Novel nanocomposites based on polythiophene and zirconium dioxide

[Display omitted] •Crystallinity of polythiophene decreased with doping process.•Zirconium dioxide changed the surface morphology of PT significantly.•Doping process increased the glass transition temperature of polythiophene.•Charge transport mechanism of all samples is consistent with CBH model. T...

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Bibliographic Details
Published in:Materials research bulletin 2016-01, Vol.73, p.226-232
Main Author: Ozkazanc, Hatice
Format: Article
Language:English
Subjects:
ALTERNATING CURRENT
CALORIMETRY
CHARGE TRANSPORT
Chemical synthesis
Composites
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
Differential scanning calorimetry (DSC)
ELECTRIC CONDUCTIVITY
FOURIER TRANSFORMATION
INFRARED SPECTRA
MATERIALS SCIENCE
MONOCLINIC LATTICES
NANOCOMPOSITES
ORGANIC POLYMERS
SCANNING ELECTRON MICROSCOPY
TETRAGONAL LATTICES
THERMAL ANALYSIS
THIOPHENE
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
ZIRCONIUM
ZIRCONIUM IONS
ZIRCONIUM OXIDES
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Summary:[Display omitted] •Crystallinity of polythiophene decreased with doping process.•Zirconium dioxide changed the surface morphology of PT significantly.•Doping process increased the glass transition temperature of polythiophene.•Charge transport mechanism of all samples is consistent with CBH model. This paper reports charge transport mechanism of polythiophene (PT) and its nanocomposites having various weight of zirconium dioxide (ZrO2). Fourier transform infrared (FT-IR) spectral studies showed that the Zr ions mostly affected the CS bond of the polythiophene. X-ray diffraction (XRD) patterns indicated that ZrO2 powder was a mixture of monoclinic (64.62%) and tetragonal (35.38%) phase. XRD measurements revealed that crystallinity of PT decreased with increasing doping level. Significant morphological differences were observed in scanning electron microscopy (SEM) images of PT depending on the doping process. Thermal analysis carried out by differential scanning calorimetry (DSC) indicated that the doping processes increased glass transition temperature of PT. The alternating current (ac) conductivity mechanism analysis by universal power law indicated that charge transport mechanism of both PT and PT/ZrO2 nanocomposites was consistent with correlated barrier hopping (CBH) model. The doping process and frequency affected the hopping distance between the sites.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2015.09.009