Optical, thermophysical and electrical characterization of PMMA (CdSe QDs) composite films

The concentration dependence of optical, thermophysical and electrical behavior, based on poly-methyl methacrylate filled with CdSe quantum dots (PMMA(CdSe)) have been investigated. The PMMA(CdSe) concentration was 0.001, 0.005, 0.01 and 0.05 wt.%. The composites were prepared in the form of films b...

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Bibliographic Details
Published in:Journal of polymer research 2013-02, Vol.20 (2), p.1-8, Article 76
Main Authors: Al-Hosiny, N. M., Abdallah, S., Moussa, M. A. A., Badawi, Ali
Format: Article
Language:English
Subjects:
Cadmium selenides
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Direct current
Doppler effect
Industrial Chemistry/Chemical Engineering
Intermetallics
Original Paper
Polymer Sciences
Polymethyl methacrylates
Resistivity
Thermal conductivity
Thermophysical
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Summary:The concentration dependence of optical, thermophysical and electrical behavior, based on poly-methyl methacrylate filled with CdSe quantum dots (PMMA(CdSe)) have been investigated. The PMMA(CdSe) concentration was 0.001, 0.005, 0.01 and 0.05 wt.%. The composites were prepared in the form of films by the solution casting technique. The optical properties of PMMA(CdSe) films have showed that, there is a red shift of the absorption and photoluminescence (PL) after the QDs were added into PMMA. The PL peak intensity of the composite was enhanced by ≈ 2.5 times compared to the CdSe QDs. The thermal conductivity (k) was obtained by measuring the thermal diffusivity (α) and thermal effusivity (e) using the photoacoustic (PA) technique. The composites exhibit ≈ 120 % improvement in k at 0.05 wt.% . Furthermore, the dc electrical conductivity measurements of pure and doped PMMA, showed that the obtained values were enhanced about four orders of magnitude for the highest concentration compared with pure PMMA at 500 0 C.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-013-0076-x