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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(01) [January 2012] >
| Title: | Temperature dependent studies of electric and dielectric properties of polythiophene based nano composite |
| Authors: | Tiwari, D C
Sen, Vikas
Sharma, Rishi |
| Keywords: | Dielectric constant
Carbon nanotubes
Polythiophene
ac conductivity
Relaxation time |
| Issue Date: | Jan-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The fabrication,
characterization, electric, dielectric and ac conductivity measurement
of polythiophene and carbon nanotube (CNT) composite are described. The
polythiophene (PTh) and polythiophene/ multiwalled carbon nanotube (PTh/MWCNT)
composite are prepared chemically by oxidative polymerization of thiophene(Th).
The formation of PTh and incorporation of CNTs into PTh are confirmed by
Fourier Transform – Infrared spectroscopy (FT-IR) and Energy Dispersive X-Ray
analysis (EDAX) analysis. Scanning Electron Microscopic (SEM) analysis revealed
the formation of polymer/CNT composite. SEM image of PTh shows a leaf like
structure and image of PTh/MWCNT shows the incorporation of MWCNT into the PTh flakes.
Atomic force microscopic (AFM) analysis shows the morphology of PTH and PTh/MWCNT.
The structural features of Nanotube-Polymer association are observed by AFM
studies. The electrical behaviour of prepared samples has been studied by
measuring I-V characteristics at varying temperature. The dielectric
properties of these samples have been studied at low frequencies (150-700 kHz)
for varying temperature. The dielectric constant for PTh/MWCNT is found to be
higher than PTh for all temperature ranges. Finally,theac electrical
conductivity (σac) and dielectric relaxation time calculations have
been carried out by using the data available from dielectric measurements and
by employing a simple relationship. Conductivity shows a linear dependence on
temperature and is also higher for PTh/MWCNT. |
| Page(s): | 49-56 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(01) [January 2012]
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