Interfacial effects on ferroelectric and dielectric properties of GO reinforced free-standing and flexible PVDF/ZnO composite membranes: Bias dependent impedance spectroscopy

Kadir, E.S.; Gayen, R.N.; Paul, Rajib; Biswas, Sayantan

doi:10.1016/j.jallcom.2020.155974

Cited by 27 publications

(15 citation statements)

References 39 publications

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“…This finding indicates that the frequency maximum followed Arrhenius behaviour. The calculated activation energy from Arrhenius Equation ( 7) is given below [44][45].…”

Section: Impedance Analysismentioning

confidence: 99%

Low-cost nebulizer spray deposited conduction mechanism of thin film ZnO nanoparticles

Amudhavalli¹,

Mariappan²,

Prasath³

2023

JOR

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The Zinc Oxide (ZnO) thin films have been deposited on glass substrate at different temperature from 300 to 500 o C by nebulizer spray pyrolysis technique. The prepared films were characterized by X-Ray diffraction (XRD), High resolution scanning electron microscope (HRSEM), Energy dispersive analysis by X-rays (EDAX), Photoluminescence (PL), UV-Vis-NIR spectrometer and impedance spectroscopy, respectively. The XRD confirms that the films are polycrystalline in nature with hexagonal wurtzite crystal structure with (002) plane as preferential orientation. The various parameters such as crystallite size, micro strain, and dislocation density were calculated from X-ray diffraction. HR-SEM images show smooth, tiny grains and dense morphology. The PL studies exhibits two emission peaks one at 389 nm corresponding to band gap excitonic emission and another located at 490 nm due to the presence of singly ionized oxygen vacancies. The UV-Vis-NIR spectrometer confirms the possibility of good transparent ZnO films with an average transmission of about ~85-95% in the visible region and optical band gap shifted from 3.37 eV to 3.2 eV with increase in temperature and which is supported by PL study. The semiconductor bahaviour and activation energy of these films have been confirmed by impedance spectroscopy measurements.

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“…This finding indicates that the frequency maximum followed Arrhenius behaviour. The calculated activation energy from Arrhenius Equation ( 7) is given below [44][45].…”

Section: Impedance Analysismentioning

confidence: 99%

Low-cost nebulizer spray deposited conduction mechanism of thin film ZnO nanoparticles

Amudhavalli¹,

Mariappan²,

Prasath³

2023

JOR

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“…[ 6 ] Zinc and oxygen are bonded tetrahedrally and form ZnO 4 groups, where the bond length along the c‐axis is 0.96% greater than the other three bonds. [ 14 ] Thus, ZnO exhibits inherent ferroelectric, piezoelectric properties, and acts as a nucleating agent to enhance the β phase content in PVDF. [ 4 ] Two‐dimensional morphology ZnO with large aspect ratio in form of nanoplate or nanoflake improves the dielectric constant and breakdown strength at low loading compared to zero‐dimensional fillers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of functionalized ZnO nanoflake loaded polyvinylidene fluoride composites with enhanced energy storage properties

Mukherjee

Ghosh

2023

Polymer Composites

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Polymer composite films are ideal materials for advanced energy storage capacitor in electrical systems. Therefore herein, we fabricated a novel series of polyvinylidene fluoride (PVDF) based composites embedded with well dispersed ZnO@APTES {surface modified zinc oxide with (3‐Aminopropyl) triethoxysilane (APTES)} nanoflake (0, 20, 30, 40, 50) vol% through solution casting method. Hydrothermally synthesized two‐dimensional ZnO was pre‐treated with H2O2 and surface modified with APTES for perfect distribution of nanoflake into PVDF matrix. Surface modification and high aspect ratio morphology of ZnO@APTES enhanced the interfacial interaction between organic PVDF and inorganic ZnO through reduction in heterogeneity between them. Surface functionalization reduced the dielectric loss and improved the overall energy storage performance. Investigation of electrical properties proclaimed incorporating 30 Vol% ZnO@APTES in PVDF as optimized loading due to its appreciable Wrec (recoverable energy density) about 3.2 J/cm3. Relative comparison of the energy storage density (Wrec) of PVDF/ZnO@APTES (30) vol% with recent published works established its enhanced capacitive response and its future application in energy storing portable device.

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“…One of the most recent reports [9] provides valuable data about bias dependent impedance spectroscopy of graphene oxide (GO) nanosheet reinforced PVDF/ZnO composite membranes produced by a chemical route. The authors have found the variation of the relaxation times with external bias indicates a filler-induced modification of the polymer interface and the GO conducting network facilitates better charge transport under a small applied field.…”

Section: Introductionmentioning

confidence: 99%

Impedance Spectroscopy of Lead-Free Ferroelectric Coatings

Aleksandrova

Пандиев

2021

Coatings

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This paper presents impedance measurements of ferroelectric structures involving lead-free oxide and polymer-oxide composite coatings for sensing and energy harvesting applications. Three different ferroelectric materials grown by conventional microfabrication technologies on solid or flexible substrates are investigated for their basic resonant characteristics. Equivalent electrical circuit models are applied to all cases to explain the electrical behavior of the structures, according to the materials type and thickness. The analytical results show good agreement with the experiments carried out on a basic types of excited thin-film piezoelectric transducers. Additionally, temperature and frequency dependences of the dielectric permittivity and losses are measured for the polymer-oxide composite device in relation with the surface morphology before and after introduction of the polymer to the functional film.

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Interfacial effects on ferroelectric and dielectric properties of GO reinforced free-standing and flexible PVDF/ZnO composite membranes: Bias dependent impedance spectroscopy

Cited by 27 publications

References 39 publications

Low-cost nebulizer spray deposited conduction mechanism of thin film ZnO nanoparticles

Low-cost nebulizer spray deposited conduction mechanism of thin film ZnO nanoparticles

Synthesis of functionalized ZnO nanoflake loaded polyvinylidene fluoride composites with enhanced energy storage properties

Impedance Spectroscopy of Lead-Free Ferroelectric Coatings

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