Azzaz, Cherif M., Demarquette, Nicole R. et Zednik, Ricardo J..
2026.
« Self-assembly of polyvinylidene fluoride (PVDF) and carbon nanotubes into flexible piezoelectric nanofiber transducers ».
Scientific Reports, vol. 16, nº 1.
Compte des citations dans Scopus : 2.
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Résumé
We report a scalable fabrication strategy for flexible piezoelectric nanofiber transducers through a single-nozzle, self-assembling electrospinning process. Unlike traditional coaxial methods, this approach exploits the surface energy differential between polyvinylidene fluoride (PVDF) and multiwalled carbon nanotubes (MWCNTs) to drive the spontaneous formation of a core-shell architecture. The resulting 80 nm diameter fibers feature a predominantly crystalline β-phase PVDF shell, with molecular chains oriented along the [001] fibers axis, encapsulating a perfectly aligned MWCNT core that serves as an integrated internal electrode. Quantitative X-ray diffraction analysis confirms a fivefold increase in β-phase content relative to as-received PVDF powder, with a total crystallinity of 52% in the electrospun nanofibers. This unique coaxial configuration enables the demonstration of both direct and inverse piezoelectric effects in a single-step manufactured nanofiber device, without any post-fabrication electrical poling. The manufactured device yields an effective piezoelectric voltage coefficient of geff = 0.22 V.m.N⁻¹, comparable to values reported for fully poled bulk PVDF films, and an effective piezoelectric strain coefficient of deff = 2.8 pC.N⁻¹ under electrical excitation. The flexible, continuous nanofiber format, ten times thinner than spider silk, opens exciting possibilities for selfpowered sensing, smart textiles, artificial skin, and structural health monitoring applications.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Chercheur(-euse): | Chercheur(-euse) Demarquette, Nicole R. Zednik, Ricardo |
| Affiliation: | Génie mécanique, Génie mécanique |
| Date de dépôt: | 25 sept. 2026 20:41 |
| Dernière modification: | 27 sept. 2026 19:09 |
| URI: | https://espace2.etsmtl.ca/id/eprint/34423 |
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