Electrical and humidity sensing properties of polyaniline/WO3 composites

Parvatikar, Narsimha; Jain, Shilpa; Khasim, Syed; Revansiddappa, M.; Bhoraskar, S. V.; Prasad, M. V. N. Ambika

doi:10.1016/j.snb.2005.06.057

Cited by 236 publications

(100 citation statements)

References 21 publications

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“…The magnitude of the conductivity is dependent on the number of charge carriers available and their mobility. It has been observed that mobility of charge carriers increases with the increase in temperature leading to the increase in conductivity similar to that reported for PANI/WO 3 and PANI/CeO 2 nanocomposites [22,23]. Another factor which also affects the electrical conductivity is the molecular alignment of the chains within the entire system.…”

Section: Temperature Dependence Of DC Electrical Conductivity Of the supporting

confidence: 76%

DC electrical conductivity and rate of ammonia vapour-sensing performance of synthetic polypyrrole–zirconium(IV) phosphate cation exchange nanocomposite

2017

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Electrically conductive polypyrrole-zirconium(IV) phosphate (PPy-ZrP) cation exchange nanocomposites have been synthesized for the first time by in situ chemical oxidative polymerization of pyrrole in the presence of zirconium(IV) phosphate (ZrP). Fourier Transform Infra-red spectroscopy (FTIR), field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, differential thermal analysis, derivative thermogravimetry and elemental analysis were used to characterize PPy-ZrP cation exchange nanocomposite. The composite showed good ion-exchange capacity (1.60 meq g -1 ), DC electrical conductivity (0.33 S cm -1 ) and isothermal stability in terms of DC electrical conductivity retention under ambient condition up to 100°C. PPy-ZrP cation exchangenanocomposite-based sensor was fabricated for the detection of ammonia vapours of aqueous ammonia. The resistivity of the nanocomposites increases on exposure to high-concentration ammonia vapours at room temperature (25°C). The rate of reaction for ammonia vapour-sensing on PPy-ZrP was observed as second order.

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Section: Temperature Dependence Of DC Electrical Conductivity Of the supporting

confidence: 76%

DC electrical conductivity and rate of ammonia vapour-sensing performance of synthetic polypyrrole–zirconium(IV) phosphate cation exchange nanocomposite

2017

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“…16 Successful preparation of conducting polymer as humidity sensor has been reported. 17 There are reports of strong dielectric responses in selected conjugated polymeric structures. For example, a polymer composite consisting of the polymer metal oxide nanocomposites shows good dielectric response as well as good stability.…”

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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The polyaniline/copper oxide (PANI/CuO) nanocomposite was prepared by mixing solutions of polyaniline and copper oxide nanoparticles in dimethyl sulfoxide (DMSO). The synthesized polymer nanocomposites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. The characteristic peaks in XRD and UVvisible spectra confirmed the presence of CuO in the polymer structure. SEM images indicated morphological changes in the composite matrix as compared to the pristine PANI. The DC conductivity measurements were performed using two-probe method for various temperatures. AC conductivity and dielectric response of the composites were investigated in the frequency range of 10 2 -10 6 Hz using LCR meter. Dielectric permittivity 0 ðwÞ and dielectric loss factor 00 ðwÞ were investigated. It was observed that 0 ðwÞ and 00 ðwÞ decrease with increase in frequency at all temperatures. At a particular frequency it is observed that both 0 ðwÞ and 00 ðwÞ increase with increase in temperature. It was also observed that AC conductivity increased with increase in frequency and temperature.

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“…Various composites of PANI with different fillers or dopants like MoO 3 , MnO 3 , WO 3 , TiO 2 , BF 3 , CNTS etc. have been synthesized, characterized and explored for various possible applications [5][6][7][8][9] . In the same direction some of the transition metals and their complexes containing polymers have also been prepared and studied 10 and are interesting systems under consideration in various fields such as organic electronics, where PANI/metal hetero junctions are employed for electrical transport and rectification…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Study of Effect of Irradiation on Electronic Properties of Polyaniline Composite with Metal Complex of Co (III)

Naqash

Majid

2015

Mat. Res.

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Electrical and humidity sensing properties of polyaniline/WO3 composites

Cited by 236 publications

References 21 publications

DC electrical conductivity and rate of ammonia vapour-sensing performance of synthetic polypyrrole–zirconium(IV) phosphate cation exchange nanocomposite

DC electrical conductivity and rate of ammonia vapour-sensing performance of synthetic polypyrrole–zirconium(IV) phosphate cation exchange nanocomposite

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Synthesis, Characterization and Study of Effect of Irradiation on Electronic Properties of Polyaniline Composite with Metal Complex of Co (III)

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