| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Macutkevic, Jan
Center for Physical Sciences and Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2023Multilayered Composites with Carbon Nanotubes for Electromagnetic Shielding Applicationcitations
- 2022Dielectric Properties of Hybrid Polyethylene Composites Containing Cobalt Nanoparticles and Carbon Nanotubescitations
- 2022Tannin-based resins for 3D printing of porous carbon architecturescitations
- 2022Electrical conductivity and dielectric relaxation in Ag1-xLixNbO3citations
- 2022Electrical Conductivity and Dielectric Relaxation in Ag1−xLixNbO3citations
- 2021Dielectric properties of PDMS composites filled with SrTiO 3 nanoparticlescitations
- 2021Fibers of Thermoplastic Copolyamides with Carbon Nanotubes for Electromagnetic Shielding Applicationscitations
- 2021Dielectric Relaxation Spectroscopy and Synergy Effects in Epoxy/MWCNT/Ni@C Compositescitations
- 2020Crossover from Ferroelectric to Relaxor Behavior in Ba1−xCaxTiO3 (x = 0.17) Systemcitations
- 2020Dielectric Relaxation in the Hybrid Epoxy/MWCNT/MnFe2O4 Compositescitations
- 2020Electrical percolation and electromagnetic properties of polydimethylsiloxane composites filled with Ag nanoparticles of different sizescitations
- 2020THz Spectroscopy as a Versatile Tool for Filler Distribution Diagnostics in Polymer Nanocompositescitations
- 2019Fine Tuning of Electrical Transport and Dielectric Properties of Epoxy/Carbon Nanotubes Composites via Magnesium Oxide Additivescitations
- 2019Electromagnetic Properties of Carbon Gelscitations
- 2019Broadband Dielectric Properties of Fe<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O Nanorods/Epoxy Resin Compositescitations
- 2019Electromagnetics of carbon: Nano versus microcitations
- 2019Broadband Dielectric Properties of Fe2O3·H2O Nanorods/Epoxy Resin Compositescitations
- 2019Dielectric Properties of Epoxy-Matrix Composites with Tungsten Disulfide Nanotubescitations
- 2018Size-dependent electrical and thermal properties of onion-like carbons / polyurethane compositescitations
- 2018Influence of carbon nanotube surface treatment on resistivity and low‐frequency noise characteristics of epoxy‐based compositescitations
- 2018Hot-melt adhesives based on co-polyamide and multiwalled carbon nanotubescitations
- 2015Ultrasonic and dielectric relaxations in PDMS/ZnO nanocompositecitations
- 2015Synergy effects in the electrical conductivity behavior of onion-like carbon and multiwalled carbon nanotubes compositescitations
- 2014Dielectric properties of graphite-based epoxy compositescitations
- 2010Terahertz sensing with carbon nanotube layers coated on silica fibers: Carrier transport versus nanoantenna effectscitations
Places of action
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article
Dielectric Relaxation in the Hybrid Epoxy/MWCNT/MnFe2O4 Composites
Abstract
<jats:p>The electrical properties of epoxy/MWCNT (multi-walled carbon nanotubes)/MnFe2O4 hybrid composites loaded with MWCNTs (below, 0.09 vol.%, and above, 0.58 vol.%, percolation threshold) and varying concentrations of MnFe2O4 up to 10 vol.% were studied in a wide frequency range (20 Hz–40 GHz) at different temperatures (20 K–500 K). At low frequencies, the dielectric permittivity and the electrical conductivity of composites with fixed amounts of MWCNT are strongly dependent on MnFe2O4 content. For MWCNT concentrations above the percolation threshold (i.e., 0.58 vol.%), the electrical conductivity highly decreases with the increase of the MnFe2O4 fraction. In contrast, for the epoxy/MWCNT just below the onset of electrical conductivity (0.09 vol.% of MWCNTs), there exists an optimal concentration of MnFe2O4 inclusions (i.e., 0.025 vol.%), leading to a dramatic increase of the electrical conductivity by three orders of magnitude. The electrical transport in composites is mainly governed by electron tunneling at lower temperatures (below 200 K), and it is highly impacted by the matrix conductivity at higher temperatures (above 400 K). The electrical properties were discussed in terms of the Maxwell–Wagner relaxation and distributions of relaxation times. A non-invasive platform based on dielectric relaxation spectroscopy was proposed for enhancing the synergetic effect coursed by using multiple nanoinclusions in polymer composites just below the percolation threshold.</jats:p>