Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films
This work aimed to study the influence of the hybrid interface in polyvinylidene fluoride (PVDF)-based composite thin films on the local piezoelectric response. Our results provide evidence of a surprising contradiction: the optimization process of the β-phase content using nano-inclusions did not c...
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MDPI AG
2022-02-01
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| author | Huyen T. T. Nong Anh N. Nguyen Jeanne Solard Andres Gomez Silvana Mercone |
| author_facet | Huyen T. T. Nong Anh N. Nguyen Jeanne Solard Andres Gomez Silvana Mercone |
| author_sort | Huyen T. T. Nong |
| collection | DOAJ |
| description | This work aimed to study the influence of the hybrid interface in polyvinylidene fluoride (PVDF)-based composite thin films on the local piezoelectric response. Our results provide evidence of a surprising contradiction: the optimization process of the β-phase content using nano-inclusions did not correspond to the expected nanoscale piezoelectric optimization. A large piezoelectric loss was observed at the nanoscale level, which contrasts with the macroscopic polarization measurement observations. Our main goal was to show that the dispersion of metallic ferromagnetic nano-inclusions inside the PVDF films allows for the partial recovery of the local piezoelectric properties. From a dielectric point of view, it is not trivial to expect that keeping the same amount of the metallic volume inside the dielectric PVDF matrix would bring a better piezoelectric response by simply dispersing this phase. On the local resonance measured by PFM, this should be the worst due to the homogeneous distribution of the nano-inclusions. Both neat PVDF films and hybrid ones (0.5% in wt of nanoparticles included into the polymer matrix) showed, as-deposited (un-poled), a similar β-phase content. Although the piezoelectric coefficient in the case of the hybrid films was one order of magnitude lower than that for the neat PVDF films, the robustness of the polarized areas was reported 24 h after the polarization process and after several images scanning. We thus succeeded in demonstrating that un-poled polymer thin films can show the same piezoelectric coefficient as the poled one (i.e., 10 pm/V). In addition, low electric field switching (50 MV/m) was used here compared to the typical values reported in the literature (100–150 MV/m). |
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| last_indexed | 2024-03-10T00:10:43Z |
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| spelling | doaj.art-012bcd7980204fdda459f8cf5a29c72a2023-11-23T16:00:05ZengMDPI AGApplied Sciences2076-34172022-02-01123158910.3390/app12031589Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin FilmsHuyen T. T. Nong0Anh N. Nguyen1Jeanne Solard2Andres Gomez3Silvana Mercone4LSPM CNRS UPR-3407, University of Sorbonne Paris North (USPN), 99, Av. J. B. Clément, 93430 Villetaneuse, FranceInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay Dist., Hanoi 10072, VietnamLPL CNRS UMR-7538, University of Sorbonne Paris North (USPN), 99, Av. J. B. Clément, 93430 Villetaneuse, FranceICMAB CSIC, Autonomous University of Barcelona (UAB), 08193 Bellaterra, SpainGREMAN UMR7347—CNRS, Tours University (UT), Parc Grandmont, 37200 Tours, FranceThis work aimed to study the influence of the hybrid interface in polyvinylidene fluoride (PVDF)-based composite thin films on the local piezoelectric response. Our results provide evidence of a surprising contradiction: the optimization process of the β-phase content using nano-inclusions did not correspond to the expected nanoscale piezoelectric optimization. A large piezoelectric loss was observed at the nanoscale level, which contrasts with the macroscopic polarization measurement observations. Our main goal was to show that the dispersion of metallic ferromagnetic nano-inclusions inside the PVDF films allows for the partial recovery of the local piezoelectric properties. From a dielectric point of view, it is not trivial to expect that keeping the same amount of the metallic volume inside the dielectric PVDF matrix would bring a better piezoelectric response by simply dispersing this phase. On the local resonance measured by PFM, this should be the worst due to the homogeneous distribution of the nano-inclusions. Both neat PVDF films and hybrid ones (0.5% in wt of nanoparticles included into the polymer matrix) showed, as-deposited (un-poled), a similar β-phase content. Although the piezoelectric coefficient in the case of the hybrid films was one order of magnitude lower than that for the neat PVDF films, the robustness of the polarized areas was reported 24 h after the polarization process and after several images scanning. We thus succeeded in demonstrating that un-poled polymer thin films can show the same piezoelectric coefficient as the poled one (i.e., 10 pm/V). In addition, low electric field switching (50 MV/m) was used here compared to the typical values reported in the literature (100–150 MV/m).https://www.mdpi.com/2076-3417/12/3/1589PVDFhybrid filmpiezoelectric responsePFMnano-inclusions dispersion |
| spellingShingle | Huyen T. T. Nong Anh N. Nguyen Jeanne Solard Andres Gomez Silvana Mercone Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films Applied Sciences PVDF hybrid film piezoelectric response PFM nano-inclusions dispersion |
| title | Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films |
| title_full | Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films |
| title_fullStr | Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films |
| title_full_unstemmed | Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films |
| title_short | Robust Piezoelectric Coefficient Recovery by Nano-Inclusions Dispersion in Un-Poled PVDF–Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> Ultra-Thin Films |
| title_sort | robust piezoelectric coefficient recovery by nano inclusions dispersion in un poled pvdf ni sub 0 5 sub zn sub 0 5 sub fe sub 2 sub o sub 4 sub ultra thin films |
| topic | PVDF hybrid film piezoelectric response PFM nano-inclusions dispersion |
| url | https://www.mdpi.com/2076-3417/12/3/1589 |
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