Ferroelectric Fractional‐Order Capacitors

Abstract

Poly(vinylidene fluoride)‐based polymers and their blends are used to fabricate electrostatic fractional‐order capacitors. This simple but effective method allows us to precisely tune the constant phase angle of the resulting fractional‐order capacitor by changing the blend composition. Additionally, we have derived an empirical relationship between the ratio of the blend constituents and the constant phase angle to facilitate the design of a fractional‐order capacitor with a desired constant phase angle. The structural composition of the fabricated blends is investigated by using Fourier transform infrared spectroscopy and X‐ray diffraction techniques.

Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

“…Unfortunately, these elements are not yet commercially available [17][18][19] and, therefore, they have to be approximated by appropriate integer-order networks. A possible solution for approximating fractional-order capacitors is the employment of an RC network, [20][21][22] but this su®ers from the requirement for re-designing the network in order to change the characteristics of the fractional-order element.…”

Fractional-Order Hartley Oscillator

“…First, terpolymer namely, PVDF-TrFE-CFE powder is dissolved in a N, N-Dimethylformamide (DMF) solvent, under magnetic stirring for 48 hours to get 0.1 g / ml solution [16]. The MoS 2 powder is dispersed in DMF at a concentration of 20 mg/ml and stirred for two hours using a tip-type sonicator.…”

An ultra-broadband single-component fractional-order capacitor using MoS2-ferroelectric polymer composite

“…[1][2][3][4][5][6][7][8][9][10][11] Thanks to the additional parameter, namely, the fractional order (see supplementary material Sec. S1 and Fig.…”

“…S2 and S3)], and dipolar relaxation of ferroelectric polymers. 5,44 By carefully selecting the parameters of the composite, the spectra of these three mechanisms can be moved to overlap, which eventually yields a CPA with a broadband CPZ. The value of the CPA can be tuned by adjusting the volume ratio of MoS 2 and/or using a different type of ferroelectric polymer (since every ferroelectric polymer's dipolar relaxation frequency is different 44 ).…”

“…41 (2) Dipolar relaxation that takes place at intermediate frequencies due to the lack of the alignment response of the abundant dipoles in the polymer to the polarity change of the applied voltage. 5 Adding more fillers results in shifting of Maxwell-Wagner-Sillars relaxation towards higher frequencies [Figs. S4-S7].…”