Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites
In this work, chemical oxidation was used to polymerize conjugated polymer "Polypyrrole" at room temperature Graphene nanoparticles were added by in situ-polymerization to get (PPY-GN) nano. Optical and Electrical properties were studied for the nanocomposites. optical properties of the n...
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| Format: | Article |
| Language: | English |
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University of Baghdad
2021-12-01
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| Series: | Iraqi Journal of Physics |
| Subjects: | |
| Online Access: | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/652 |
| _version_ | 1811154825982771200 |
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| author | Fatima Mikdad Ahmed Salma M. Hassan |
| author_facet | Fatima Mikdad Ahmed Salma M. Hassan |
| author_sort | Fatima Mikdad Ahmed |
| collection | DOAJ |
| description |
In this work, chemical oxidation was used to polymerize conjugated polymer "Polypyrrole" at room temperature Graphene nanoparticles were added by in situ-polymerization to get (PPY-GN) nano. Optical and Electrical properties were studied for the nanocomposites. optical properties of the nanocomposites were studied by UV-Vis spectroscopy at wavelength range (200 -800 nm). The result showed optical absorption spectra were normally determined and the result showed that the maximum absorbance wave length at 280nm and 590nm. The optical energy gap has been evaluated by direct transition and the value has decreased from (2.1 eV for pure PPy) to (1.3 eV for 5 %wt. of GN). The optical constants such as the band tail width ΔE was evaluated, the value of ΔE for pure PPy was (0.0949eV) while for 5 wt. % of GN it was (0.5156 eV), It has been observed that the Urbach tail for pure PPy was smaller than that for PPy/GN nanocomposites and it increase as GN concentration increases. The A.C electrical conductivity at range of frequency (103Hz-106Hz) was increased by increasing the frequency and GN concentration about four order of magnitude. The s value was about (0.653-0.962) which means that the mechanism of conductivity is correlated hopping mechanism (C. H. P.). The dielectric constant and dielectric lose were determined and found to decrease with increasing frequency.
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| first_indexed | 2024-04-10T04:22:35Z |
| format | Article |
| id | doaj.art-36106af564f24451b346e3f3b2b68614 |
| institution | Directory Open Access Journal |
| issn | 2070-4003 2664-5548 |
| language | English |
| last_indexed | 2024-04-10T04:22:35Z |
| publishDate | 2021-12-01 |
| publisher | University of Baghdad |
| record_format | Article |
| series | Iraqi Journal of Physics |
| spelling | doaj.art-36106af564f24451b346e3f3b2b686142023-03-10T20:48:41ZengUniversity of BaghdadIraqi Journal of Physics2070-40032664-55482021-12-01195110.30723/ijp.v19i51.652Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) NanocompositesFatima Mikdad Ahmed0Salma M. Hassan1Department of Physics, College of Science, University of BaghdadDepartment of Physics, College of Science, University of Baghdad In this work, chemical oxidation was used to polymerize conjugated polymer "Polypyrrole" at room temperature Graphene nanoparticles were added by in situ-polymerization to get (PPY-GN) nano. Optical and Electrical properties were studied for the nanocomposites. optical properties of the nanocomposites were studied by UV-Vis spectroscopy at wavelength range (200 -800 nm). The result showed optical absorption spectra were normally determined and the result showed that the maximum absorbance wave length at 280nm and 590nm. The optical energy gap has been evaluated by direct transition and the value has decreased from (2.1 eV for pure PPy) to (1.3 eV for 5 %wt. of GN). The optical constants such as the band tail width ΔE was evaluated, the value of ΔE for pure PPy was (0.0949eV) while for 5 wt. % of GN it was (0.5156 eV), It has been observed that the Urbach tail for pure PPy was smaller than that for PPy/GN nanocomposites and it increase as GN concentration increases. The A.C electrical conductivity at range of frequency (103Hz-106Hz) was increased by increasing the frequency and GN concentration about four order of magnitude. The s value was about (0.653-0.962) which means that the mechanism of conductivity is correlated hopping mechanism (C. H. P.). The dielectric constant and dielectric lose were determined and found to decrease with increasing frequency. https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/652Optical propertiespolypyrrolegrapheneA.Cin situ polymerization |
| spellingShingle | Fatima Mikdad Ahmed Salma M. Hassan Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites Iraqi Journal of Physics Optical properties polypyrrole graphene A.C in situ polymerization |
| title | Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites |
| title_full | Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites |
| title_fullStr | Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites |
| title_full_unstemmed | Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites |
| title_short | Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites |
| title_sort | optical and a c electrical properties for polypyrrole and polypyrrole graphene ppy gn nanocomposites |
| topic | Optical properties polypyrrole graphene A.C in situ polymerization |
| url | https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/652 |
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