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- Title
Low temperature double transition charge transport mechanism in co-doped polyaniline nanocomposites.
- Authors
Ruchi; Gupta, Vivek; Goyal, Sneh Lata; Ranjeet
- Abstract
In this study, low temperature electrical conductivity of pristine polyaniline and polyaniline/activated charcoal nanocomposites with four different loading concentrations of activated charcoal (2, 4, 6, and 8 wt%) synthesized through chemical oxidative polymerization method is presented. Surface analysis of the prepared nanocomposites was done using Field emission scanning electron microscope. The energy band for pristine are found to be 2.68 eV whereas it is decreases up to 2.41 eV after introducing 8 wt% loading concentration of AC. The Pristine PANI sample contains the high value of electrical conductivity i.e. 32.34 S/cm which increases upto 168.87 S/cm with the 8 wt% loading of activated charcoal in PANI matrix which is also evident with the increase in AQ/AB ratio from 0.214 to 0.408 using FTIR. The Mott's VRH model was found to be in agreement to explain the conduction mechanism in these samples. The Debye temperature for one-dimensional to two-dimensional hopping are found to be ~ 15, 18, 19, 22, 25 K whereas Debye temperature for two-dimensional to three-dimensional hopping are found to be ~ 28, 34, 36, 44, 46 for S0, S1, S2, S3, S4 samples, respectively. The enhancement in density of states from 3.05 × 1019 to 30.99 × 1019 eV−1 cm−3 and decrease in hopping distance from 341.59 to 191.38 nm in high tempreature region with the increase of loading concentrations of activated charcoal indicates the requirement of lesser hopping energy for charge transport.
- Subjects
POLYANILINES; FIELD emission electron microscopes; LOW temperatures; TRANSITION temperature; ACTIVATED carbon; DOPING agents (Chemistry)
- Publication
Applied Physics A: Materials Science & Processing, 2024, Vol 130, Issue 6, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-024-07608-2