Revisiting of δ−PVDF nanoparticles via phase separation with giant piezoelectric response for the realization of self-powered biomedical sensors

Mishra, Hari Krishna; Gupta, Varun; Roy, Krittish; Babu, Anand; Kumar, Ajay; Mandal, Dipankar

doi:10.1016/j.nanoen.2022.107052

Cited by 52 publications

(39 citation statements)

References 71 publications

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“…[39][40][41] Three diffraction peaks below 21 confirms the α phase crystallization of P(VDF-HFP) in PNC0. 39,42 The decrease in intensity and increase in FWHM of 17.9 peak can be explained by an increase in the nucleation of the electroactive phase with filler concentration. 39,42,43 The increase in the intensity of planes corresponding to filler indicates the increase in a relative number of plane corresponding filler (Figure S4).…”

Section: Crystallinity and Chemical Composition Analysismentioning

confidence: 99%

“…39,42 The decrease in intensity and increase in FWHM of 17.9 peak can be explained by an increase in the nucleation of the electroactive phase with filler concentration. 39,42,43 The increase in the intensity of planes corresponding to filler indicates the increase in a relative number of plane corresponding filler (Figure S4). Diffraction spectra of the hot-pressed structure shown in Figure 3e indicate that there is a change in the orientation of the chain axis with an increase in the number of layers.…”

Section: Crystallinity and Chemical Composition Analysismentioning

confidence: 99%

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Multifunctional poly(vinylidene fluoride–co‐hexafluoropropylene) ‐ zinc stannate nanocomposite for high energy density capacitors and piezo‐phototronic switching

Kumar

Mandal

2023

J of Applied Polymer Sci

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Electroactive multifunctional nanocomposite films of poly(vinylidene fluoride – co ‐ hexafluoropropylene) (P(VDF‐HFP)) and different zinc stannate (ZnSnO3) filler concentrations were processed by hot pressing to achieve multilayer structure formation. A notable increase in the dielectric constant (K ≈ 30 at 1 kHz) was achieved in the three‐layered hot‐pressed composite film. The resultant relaxation time, that is, the time required to reach the remnant polarization (Pr) from saturation polarization (Ps) of hot‐pressed films reduced to 1/20th time to that of its single‐layer film. Furthermore, ferroelectric loop data of hot‐pressed structure shows the lower value of remnant polarization (0.20 μC/cm2) as compared to nanocomposite film (0.28 μC/cm2) under similar measurement conditions, which further leads to an increase in energy density (2900 mJ/cm3 at 250 MV/m vs 500 mJ/cm3 at 150 MV/m). The study shows the dependency of energy storage and remnant polarization on the relaxation time of dielectric that can be further explored to enhance the energy density of dielectric capacitors. Thereafter, the multifunctional nature of nanocomposite film is shown by coupling semiconducting, light and piezoelectric effects in piezo‐phototronic switching under tensile and compressive strain in dark and light conditions.

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Section: Crystallinity and Chemical Composition Analysismentioning

confidence: 99%

Section: Crystallinity and Chemical Composition Analysismentioning

confidence: 99%

Multifunctional poly(vinylidene fluoride–co‐hexafluoropropylene) ‐ zinc stannate nanocomposite for high energy density capacitors and piezo‐phototronic switching

Kumar

Mandal

2023

J of Applied Polymer Sci

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“…Self-powered sensors have demonstrated their significance in various industrial and residential low-power IoT applications [1,2]. Temperature [3][4][5], humidity [6,7], gas [8][9][10][11], wearable [5,12,13], biomedical [14][15][16], and under-skin [17] self-powered sensors were reported in the literature. One of the main challenges in optimizing the performance of such sensors is the capability of balancing the energy budget [18], on the one hand, minimizing the energy consumption of the sensor as well as its associated interfacing circuit [19], and on the other hand, maximizing the energy harvested with minimum conversion losses [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…A wide range of energy resources was harvested [22]. These energy resources include but are not limited to thermal energy through using thermoelectric harvesters [23][24][25], kinetic energy that can be harvested using piezoelectric materials [16,[26][27][28][29], and light-harvester through either solar spectrum or artificial lighting [13,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Transparency against efficiency in uni/bifacial mesostructured-based solar cells for self-powered sensing applications

Mahran

Abdellatif

2022

Analog Integr Circ Sig Process

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Low-power IoT sensing applications have proliferated, focusing on self-powered sensors. Accordingly, researchers have investigated serval procedures for the power management of such self-powered sensors. Obesely, minimizing the energy consumed by the sensor is critical to efficient power management. However, another challenge is still considered in harvesting energy effectively. Herein, we provide an attempt to investigate light harvesters that are capable of semi-transparent applications. Six samples were simulated under three light sources while performing a unifacial and bifacial optical injection. The optoelectronic numerical model has shown the utility of perovskite solar cells to harvest the AM1.5G solar spectrum up to 28.63%, with transparency reaching 87%. On the other hand, the bifacial condition boosted the overall cell efficiency to nearly 33% with transparency of 90%, without considering Fresnel glass reflection of 8%. The proposed bifacial cell is a primary light-harvesting source for four IoT sensing applications, including biomedical sensing, underwater harvesting, and IoT sensing in intelligent vehicles and buildings.

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“…In this study, we employ this property to develop a device that operates with a single input to provide multiple output responses in accordance with the force and piezo element directions derived from the polarization direction. Previous studies on PVDF lms have generally focused on advancing fabrication methods, such as patterning processes [21,22] or modifying the molecular phase [23,24]. However, applications of PVDF lms with anisotropic [25] and three-dimensional (3D) structures have rarely been introduced.…”

Section: Introductionmentioning

confidence: 99%

Multi-responsive 3D Structured PVDF Cube Switch for Security System Using Piezoelectric Anisotropy

Song

2022

Preprint

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Advancements in flexible electronics using piezoelectric materials have paved the way for their numerous applications. In this study, we suggest a 3D structured polyvinylidene fluoride (PVDF) film cube switch to maximize piezoelectric anisotropy and flexibility. Unlike piezoelectric material-based flexible electronics, PVDF cube switches have a simple design and easy fabrication process. Each side of the cube switch demonstrates independent voltage signals with pressing displacements and corresponding directions. With cutting angle variation and planar figure designs, derived cube switches respond with various combination of voltage waveforms. PVDF switches can endure more than 1000 cycles of 70% vertical strain in terms of both electrically and mechanically. As an application, we establish security system with multi-responsibility of a cube switch. This security system can protect users from potential threats owing to its multi-responsibility and user-dependent operability.

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Revisiting of δ−PVDF nanoparticles via phase separation with giant piezoelectric response for the realization of self-powered biomedical sensors

Cited by 52 publications

References 71 publications

Multifunctional poly(vinylidene fluoride–co‐hexafluoropropylene) ‐ zinc stannate nanocomposite for high energy density capacitors and piezo‐phototronic switching

Multifunctional poly(vinylidene fluoride–co‐hexafluoropropylene) ‐ zinc stannate nanocomposite for high energy density capacitors and piezo‐phototronic switching

Transparency against efficiency in uni/bifacial mesostructured-based solar cells for self-powered sensing applications

Multi-responsive 3D Structured PVDF Cube Switch for Security System Using Piezoelectric Anisotropy

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