Energetics of CdSxSe1−x quantum dots in borosilicate glasses |
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Authors: | Riham M Morcos Christoph Mitterbauer Subhash Risbud |
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Institution: | a Theromochemsitry Facility and NEAT ORU, University of California at Davis, Davis, CA 95616, USA b Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, USA |
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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. |
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Keywords: | 81 05 kf 81 07 ta 68 65 68 65 hb 61 46 df 78 67 bf |
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