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Structural characterization of CdS nanoparticles grown in polystyrene matrix by thermolytic synthesis

TitleStructural characterization of CdS nanoparticles grown in polystyrene matrix by thermolytic synthesis
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2005
AuthorsAntolini, F., Pentimalli Marzia, Di Luccio Tiziana, Terzi R., Schioppa M., Re Marilena, Mirenghi L., and Tapfer Leander
JournalMaterials Letters
KeywordsCadmium sulfide, Differential thermal analysis, Heat treatment, Metal sulfides, Nanostructured materials, Nuclear magnetic resonance, Polymers, Polystyrene matrix (PS), Polystyrenes, Semiconductor materials, Single crystals, Synthesis (chemical), Thermogravimetric analysis, Thermolytic synthesis, Transmission electron microscopy, X ray photoelectron spectroscopy

Cadmium sulfide nanoparticles embedded in a polystyrene matrix (CdS/PS) were successfully prepared by in situ thermolysis of a cadmium thiolate precursor dispersed in the polymer. The heat-induced formation of cadmium sulfide was studied by thermogravimetric analysis and differential thermal analysis, while the chemistry of the reaction forming the CdS/PS compound was investigated by nuclear magnetic resonance and X-ray photoelectron spectroscopy. The structural characterization was performed by X-ray diffraction and transmission electron microscopy. The CdS nanocrystals are single crystals of cubic phase (zincblende structure) of spherical shape. The average diameter of the nanocrystals embedded in the polystyrene matrix achieved by our synthesis process is as small as 2.5 ± 0.5 nm. Room temperature UV-VIS absorption spectra exhibit a shoulder at 412 nm that is consistent with the presence of CdS nanocrystals of Ø ≈ 2 nm. The role of the polymer on the nanoparticle growth was also discussed. © 2005 Elsevier B.V. All rights reserved.


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Citation KeyAntolini20053181