Electrical conductivity and dielectric properties of sulfamic acid doped polyaniline

Ameen, Sadia; Ali, Vazid; Zulfequar, M.; Haq, M. Mazharul; Husain, M.

doi:10.1016/j.cap.2006.05.002

Cited by 50 publications

(28 citation statements)

References 22 publications

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“…S4a †). 40,41 Different proton-doping levels between the previous work 38 and this work of ours can cause changes in the dielectric function. 39 Through electrodynamic simulations, we found that the peak shift caused by the reversible proton doping of PANI is increased with increasing dent depths (Fig.…”

Section: Resultsmentioning

confidence: 80%

Switching plasmon coupling through the formation of dimers from polyaniline-coated gold nanospheres

et al. 2015

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Active modulation of the plasmon coupling in homodimers of polyaniline (PANI)-coated Au nanospheres is achieved by changing the proton-doping state of the PANI shell. Such a PANI-enabled modulation of the plasmon coupling in the dimers gives rise to remarkable spectral shifts, which show an exponential dependence on the interparticle gap distance. For the dimer with a 10 nm PANI shell thickness and a 0.5 nm gap distance, the shift of the stronger scattering peak in response to the active modulation reaches 231 nm. Electrodynamic simulations reveal that the shift of the dipolar bonding plasmon mode dominates the position variation of the stronger scattering peak for the dimers with different gap distances. Moreover, the quadrupolar bonding plasmon mode can be turned on and off by controlling the proton-doping state of the dimers with gap distances of less than ∼3 nm. These results are of high importance for fundamentally understanding the sensitivity of coupled plasmon resonance modes to the dielectric environment, as well as for designing active plasmonic devices with high modulation performances.

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Section: Resultsmentioning

confidence: 80%

Switching plasmon coupling through the formation of dimers from polyaniline-coated gold nanospheres

et al. 2015

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“…[3,9] Polyaniline (PAni) has received a great attention in recent years, being extensively studied due to its molecular structures, easiness of polymerization and doping, excellent physical chemical properties (as chemical stability of its conducting form), low cost and easiness of attainment of its monomer, characteristics that make it a very efficient RAM. [7,8,[11][12][13] Blends of polyaniline with thermoplastics constitute a very useful approach for the development of conducting materials with good processability and good mechanical properties. [14,15] In this study, we report the preparation by in situ polymerization of conducting composites based on polyaniline doped with DBSA and poly(styrene-b-styrenebutadiene-b-styrene) (STF) as supporting matrix.…”

Section: Introductionmentioning

confidence: 99%

Study of Microwave Absorbing Properties of Polyaniline/STF Conducting Composites Prepared by in Situ Polymerization

Schettini

Soares

2011

Macromolecular Symposia

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Summary: Conducting composites of polyaniline doped with dodecylbenzenesulfonic acid (PAni-DBSA) and poly(styrene-b-styrene-butadiene-b-styrene) (STF) as supporting matrix were prepared by in situ synthesis. The influence of composition and thickness on the electromagnetic properties and shielding effectiveness (SE) of the materials was evaluated using a microwave network analyzer and a standard rectangular waveguide from 8.2-12.4 GHz (X-band). It was found that the composition 49/51 exhibited the best SE and the higher values of reflected power (P R ), e 0 , e 00 and e Ã . The compositions 12/88 and 17/83 presented the higher values of transmitted power (P T ) and absorbed power (P A ), respectively. The composition 25/75 presented the higher value of tan d. The thickness of 5Â showed the best SE and higher value of P R . The higher value of transmitted power (P T ) was obtained for thickness of 1Â. The values of P A were similar for all thicknesses. The thickness of 1x showed the higher values of e 0 , e 00 , e Ã and tan d.

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“…The XRD studies suggest that the PESC composites are amorphous in nature. The decrease in the E a values for the PESC composites suggests that the increase in charge carrier concentration (or electron density) causes an increase in the charge density in the localized state density in the band gap . The decrease in activation energy observed in the PESC composites may be due to a reduction in the intrinsic trapping states, which increases their conductivity .…”

Section: Resultsmentioning

confidence: 94%

Degradable and electrically conductive poly(3,4-ethylenedioxythiophene)/sigma cell cellulose polymer composites

2015

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Degradable poly(3,4‐ethylenedioxythiophene) (PEDOT) nanocomposites containing sigma cell cellulose (SC) were prepared by in situ polymerization and then characterized by Fourier transform infrared, ultraviolet–visible spectroscopy, and X‐ray diffraction methods. Morphology was studied using scanning electron microscopy and transmission electron microscopy. The formation of PEDOT/SC (PESC) composites were examined by thermogravimetric analyses. Results indicated a strong interaction between PEDOT and SC. Temperature‐dependent direct current (DC) conductivity within 298–503 K and biodegradable properties of PESC were investigated. Results showed that SC addition significantly improved the temperature‐dependent DC conductivity and biodegradability of PESC composites. The increased conductivity of PESC can be explained by the increased mobility of charge carriers caused by increased SC concentration. POLYM. COMPOS., 38:1864–1872, 2017. © 2015 Society of Plastics Engineers

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Electrical conductivity and dielectric properties of sulfamic acid doped polyaniline

Cited by 50 publications

References 22 publications

Switching plasmon coupling through the formation of dimers from polyaniline-coated gold nanospheres

Switching plasmon coupling through the formation of dimers from polyaniline-coated gold nanospheres

Study of Microwave Absorbing Properties of Polyaniline/STF Conducting Composites Prepared by in Situ Polymerization

Degradable and electrically conductive poly(3,4-ethylenedioxythiophene)/sigma cell cellulose polymer composites

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