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Flexible Piezoelectric Nanogenerator Composed of Electrospun Nanofibrous Web
Published in Prashansa Sharma, Devsuni Singh, Vivek Dave, Fundamentals of Nano–Textile Science, 2023
S. Wazed Ali, Satyaranjan Bairagi
Piezoelectricity is a property of the materials which can be used for generating electric charge when the respective materials are subjected to a mechanical stress or vice-versa (Kim et al., 2011). In the year 1880, Curie brothers first established this piezoelectric property in Rochelle salt (Curie and Curie, 1880). Thereafter, many researches have been carried out in the field of piezoelectricity. This approach is one of the most important findings to reduce the environmental pollution made by fuel energy, by harvesting various mechanical energies available in our surroundings. Mechanical energy is one of the most abundant energies among the other energies (thermal and solar energy) which can be available in different forms such as wind energy, vibration energy, energy due to the human body movement, and so on (Fan et al., 2016; Wang and Wu, 2012). These wastage energies can be harvested in terms of useful electrical energy through the piezoelectric materials. This also needs to be mentioned that piezoelectric technology has enhanced capability to generate high energy density as compared to other energy harvesting technologies (triboelectric, pyroelectric, electromagnetic, etc.) (Khalifa et al., 2019).
Nanogenerator Based Self-Powered Sensors for Healthcare Applications
Published in Suresh Kaushik, Vijay Soni, Efstathia Skotti, Nanosensors for Futuristic Smart and Intelligent Healthcare Systems, 2022
Gaurav Khandelwa, Pandey Rajagopalan, Nirmal Prashanth Maria Joseph Raj, Xiaozhi Wang, Sang-Jae Kim
Piezoelectric was discovered in the late 19th century by the Curie brothers upon hitting a quartz crystal (Kim et al. 2009, Rajagopalan et al. 2018, Richter et al. 2009). Piezoelectricity is the materials’ ability to produce charge (or voltage) when stimulated by mechanical stress. This is due to non-inversion symmetry in the crystal lattice, which disrupts on account of strain, thus generating a dipole. The piezoelectric effect can be clarified utilizing a molecular model where the lattice is in an equilibrium state. Once an external force is applied upon the material, the lattice distorts, displacing the charge center. This results in the formation of a small dipole.
Piezoelectrical Materials for Biomedical Applications
Published in Jince Thomas, Sabu Thomas, Nandakumar Kalarikkal, Jiya Jose, Nanoparticles in Polymer Systems for Biomedical Applications, 2019
M. S. Neelakandan, V. K. Yadu Nath, Bilahari Aryat, K. A. Vishnu, Jiya Jose, Nandakumar Kalarikkal, Sabu Thomas
The discovery of piezoelectric effect has revolutionized material science. Piezoelectric materials can produce electricity in response to even minute mechanical deformations. When these materials are subjected to external mechanical stress, the positive and negative charges in the material undergo an asymmetric reorganization; this results in electrical polarization inside the material. This phenomenon is first observed and explained by Pierre and Jacques Curie in 1880.1 They extensively studied piezoelectricity in materials like crystals of tourmaline, quartz, topaz, cane sugar, and Rochelle salt. Initial studies showed that quartz and Rochelle salt have most piezoelectric ability at that time (Fig. 6.1).
A Novel Islanding Detection Technique Based on Piezoelectric Sensors for Grid-Integrated DG Systems
Published in IETE Journal of Research, 2021
Shreeram V. Kulkarni, Vasudha Hegde, Dattatraya N. Gaonkar
Piezoelectric sensors usually explore applicability in automotive, biomedical, and aviation design. These sensors can be scaled down and there will be no need for an external power supply. The piezoelectric sensors are exceptionally sensitive with great execution and these sensors can be produced on the large scale. For these types of sensors, the diaphragm is an imperative factor so the design should be perfect and reliable. For this reason, we can be designing these sensors with Finite Element Modeling (FEM). The FEM is utilized to look at the sensor boundary parameters in terms of their dynamic performance (stress, deflection, strain distribution, and natural frequency) [4]. The layout and its fabrication are of centered exploration to increase the sensitivity and optimizing the voltage produced and natural frequency in the required range, and in expanding the transmission capacity by various assembling advancements like mass and surface micromachining. [5,6]. These piezoelectric sensors operate on the rule of piezoelectricity, in which charge generation happens when the diaphragm deflects because of applied pressure. The more slender the diaphragm, the better deflection, and more sensitivity can be accomplished. In any case, under varying frequencies, the defection of the sensor diaphragm depends on the shape and the dimensions.
Hygro-thermo-electro-mechanical bending analysis of sandwich plates with FG core and piezoelectric faces
Published in Mechanics of Advanced Materials and Structures, 2021
Ashraf M. Zenkour, Rabab A. Alghanmi
The applications of piezoelectric materials have been significantly increasing in latest years because of their fast dynamic response, flexibility, consuming low power, and useful response to normal and shear deformations. Piezoelectric material become electrically charge when it is subject to mechanical stress, an effect called direct piezoelectricity. Conversely, it produces a mechanical deformation when applying an electric voltage. The development of lightweight constructions composed of advanced composite materials with piezoelectric layers as sensors and actuators has enormous potential in shipbuilding, automotive and aerospace. The advantages of direct and conversational piezoelectric influences, piezoelectric sheets can be applied to control the shape, bending and buckling or to alleviate transitory vibration and structural noise.
Ferroelectric, Piezoelectric Mechanism and Applications
Published in Journal of Asian Ceramic Societies, 2022
Arun Singh, Shagun Monga, Neeraj Sharma, K Sreenivas, Ram S. Katiyar
Piezoelectricity is the potential of specific crystalline materials to generate an electric charge proportionate to the applied mechanical stress. This is the direct effect of piezoelectricity. It was observed by the Curie brothers in 1880. Conversely, on applying an electric field along particular directions in a piezoelectric crystal, the crystal is strained by an amount proportionate to the applied electric field. This is called the converse effect of piezoelectricity. If the resulting strain varies as the square of the field function, it is acknowledged as the electrostrictive effect.