The use of acoustic resonators for sensors application has opened a new branch in research and applications of piezoelectric materials and devices. The first generation of such sensors is constituted by the quartz crystal microbalance (QCM) based on AT-cut mono-crystalline quartz. High sensitivities of gravimetric sensing in both air and liquids were demonstrated. Since the 1980s, when the firs...

The necessity to continuously and seamlessly monitor human health is calling for compliant, comfortable, safe wearables. employment of piezoelectric biopolymers in form thin film perfectly matches with these needs due their inherent flexibility, sensitivity, biocompatibility. Among them, chitosan a low cost, highly sustainable, biocompatible material great potential applications compliant Howev...

The effect of heteroepitaxy-induced constraint on the structure and piezoelectric properties of the relaxor ferroelectric lead magnesium niobate–lead titanate ~PMN–PT! were investigated. Relaxor PMN–PT epitaxial thin films with oxide electrodes were grown by pulsed-laser deposition on ~100! LaAlO3 substrates. We observe a systematic decrease in the phase transition temperature ~temperature at w...

Because the functions of polar materials are governed primarily by their polarization response to external stimuli, the majority of studies have focused on controlling polar lattice distortions. In some perovskite oxides, polar distortions coexist with nonpolar tilts and rotations of oxygen octahedra. The interplay between nonpolar and polar instabilities appears to play a crucial role, raising...

Large piezoelectric effect in nonlinearly graded lead-free ferroelectric thin films In article number 2100370, using extended phase field simulations, Le Van Lich and co-workers demonstrate that a large can be obtained film. The enhancement of property originates from the gradient electrical polarization, which makes polarization more susceptible to external excitation.

Title of Dissertation: GROWTH AND CHARACTERIZATION OF MULTIFERROIC BATIO3-COFE2O4 THIN FILM NANOSTRUCTURES Haimei Zheng, Doctor of Philosophy, 2004 Dissertation Directed By: Professor Lourdes Salamanca-Riba Professor Ramamoorthy Ramesh Department of Materials Science and Engineering Multiferroic materials which display simultaneous ferroelectricity and magnetism have been stimulating significan...

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copper thin films with nano-scale structure have numerous applications in modern technology.  in this work, cu thin films with different thicknesses from 50–220 nm have been deposited on glass substrate by dc magnetron sputtering technique at room temperature in pure ar gas. the sputtering time was considered in 4, 8, 12 and 16 min, respectively. the thickness effect on the structural, morpholo...