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Synthesis of CdSeS nanocrystals in coordinating and noncoordinating solvents: Solvent's role in evolution of the optical and structural properties

TitleSynthesis of CdSeS nanocrystals in coordinating and noncoordinating solvents: Solvent's role in evolution of the optical and structural properties
Publication TypeJournal Article
Year of Publication2007
AuthorsAl-Salim, N. I., Young A. G., Tilley R. D., McQuillan A. J., and Xia J. A.
JournalChemistry of Materials
Volume19
Pagination5185-5193
KeywordsAmines, Cadmium compounds, Hexadecylamine, infrared spectroscopy, Nanocrystals, Oleylamine, Oxides, Phosphine sulfide ligands, Photoluminescence, Solvents, Synthesis (chemical), trioctylphosphine oxide
Abstract CdSexSy nanocrystals were synthesized in eight solvents that have different coordinating properties, trioctylphosphine oxide, trioctylphosphine, triphenylphosphine, oleylamine, hexadecylamine, dioctylamine, trioctylamine, and 1-octadecene at 230-300°C. These nanocrystals exhibited high photoluminescence, which could be tuned over most of the visible region by changing the Se/S ratio or the solvent. The nanocrystals were characterized using UV-vis and IR spectroscopy, TEM, EDS, XRD, and NMR[?]. 31P NMR and IR studies provided vital information about the nanocrystal surface capping ligands, indicating that those prepared in noncoordinating solvents were stabilized in solution mainly by oleic acid while those prepared in the coordinating solvents were stabilized mainly by solvent, phosphine and phosphine sulfide ligands, and some oleic acid. The hexagonal or cubic phase of these nanocrystals can be selectively prepared at temperatures as high as 300°C by choosing the appropriate solvent. © 2007 American Chemical Society.
URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-35548993733&partnerID=40&md5=e993015d5e6021530ebb3f934525b9b9
DOI10.1021/cm070818k

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