Nano-Silver Mediated Polymerization of Pyrrole: Synthesis and Gas Sensing Properties of Polypyrrole (PPy)/Ag Nano-Composite

Kate, Kunal H.; Damkale, Shubhangi R.; Khanna, Pawan K.; Jain, G. H.

doi:10.1166/jnn.2011.4708

Cited by 51 publications

(34 citation statements)

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“…The room temperature conductivity of PPy-Ag composite nanoparticles has been reported to be 4.9 × 10 −2 Ω −1 m −1 [12]. PPy-Ag composites exhibited a good ammonia gas sensing [13]. Silver nanoparticles coated with PPy showed improved stability and functionality and measured enhanced conductivity [14].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Praveenkumar

Sankarappa

Ashwajeet

et al. 2015

Journal of Polymers

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Polypyrrole and silver nanoparticles have been synthesized at 277 K by chemical route. Nanoparticles of polypyrrole-silver (PPy-Ag) composites were prepared by mixing polypyrrole and silver nanoparticles in different weight percentages. Dielectric properties as a function of temperature in the range from 300 K to 550 K and frequency in the range from 50 Hz to 1 MHz have been measured. Dielectric constant decreased with increase in frequency and temperature. Dielectric loss decreased with increase in frequency and increased with increase in temperature. Using dielectric data AC conductivity has been determined. Conductivity was found to be in the order of 10 −3 (Ω −1 m −1 ) and it increased with increase in temperature. Temperature variation of conductivity data has been analyzed in the light of Mott's polaron hopping model. Activation energy for conduction has been determined. Activation energy was determined to be in the order of meV and it has increased with increase in frequency and Ag nanoparticles content. This is the first time that PPy-Ag nanocomposites have been investigated for dielectric properties and AC conductivity and data analyzed thoroughly.

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Section: Introductionmentioning

confidence: 99%

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Praveenkumar

Sankarappa

Ashwajeet

et al. 2015

Journal of Polymers

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“…The PECT-3 sensor showed a quick response and a fast recovery time to NH 3 gas. The response is considerably better than the one that was reported as 30 s in [28] and 32 s in [29] where the NH 3 gas sensors were made from Ag/PEDOT:PSS and Ag/polypyrrole nano-composites, respectively.…”

Section: Resultsmentioning

confidence: 62%

Optical and NH<sub>3</sub> Gas Sensing Properties of Hole-Transport Layers Based on PEDOT: PSS Incorporated with Nano-TiO<sub>2</sub>

Long¹,

Trung²,

Truong³

et al. 2017

MSA

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Poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) incorporated with nanocrystalline TiO 2 powder (PEDOT:PSS+nc-TiO 2 ) films were prepared by spin-coating technique. SEM surface morphology, UV-Vis spectra and NH 3 gas sensing of were studied. Results showed that the PEDOT:PSS+nc-TiO 2 film with a content of 9.0 wt% of TiO 2 is most suitable for both the hole transport layer and the NH 3 sensing. The responding time of the sensor made from this composite film reached a value as fast as 20 s. The rapid responsiveness to NH 3 gas was attributed to the efficient movement of holes as the major charge carriers in PEDOT:PSS+nc-TiO 2 composite films. Useful applications in organic electronic devices like light emitting diodes and gas thin film sensors can be envisaged.

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“…Electrochemical sensors composed of conducting polymers have many advantages, including low cost, ease of fabrication, tunable selectivity and flexible processing at room temperature [1][2][3]. Polypyrrole (PPy) is frequently used for sensor applications due to its broad π−electron conjugated conductivity and the alternating single and double bonds in its molecular structure [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improving the CO Sensing Properties of Ferrocene Modified Polypyrrole/Silicon Carbide Nanocomposite Films Synthesized by Electrochemical Deposition

Darwish¹,

Okur²

2017

AJN

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Abstract:In this study, SiC nanoparticles 40 nm in diameter were added to ferrocene-modified conducting polymer (FcPPy) films to improve the signal/noise ratio of a sensor. The increased porosity of the Fc-PPy/SiC nanocomposite film produces a larger active surface area with more active sites available for adsorption. Electrochemical deposition was used to fabricate nanocomposite films (PPy, Fc-PPy, PPy/SiC and Fc-PPy/SiC), on both QCM and interdigitated electrodes, to measure CO concentration. All nanocomposites were characterized using XRD, SEM and TEM. The grain sizes of the nanocomposites were measured to be between 100 nm and 500 nm after electrochemical polymerization coating. IDE chemiresistor sensors and QCM piezoelectric sensors were used to investigate the potential sensing mechanisms and adsorption-desorption kinetics of Fc-PPy/SiC nanocomposite films and to compare these films with bare PPy films. The sensitivity of Fc-PPy/SiC nanocomposite sensors to CO gas was significantly improved by the effects of the chemical activation of SiC catalyst nanoparticle additives and ferrocene modified conducting polymers.

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Nano-Silver Mediated Polymerization of Pyrrole: Synthesis and Gas Sensing Properties of Polypyrrole (PPy)/Ag Nano-Composite

Cited by 51 publications

References 0 publications

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Optical and NH<sub>3</sub> Gas Sensing Properties of Hole-Transport Layers Based on PEDOT: PSS Incorporated with Nano-TiO<sub>2</sub>

Improving the CO Sensing Properties of Ferrocene Modified Polypyrrole/Silicon Carbide Nanocomposite Films Synthesized by Electrochemical Deposition

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Nano-Silver Mediated Polymerization of Pyrrole: Synthesis and Gas Sensing Properties of Polypyrrole (PPy)/Ag Nano-Composite

Cited by 51 publications

References 0 publications

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Dielectric and AC Conductivity Studies in PPy-Ag Nanocomposites

Optical and NH&lt;sub&gt;3&lt;/sub&gt; Gas Sensing Properties of Hole-Transport Layers Based on PEDOT: PSS Incorporated with Nano-TiO&lt;sub&gt;2&lt;/sub&gt;

Improving the CO Sensing Properties of Ferrocene Modified Polypyrrole/Silicon Carbide Nanocomposite Films Synthesized by Electrochemical Deposition

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Optical and NH<sub>3</sub> Gas Sensing Properties of Hole-Transport Layers Based on PEDOT: PSS Incorporated with Nano-TiO<sub>2</sub>