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Formation of II-VI nanocrystals in polymeric matrix: Thermolytic synthesis and structural characterization

TitleFormation of II-VI nanocrystals in polymeric matrix: Thermolytic synthesis and structural characterization
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2005
AuthorsAntolini, F., Di Luccio Tiziana, Re Marilena, and Tapfer Leander
JournalCrystal Research and Technology
Volume40
Pagination948-954
ISSN02321300
KeywordsCadmium sulfide, Characterization, Crystalline materials, Inorganic-organic nanocomposites, Microstructure, Monocrystals, Nanostructured materials, Organic polymers, Semiconductor nanoparticles, Synthesis (chemical), Thermoanalysis, Thermolytic synthesis, Transmission electron microscopy, X ray diffraction, Zinc sulfide
Abstract

In this work we report on the growth of CdS and ZnS semiconductor nanocrystals embedded in a polymeric matrix (polystyrene) by synthesizing a metal thiolate precursor and its subsequent thermolysis at about 300°C after dispersion in the polymer. The crystallinity, shape and size of the metal sulfide nanocrystals were investigated by x-ray diffraction and transmission electron microscopy. The microstructural analysis demonstrates that our synthesis procedure allows us to control the nanocrystal growth in order to form nanoparticles with diameter as small as Ø=2nm. In particular, XRD analysis reveals that only CdS and ZnS nanocrystals of zincblende structure are formed. TEM images show that the metal sulfide nanocrystals are monocrystals of spherical shape and the size dispersion is <20%. Our experiments indicate that the nanocrystal capping agent is performed by the sulfur atoms at the surface of the nanoparticle bound to alkyl chain of the thiolate. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-27744463001&doi=10.1002%2fcrat.200410465&partnerID=40&md5=4f1f178a735518251cd407c80680e2f6
DOI10.1002/crat.200410465
Citation KeyAntolini2005948