The effect of polymer matrices in the in-situ cds formation under uv irradiation of precursor-polymer films

Despina Fragouli, Anna Maria Laera, Gianvito Caputo, Vincenzo Resta, Pier Paolo Pompa, Leander Tapfer, Roberto Cingolani, Athanassia Athanassiou

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13 Citations (Scopus)

Abstract

Polymer films embedding cadmium thiolate precursors have been irradiated with ultraviolet laser pulses resulting in the formation of cadmium sulfide crystalline nanoparticles through a macroscopically non-destructive procedure for the host matrix. Controlling the number of the incident laser pulses, the gradual increase of the size of the nanoparticles is accomplished, and consequently the progressive change of the emission characteristics of the formed nanocomposites. The X-ray diffraction and transmission electron microscopy measurements were used for the full characterization of the nanoparticles. This study compares two polymer matrices, poly(methyl methacrylate) and a cyclic olefin copolymer, and reveals the importance of each one for the emission characteristics of the formed cadmium sulfide nanocrystals. It is found that the poly(methyl methacrylate) matrix contributes to the increase of the trap states on the surface of the formed nanocrystals, causing the broadening of their emission. On the other hand the cadmium sulfide nanoparticles, grown into the cyclic olefin copolymer matrix, exhibit narrower emission spectra. Copyright © 2010 American Scientific Publishers. All rights reserved.
Original languageEnglish
Pages (from-to)1267 - 1272
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume10
Issue number2
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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