Preparation and characterization of poly(vinylidene fluoride-trifluoroethylene)/barium titanate polymer nanocomposite for ferroelectric applications

Abstract

Barium titanate nanoparticles with an average size of <100 nm were added to poly(vinylidene fluoride‐trifluoroethylene) copolymer in varying concentrations (0.2, 0.4, 0.6, and 0.8 wt%) in liquid phase under bath sonication and annealed at 120°C for 2 h. The Fourier transform infrared spectroscopy, X‐ray diffraction, Raman spectroscopy, and Differential scanning calorimetry studies reveals an increase in the β‐phase content of the nanocomposite, which is a promising inference for the increased ferroelectric property of the material. Scanning electron microscopy and Atomic force microscopy was used to study the surface topography of the spin coated thin films. Polarization–electric field studies clearly indicating the enhanced ferroelectric nature of optimized concentration with highest remnant polarization. All these results nominate this polymer nanocomposite as a promising material for ferroelectric applications like nonvolatile memory devices. POLYM. COMPOS., 38:1655–1661, 2017. © 2015 Society of Plastics Engineers

Ultrahigh Mobility in Solution‐Processed Solid‐State Electrolyte‐Gated Transistors

“…These include p-type, n-type, and ambipolar polymers such as poly(3-hexylthiophene-2,5-diyl) (P3HT), poly (9,9- Before entering into the details of transistor fabrication and measurements, we investigated the morphological and physical properties of the new dielectrics by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and metal-insulator-metal (MIM) capacitance measurements. [34][35][36] From Figure 2d, the intensity of the key peaks associated with the formation of β-phase in P(VDF-TrFE) at 850 cm −1 (CF symmetric stretch), 1288 cm −1 (CF asymmetric stretch), and 1400 cm −1 (CH 2 bond and CC asymmetric stretch) [TFSI] content increases from 0.5 to 3 v% ( Table 1). In Figure 2b and Figure S2a and Figure S2b, Supporting Information).…”

“…Additionally, FTIR spectroscopy reveals a decrease in the crystalline β-phase of P(VDF-TrFE) in the SEGI dielectric matrix, which is known to reduce the ferroelectric properties. [34][35][36] From Figure 2d, the intensity of the key peaks associated with the formation of β-phase in P(VDF-TrFE) at 850 cm −1 (CF symmetric stretch), 1288 cm −1 (CF asymmetric stretch), and 1400 cm −1 (CH 2 bond and CC asymmetric stretch) Adv. Mater.…”

The effects of additions of two-dimensional graphitic-C3N4 on the negative electro-caloric effects in P(VDF-TrFE) copolymers

“…10 In the P(VDF-TrFE) copolymer the crystal defects in the PVDF can be reduced by the addition of uorine atoms, leading to the increased crystallinity of the copolymer. 11 The copolymer P(VDF-TrFE) can crystallize with the same chain conformation as the b-PVDF, 12 if the content of TrFE is more than 18%. The ferroelectric properties of P(VDF-TrFE) is much better than those of PVDF due to the existence of intrinsic bphase in P(VDF-TrFE).…”

β‐Polymorph enhancement in poly(vinylidene fluoride) by blending with polyamide 6 and barium titanate nanoparticles

“…As Figure 3 shows, the main elements of PVDF; carbon (C) and fluorine (F) depicted peaks at 0.28 and 0.67 keV, respectively. [31][32][33][34] Moreover, Ba, O, and Ti (TiL α , TiK α , TiK β ) characteristic peaks labeled on the graphs corroborate the presence of BT nanoparticles in the PVDF matrix. Ti characteristic peaks at K α = 4.508 and K β = 4.931 keV overlap with Ba characteristic peaks at L α = 4.465 and L β1 = 4.827 keV.…”