29
ER -