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- Title
A facile method to develop electroactive β-phase in PVF<sub>2</sub> molecules by doping Au-nanoparticles in the form of nanocomposites for dielectric applications.
- Authors
Susrutha, B.; Phule, A. D.
- Abstract
Poly(vinylidene fluoride) (PVF2) has emerged as a promising material for dielectric applications due to its excellent electrical and mechanical properties. However, maximizing the electroactive β-phase content in PVF2 is crucial to enhance its dielectric performance. In this study, we propose a facile method to enhance the β-phase content in PVF2 by doping gold nanoparticles (n-Au) (0–5 wt%) in the form of nanocomposites. The X-ray diffraction (XRD) patterns obtained for the annealed Au-PVF2 films of Au-content specifically at 2 and 5 wt% exhibit a characteristic (200) peak of β-PVF2, whereas non-annealed samples show diffraction peaks of (020) and (110) from a nanocrystalline α-PVF2 phase. The Fourier transformed infrared spectroscopy (FTIR) study illustrates distinct absorption bands at 483 and 510, 834, and 880 cm−1 characterize the formation of β-PVF2 phase in respective Au-PVF2 films compared to pure PVF2 film which still contains IR bands of α-PVF2 after annealing. Unambiguously, the gold inclusions induce a α → β-PVF2 phase transformation. An enhanced dielectric constant value (εr-value), as large as 70 (i.e., an order of larger magnitude of the basic PVF2 value), is found at low frequencies near 100 Hz after an optimized 2.0 wt% Au loading of a percolation threshold value. Our results reveal that these nanocomposites hold significant potential for applications in high-performance dielectric devices and energy storage systems requiring superior dielectric properties.
- Subjects
DIELECTRIC devices; ENERGY storage; FOURIER transform infrared spectroscopy; NANOCOMPOSITE materials; DIELECTRIC properties; DIELECTRIC materials
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2024, Vol 49, Issue 7, p9467
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-024-08851-8