Applications of Metal–Organic Frameworks (MOFs) and Their Derivatives in Piezo/Ferroelectrics

Manjunatha, H.; Naidu, K. Chandra Babu; Kumar, N. Suresh; Pothu, Ramyakrishna; Boddula, Rajender

doi:10.1002/9781119651079.ch2

Cited by 6 publications

(3 citation statements)

References 107 publications

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“…The change of the electrical permittivity in a piezoelectric material is produced by strong deformations or high temperatures [42] and can be induced by exciting the material with a relatively high electric field, the converse piezoelectric effect producing the deformations needed. This physical behavior can be observed from the nonlinear state equations, since the tensor q jkλ in the D i equation modifies the total polarization, and this can be integrated into a unique term with the electrical permittivity as follows:…”

Section: Variation Of Mechanical and Electrical Propertiesmentioning

confidence: 99%

Stress–Charge Nonlinear Physical Description and Tensor Symmetries for Piezoelectric Materials

et al. 2023

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Nonlinear piezoelectric materials are raised as a great replacement for devices that require low power consumption, high sensitivity, and accurate transduction, fitting with the demanding requirements of new technologies such as the Fifth-Generation of telecommunications (5G), the Internet of Things (IoT), and modern radio frequency (RF) applications. In this work, the state equations that correctly predict the nonlinear piezoelectric phenomena observed experimentally are presented. Furthermore, we developed a fast methodology to implement the state equations in the main FEM simulation software, allowing an easy design and characterization of this type of device, as the symmetry structures for high-order tensors are shown and explained. The operation regime of each high-order tensor is discussed and connected with the main nonlinear phenomena reported in the literature. Finally, to demonstrate our theoretical deductions, we used the experimental measurements, which presented the nonlinear effects, which were reproduced through simulations, obtaining maximum percent errors for the effective elasticity constants, relative effective permittivity, and resonance frequencies of 0.79%, 2.9%, and 0.3%, respectively, giving a proof of the potential of the nonlinear state equations presented for the unifying of all nonlinear phenomena observed in the piezoelectric devices.

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Section: Variation Of Mechanical and Electrical Propertiesmentioning

confidence: 99%

Stress–Charge Nonlinear Physical Description and Tensor Symmetries for Piezoelectric Materials

et al. 2023

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“…However, MOFs are versatile materials because of their physical, chemical, and structural tunability, excelling in chemical applications. Conversely, MOFs also reveal prospective scope in the futuristic electronic, [ 10–13 ] ferromagnetic, [ 14 ] electrolytic, [ 15 ] piezoelectric, [ 16 ] ferrorelectric, [ 16 ] photonic, [ 17 ] photovoltaic device applications. Indeed, the next‐generation electronic device applications require high‐quality semiconducting materials, [ 18 ] ferroelectric materials, [ 19 ] ferromagnetic materials, [ 20 ] and compatible high‐κ dielectrics.…”

Section: Introductionmentioning

confidence: 99%

“…

piezoelectric, [16] ferrorelectric, [16] photonic, [17] photovoltaic device applications. Indeed, the next-generation electronic device applications require high-quality semiconducting materials, [18] ferroelectric materials, [19] ferromagnetic materials, [20] and compatible high-κ dielectrics.

…”

mentioning

confidence: 99%

Nanoscale Probing of Surface Charges in Functional Copper‐Metal Organic Clusters by Kelvin Probe Force Microscopy for Field‐Effect Transistors

Kumar

Gupta

Sharma

2021

Adv Materials Inter

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Metal–organic frameworks (MOFs) have recently attracted a great deal of attention especially as conceivable advanced gate dielectrics for next‐generation field‐effect transistors (FETs) and memory device applications. Dielectric surface charge retention mapping is essential for gauging the leakage current and threshold voltage stability. Due to a dearth of systematic real‐time surface charge probing of MOFs dielectrics, in this work, the nanoscale Kelvin probe force microscopy (KPFM) technique is employed for the contact potential difference (CPD) analysis of developed hybrid copper–metal–organic clusters (Cu‐MOCs)/Si systems. Films are synthesized through the sol‐gel process consisting of copper metal core linked with organic ligands. With 3V positive and negative DC bias, charge injection offset between positive and negative bias is observed to be ≈190 mV, indicating the intrinsic Fermi level alignment between KPFM tip and sample surface charges. The high‐resolution surface CPD mappings bring forth the white (≈98 mV) and black (≈−91 mV) contrast profiles with hole (5.09 × 1012 cm−2) and electron (4.74 × 1012 cm−2) charge densities. Also, the 17 h time‐lapse enables the holes and electrons CPD mapping diameter shrinkage by ≈32% and 46%, respectively. In furtherance, a conductive filament model for host‐guest proton‐assisted conduction with charge hopping through fixed/mobile ions is proposed.

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A comprehensive investigation on metal–organic framework based poly(vinylidene fluoride) composites as piezoelectric nanogenerators

Adaval,

Aishwarya,

Kamble

et al. 2024

Polymer Composites

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Copper based metal–organic frameworks (Cu‐MOF) incorporated poly(vinylidene fluoride) (PVDF) composites were processed using drop casting, with different concentrations of Cu‐MOF (0.15–2 wt.%). Ultrasonication and centrifugation of Cu‐MOF particles were adopted as pre‐processing steps to ensure effective de‐agglomeration of the Cu‐MOF particles. The formation of polar β‐crystalline phase in PVDF/Cu‐MOF composite was confirmed by the morphological observation of fibrillar microstructure and the manifestation of specific absorption bands via spectroscopic analysis. Further, FTIR and NMR spectroscopic analyses unequivocally established the interfacial interactions between Cu‐MOF particles and PVDF dipoles. A maximum of ~92% polar fraction and ~25 pm/V d33 was obtained in PVDF composite of 1 wt.% of Cu‐MOF. Dielectric and ferroelectric investigations were carried out to relate the improvement of the interfacial polarization. Moreover, energy harvesting devices were fabricated from PVDF/MOF composites and a maximum rectified piezoelectric voltage of ~40 V was recorded during finger tapping experiment in PVDF/MOF composite of 1 wt.% Cu‐MOF. Further, a load current and maximum volumetric power density of 7.5 μA and ~1.2 mW/cm3, respectively, were achieved. The usage of the fabricated device as an energy harvester was further established by charging and discharging different capacitors and illuminating LEDs.Highlights Cu‐MOF (0.15–2 wt.%) incorporated PVDF composites were processed by solution casting. A maximum of ~92% polar fraction was obtained in PVDF/1MOF composite. A maximum rectified output voltage of ~40 V was recorded in PVDF/1MOF composite. A higher power density (1.2 mW/cm3) and load current (7.5 μA) were achieved for PVDF/1MOF. The usage of the fabricated device as an energy harvester was further established.

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Applications of Metal–Organic Frameworks (MOFs) and Their Derivatives in Piezo/Ferroelectrics

Cited by 6 publications

References 107 publications

Stress–Charge Nonlinear Physical Description and Tensor Symmetries for Piezoelectric Materials

Stress–Charge Nonlinear Physical Description and Tensor Symmetries for Piezoelectric Materials

Nanoscale Probing of Surface Charges in Functional Copper‐Metal Organic Clusters by Kelvin Probe Force Microscopy for Field‐Effect Transistors

A comprehensive investigation on metal–organic framework based poly(vinylidene fluoride) composites as piezoelectric nanogenerators

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