Roll‐to‐Roll (R2R) Production of Large‐Area High‐Performance Piezoelectric Films Based on Vertically Aligned Nanocolumn Forests

Abstract

The recent advances in flexible piezoelectric technologies have sparked a great interest in developing multifunctional next‐generation transducers, which are in high demand for various challenging applications. Here, novel quasi 1–3 piezoelectric films with record‐high piezoelectric voltage coefficients (g33), reaching up to 0.709 Vm N−1, ≈20% greater than the recently reported highest g33 value in the literature, are reported. These composites are constructed via dielectrophoretic alignment of lead zirconate titanate (PZT) particles enhanced by graphene nanoplatelets, leading to densely structured cone‐shaped nanocolumn forests in the thickness direction. To demonstrate its potential applications, both structured and randomly dispersed samples are characterized and used in various applications ranging from energy harvesting to structural and personal health monitoring. Furthermore, when placed on the sensor surface, the oriented piezoelectric films are shown to detect even the slight movements of a small‐sized insect, demonstrating the ultrasensitivity of the system. Finally, to show the scalability of the dielectrophoretic process, a large area sample (12 ft long and 6‐in.‐wide) is also produced continuously via a novel multifunctional custom designed roll‐to‐roll manufacturing line. To the best of the knowledge, this is the largest single piece of piezoelectric film ever reported in the literature.

Plant-Derived Antiviral Compounds as Potential Entry Inhibitors against Spike Protein of SARS-CoV-2 Wild-Type and Delta Variant: An Integrative in SilicoApproach

“…The compounds selected belonged to different phytochemical categories like alkaloids, terpenoids, polyphenols, and flavonoids. The two/three-dimensional conformers of the small molecules in the chosen ligand set were downloaded from the NCBI PubChem-Compound database [ 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ] in SDF format, and were subsequently converted to PDB format using the OpenBabel chemical file format converter [ 55 ].…”

Boosting Performance of Self-Polarized Fully Printed Piezoelectric Nanogenerators via Modulated Strength of Hydrogen Bonding Interactions

“…However, piezoelectric nanogenerators (PENGs) [ 8 ] have attracted substantial interest due to its high efficiency of converting various forms of abundant irregular mechanical energy into useful electric energy, such as vehicle movements, human body motion, water flow and acoustic waves [ 8 , 9 , 10 , 11 , 12 ]. Furthermore, printing technologies in the fabrication areas of piezoelectric devices are undergoing substantial development due to their ability to be quickly molded for manufacturing structures with any design or shape in a low-cost, single-step and efficient manner [ 13 , 14 ]. To date, an enormous number of studies and continuous progress have attempted to improve the performance of PENGs using various materials [ 14 , 15 , 16 ].…”

“…Furthermore, printing technologies in the fabrication areas of piezoelectric devices are undergoing substantial development due to their ability to be quickly molded for manufacturing structures with any design or shape in a low-cost, single-step and efficient manner [ 13 , 14 ]. To date, an enormous number of studies and continuous progress have attempted to improve the performance of PENGs using various materials [ 14 , 15 , 16 ].…”

Prediction on the relative permittivity of energy storage composite dielectrics using convolutional neural networks: A fast and accurate alternative to finite-element method

“…T he permittivity is an essential parameter to characterize the tendency and ability of the local migration of atomic charges in the material under an external electric field. The magnitude of permittivity significantly affects the dielectric performance of the material in many applications, such as capacitive energy storage [1,2] , electro-elastomers [3,4] , triboelectric nanogenerators [5] , piezoelectric sensors [6] , flexible electronics technology [7] , and insulating packaging [8] . For capacitive energy storage applications, polymer material with higher permittivity is desirable to improve the energy storage density of capacitive film, according to the relationship between permittivity and energy storage density for linear dielectrics [9] ,…”