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46 results on '"Hoque, Nur Amin"'

19. Self‐Polarized ZrO2/Poly(vinylidene fluoride‐co‐hexafluoropropylene) Nanocomposite‐Based Piezoelectric Nanogenerator and Single‐Electrode Triboelectric Nanogenerator for Sustainable Energy Harvesting from Human Movements

Author

Saikh, Md. Minarul, Hoque, Nur Amin, Biswas, Prosenjit, Rahman, Wahida, Das, Namrata, Das, Sukhen, and Thakur, Pradip

Subjects
*ENERGY harvesting, *BLUE light emitting diodes, *TRIBOELECTRICITY, *HUMAN mechanics, *PIEZOELECTRIC devices, *ENERGY conversion, *ZIRCONIUM oxide
Abstract

Piezoelectric nanogenerators (PENGs) have been emerged as one of the most promising approach for harvesting energy from the movement of living system for low‐power electronic devices. Herein, a simple PENG and single‐electrode triboelectric nanogenerator (STENG) are reported that execute tremendous output performance. In zirconium oxide (ZrO2)/poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) nanocomposite polymer, ZrO2 acts as the nucleating agents for electroactive polymorph nucleation and also enhances the dielectric constant (≈23). Compared with previously reported PVDF‐HFP‐assisted prototype nanogenerators, this developed PENG exhibits excellent piezoelectric energy‐harvesting performance with very high power density, high energy conversion efficiency and high durability. The PENG exhibits a large value of open‐circuit voltage ≈120 V and short‐circuit current ≈1.95 μA under periodic finger imparting with high power density ≈7091 μW cm−3. Fabricated flexible PENG is capable to instantaneously light up commercially available 55 number of blue light emitting diode connected in parallel connection through bridge rectifier. High capacitor charging performance is also observed, such as 2.2 μF capacitor charged up to 3.5 V, in just 17 s time interval. Single‐electrode‐based TENG fabricated by this composite film also shows remarkable output voltage ≈7 V under finger touch. [ABSTRACT FROM AUTHOR]

Published
2021
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25. Er3+/Fe3+ Stimulated Electroactive, Visible Light Emitting, and High Dielectric Flexible PVDF Film Based Piezoelectric Nanogenerators: A Simple and Superior Self-Powered Energy Harvester with Remarkable Power Density

Author

Hoque, Nur Amin, primary, Thakur, Pradip, additional, Roy, Swagata, additional, Kool, Arpan, additional, Bagchi, Biswajoy, additional, Biswas, Prosenjit, additional, Saikh, Md. Minarul, additional, Khatun, Farha, additional, Das, Sukhen, additional, and Ray, Partha Pratim, additional

Published
2017
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37. Superior performances of in situsynthesized ZnO/PVDF thin film based self-poled piezoelectric nanogenerator and self-charged photo-power bank with high durability

Author

Thakur, Pradip, Kool, Arpan, Hoque, Nur Amin, Bagchi, Biswajoy, Khatun, Farha, Biswas, Prosenjit, Brahma, Debdip, Roy, Swagata, Banerjee, Somtirtha, and Das, Sukhen

Abstract

Herein, we have synthesized multitalented β crystallite prosperous and high dielectric ZnO/PVDF thin films via in situ process for energy harvesting and energy storing applications. The impregnation of the ZnO nanoparticles (NPs) in PVDF matrix has enhanced the electroactive β crystal nucleation (F(β)~ 84% at 0.85vol% doping) as well as piezoelectricity (d33~ 50 pC/N at 50Hz) and the dielectric value (~ 109 at 1.7vol% loading) effectively. The nanogenerator, named as ZPENG and the self-charged photo-power bank (PPB) developed using the optimized supercilious piezoelectric and dielectric films have exhibited superiority in power generation (power density ~ 32.5mW/cm3) and energy storage capability (~ 2000 F/) respectively that are highly impressive outputs compare to other similar prototype devices reported elsewhere till now. The realistic utilities of our fabricated ZPENG have been proved by light up 15 serially connected commercial blue light emitting diodes (LEDs) and charging capacitor (1 μF) in a small time span under repetitive finger impartation. The ZPENG is also shows continuous band like power generation under vibration occurred due to blood circulation in human body. The self-charged PPB is also able to power up blue LED that has confirmed its realistic applicability as a power source.

Published
2018
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41. Er3+/Fe3+Stimulated Electroactive, Visible Light Emitting, and High Dielectric Flexible PVDF Film Based Piezoelectric Nanogenerators: A Simple and Superior Self-Powered Energy Harvester with Remarkable Power Density

Author

Hoque, Nur Amin, Thakur, Pradip, Roy, Swagata, Kool, Arpan, Bagchi, Biswajoy, Biswas, Prosenjit, Saikh, Md. Minarul, Khatun, Farha, Das, Sukhen, and Ray, Partha Pratim

Abstract

The design of an energy-harvesting unit with superior output characteristics, i.e., high power density, is a great technological challenge in the present time. Here, simple, lightweight, flexible, and cost-effective piezoelectric nanogenerators (PENGs) have been fabricated by integrating the aluminum electrodes onto Er3+/Fe3+stimulated electroactive, visible-light-emitting, and large dielectric PVDF films in which ErCl3·6H2O and Fe(NO3)3·9H2O act as the catalytic agents for electroactive β polymorph nucleation and the enhancement of dielectric properties. The developed PENGs exhibit excellent energy-harvesting performance with very high power density and very fast charging ability compared with the previously reported PVDF-assisted prototype nanogenerators. The PENGs lead to very large power density (∼160 and ∼55.34 mW cm–3) under periodic finger imparting for Er3+- and Fe3+-stimulated PVDF-film-based energy-harvester units, respectively. The fabricated self-powered PENG is also able to light up 54 commercially available light-emitting diodes.

Published
2017
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43. In situ synthesis of Ni(OH)2 nanobelt modified electroactive poly(vinylidene fluoride) thin films: remarkable improvement in dielectric properties.

Author

Thakur, Pradip, Kool, Arpan, Bagchi, Biswajoy, Hoque, Nur Amin, Das, Sukhen, and Nandy, Papiya

Abstract

A facile and low cost synthesis of Ni(OH)2 nanobelt (NB) modified electroactive poly(vinylidene fluoride) (PVDF) thin films with excellent dielectric properties has been reported via in situ formation of Ni(OH)2 NBs in the PVDF matrix. The formation and morphology of the NBs are confirmed by UV-visible spectroscopy and field emission scanning electron microscopy respectively. A remarkable improvement in electroactive β phase nucleation (∼82%) and the dielectric constant (ε∼ 3.1 × 106 at 20 Hz) has been observed in the nanocomposites (NCs). The interface between the NBs and the polymer matrix plays a crucial role in the enhancement of the electroactive β phase and the dielectric properties of thin films. Strong interaction via hydrogen bonds between Ni(OH)2 NBs and the PVDF matrix is the main reason for enhancement in β phase crystallization and improved dielectric properties. The NC thin films can be utilized for potential applications as high energy storage devices like supercapacitors, solid electrolyte batteries, self-charging power cells, piezoelectric nanogenerators, and thin film transistors and sensors. [ABSTRACT FROM AUTHOR]

Published
2015
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44. Self‐Polarized ZrO2/Poly(vinylidene fluoride‐co‐hexafluoropropylene) Nanocomposite‐Based Piezoelectric Nanogenerator and Single‐Electrode Triboelectric Nanogenerator for Sustainable Energy Harvesting from Human Movements

Author

Saikh, Md. Minarul, Hoque, Nur Amin, Biswas, Prosenjit, Rahman, Wahida, Das, Namrata, Das, Sukhen, and Thakur, Pradip

Abstract

Piezoelectric nanogenerators (PENGs) have been emerged as one of the most promising approach for harvesting energy from the movement of living system for low‐power electronic devices. Herein, a simple PENG and single‐electrode triboelectric nanogenerator (STENG) are reported that execute tremendous output performance. In zirconium oxide (ZrO2)/poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) nanocomposite polymer, ZrO2acts as the nucleating agents for electroactive polymorph nucleation and also enhances the dielectric constant (≈23). Compared with previously reported PVDF‐HFP‐assisted prototype nanogenerators, this developed PENG exhibits excellent piezoelectric energy‐harvesting performance with very high power density, high energy conversion efficiency and high durability. The PENG exhibits a large value of open‐circuit voltage ≈120 V and short‐circuit current ≈1.95 μA under periodic finger imparting with high power density ≈7091 μW cm−3. Fabricated flexible PENG is capable to instantaneously light up commercially available 55 number of blue light emitting diode connected in parallel connection through bridge rectifier. High capacitor charging performance is also observed, such as 2.2 μF capacitor charged up to 3.5 V, in just 17 s time interval. Single‐electrode‐based TENG fabricated by this composite film also shows remarkable output voltage ≈7 V under finger touch. One of the most promising approaches for harvesting energy from the movement of living system for low‐power electronic devices is developed by fabricating two simple nanogenerators. Piezoelectric nanogenerator exhibits a voltage ≈120 V with current ≈1.95 μA under periodic finger imparting.

Published
2021
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45. Er 3+ /Fe 3+ Stimulated Electroactive, Visible Light Emitting, and High Dielectric Flexible PVDF Film Based Piezoelectric Nanogenerators: A Simple and Superior Self-Powered Energy Harvester with Remarkable Power Density.

Author

Hoque NA, Thakur P, Roy S, Kool A, Bagchi B, Biswas P, Saikh MM, Khatun F, Das S, and Ray PP

Abstract

The design of an energy-harvesting unit with superior output characteristics, i.e., high power density, is a great technological challenge in the present time. Here, simple, lightweight, flexible, and cost-effective piezoelectric nanogenerators (PENGs) have been fabricated by integrating the aluminum electrodes onto Er 3+ /Fe 3+ stimulated electroactive, visible-light-emitting, and large dielectric PVDF films in which ErCl 3 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O act as the catalytic agents for electroactive β polymorph nucleation and the enhancement of dielectric properties. The developed PENGs exhibit excellent energy-harvesting performance with very high power density and very fast charging ability compared with the previously reported PVDF-assisted prototype nanogenerators. The PENGs lead to very large power density (∼160 and ∼55.34 mW cm -3 ) under periodic finger imparting for Er 3+ - and Fe 3+ -stimulated PVDF-film-based energy-harvester units, respectively. The fabricated self-powered PENG is also able to light up 54 commercially available light-emitting diodes.

Published
2017
Full Text
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46. In situ synthesis of Ni(OH)2 nanobelt modified electroactive poly(vinylidene fluoride) thin films: remarkable improvement in dielectric properties.

Author

Thakur P, Kool A, Bagchi B, Hoque NA, Das S, and Nandy P

Subjects
Crystallization, Electric Impedance, Hydroxides chemistry, Nanocomposites chemistry, Nickel chemistry, Polyvinyls chemistry
Abstract

A facile and low cost synthesis of Ni(OH)2 nanobelt (NB) modified electroactive poly(vinylidene fluoride) (PVDF) thin films with excellent dielectric properties has been reported via in situ formation of Ni(OH)2 NBs in the PVDF matrix. The formation and morphology of the NBs are confirmed by UV-visible spectroscopy and field emission scanning electron microscopy respectively. A remarkable improvement in electroactive β phase nucleation (∼82%) and the dielectric constant (ε ∼ 3.1 × 10(6) at 20 Hz) has been observed in the nanocomposites (NCs). The interface between the NBs and the polymer matrix plays a crucial role in the enhancement of the electroactive β phase and the dielectric properties of thin films. Strong interaction via hydrogen bonds between Ni(OH)2 NBs and the PVDF matrix is the main reason for enhancement in β phase crystallization and improved dielectric properties. The NC thin films can be utilized for potential applications as high energy storage devices like supercapacitors, solid electrolyte batteries, self-charging power cells, piezoelectric nanogenerators, and thin film transistors and sensors.

Published
2015
Full Text
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