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Article

Increasing Permittivity and Mechanical Harvesting Response of PVDF-Based Flexible Composites by Using Ag Nanoparticles onto BaTiO3 Nanofillers

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Dielectrics, Ferroelectrics & Multiferroics Group, Faculty of Physics, Al. I. Cuza University of Iasi, Bv. Carol I, no. 11, 700506 Iasi, Romania
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Department of Exact & Natural Sciences, Institute of Interdisciplinary Research, Al. I. Cuza University of Iasi, Bv. Carol I, no. 11, 700506 Iasi, Romania
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National Institute of Research and Development for Technical Physics, 700050 Iasi, Romania
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National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
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GRADIENT Srl., Str. Codrescu, no. 17, 700495 Iasi, Romania
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Research Center on Advanced Materials and Technologies, Department of Exact & Natural Sciences, Institute of Interdisciplinary Research, Al. I. Cuza University of Iasi, Bv. Carol I, no.11, 700506 Iasi, Romania
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Faculty of Electrical Engineering and Computer Science & MANSiD Research Center, Stefan Cel Mare University, 720229 Suceava, Romania
*
Authors to whom correspondence should be addressed.
Academic Editor: Emilia Iglesias Martínez
Nanomaterials 2022, 12(6), 934; https://doi.org/10.3390/nano12060934
Received: 30 January 2022 / Revised: 3 March 2022 / Accepted: 10 March 2022 / Published: 12 March 2022
(This article belongs to the Special Issue Nanoparticles Based on Noble Metals: From Synthesis to Application)
The role of Ag addition on the structural, dielectric, and mechanical harvesting response of 20%(xAg − (1 − x)BaTiO3) − 80%PVDF (x = 0, 2, 5, 7 and 27 vol.%) flexible composites is investigated. The inorganic fillers were realized by precipitating fine (~3 nm) silver nanoparticles onto BaTiO3 nanoparticles (~60 nm average size). The hybrid admixtures with a total filling factor of 20 vol.% were embedded into the PVDF matrix. The presence of filler enhances the amount of β-PVDF polar phase and the BaTiO3 filler induces an increase of the permittivity from 11 to 18 (1 kHz) in the flexible composites. The addition of increasing amounts of Ag is further beneficial for permittivity increase; with the maximum amount (x = 27 vol.%), permittivity is three times larger than in pure PVDF (εr ~ 33 at 1 kHz) with a similar level of tangent losses. This result is due to the local field enhancement in the regions close to the filler-PVDF interfaces which are additionally intensified by the presence of silver nanoparticles. The metallic addition is also beneficial for the mechanical harvesting ability of such composites: the amplitude of the maximum piezoelectric-triboelectric combined output collected in open circuit conditions increases from 0.2 V/cm2 (PVDF) to 30 V/cm2 for x = 27 vol.% Ag in a capacitive configuration. The role of ferroelectric and metallic nanoparticles on the increasing mechanical-electric conversion response is also been explained. View Full-Text
Keywords: Ag nanoparticles; BaTiO3; hybrid filler; PVDF matrix; flexible composite; permittivity; mechanical energy harvesting Ag nanoparticles; BaTiO3; hybrid filler; PVDF matrix; flexible composite; permittivity; mechanical energy harvesting
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MDPI and ACS Style

Horchidan, N.; Ciomaga, C.E.; Curecheriu, L.P.; Stoian, G.; Botea, M.; Florea, M.; Maraloiu, V.A.; Pintilie, L.; Tufescu, F.M.; Tiron, V.; Rotaru, A.; Mitoseriu, L. Increasing Permittivity and Mechanical Harvesting Response of PVDF-Based Flexible Composites by Using Ag Nanoparticles onto BaTiO3 Nanofillers. Nanomaterials 2022, 12, 934. https://doi.org/10.3390/nano12060934

AMA Style

Horchidan N, Ciomaga CE, Curecheriu LP, Stoian G, Botea M, Florea M, Maraloiu VA, Pintilie L, Tufescu FM, Tiron V, Rotaru A, Mitoseriu L. Increasing Permittivity and Mechanical Harvesting Response of PVDF-Based Flexible Composites by Using Ag Nanoparticles onto BaTiO3 Nanofillers. Nanomaterials. 2022; 12(6):934. https://doi.org/10.3390/nano12060934

Chicago/Turabian Style

Horchidan, Nadejda, Cristina Elena Ciomaga, Lavinia Petronela Curecheriu, George Stoian, Mihaela Botea, Mihaela Florea, Valentin Adrian Maraloiu, Lucian Pintilie, Florin Mihai Tufescu, Vasile Tiron, Aurelian Rotaru, and Liliana Mitoseriu. 2022. "Increasing Permittivity and Mechanical Harvesting Response of PVDF-Based Flexible Composites by Using Ag Nanoparticles onto BaTiO3 Nanofillers" Nanomaterials 12, no. 6: 934. https://doi.org/10.3390/nano12060934

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