Biosynthesis of thin film derived from microbial chitosan for piezoelectric application

Piezoelectric thin-film superlattices without using piezoelectric materials

In this paper we show that experimentally realizable apparently piezoelectric thin-film superlattices can be created from nonpiezoelectric materials provided an odd-order e.g., trilayer stacking sequence is used. The size-dependent mechanism of flexoelectricity, which couples gradients of strain to polarization, allows such a possibility. We present closed-form analytical expressions for the re...

Shear Mode Piezoelectric Thin Film Resonators

1.1 Shear mode bulk acoustic wave devices and sensors Acoustic microsensor technique, well known as QCM (Quartz crystal microbalance) or TSM (Thickness shear mode) sensor, is an effective method to detect small mass loading on the sensor surface. This sensor can be operated even in liquid by using shear mode resonance. Therefore, shear mode piezoelectric film resonators are attractive for liqui...

Cytotoxicity of Chitosan Derived from Shrimp for Bone Scaffold on Adipose Tissue-Derived Mesenchymal Stem Cells

Thin-Film Process Technology for Ferroelectric Application

Recently thin-film ferroelectrics such as Pb(Zr, Ti)O3 (PZT) and (Ba, Sr)TiO3 (BST) have been utilized to form advanced semiconductor and electronic devices including Ferroelectric Ran‐ dom Access memory(FeRAM), actuators composing gyro meters, portable camera modules, and tunable devices for smart phone applications and so on. Processing technology of ferro‐ electric materials is one of the mo...

Analog tunable gratings driven by thin-film piezoelectric microelectromechanical actuators.

We present a microfabricated grating whose period can be tuned in analog fashion to within a fraction of a nanometer. The tunable angular range is more than 400 microrad in the first diffracted order. The design concept consists of a diffractive grating defined onto a 400-nm membrane, with the membrane subsequently strained in the direction perpendicular to the grating grooves by thin-film piez...