Plant-Mediated Biological Synthesis of ZnO Nanoparticles using Albizia Richardiana Seed Extract for Sensing Application

The main objective is to select a piezoelectric material which is pure and eco-friendly to fabricate the pressure sensor and also adopt an appropriate method for the synthesis of the piezoelectric material. The synthesized piezoelectric material is studied using various characterization techniques. Piezoelectric pressure sensor should be fabricated using the synthesized piezoelectric material. Zinc Oxide (ZnO) is chosen for the fabrication of the pressure sensor because of its piezoelectric property and eco-friendly nature. It generates current under an external mechanical stress due to its wide band gap. The generated current will vary linearly with external pressure. ZnO is synthesized using seeds of Albizia Richardiana by green synthesis method in less amount of time. The synthesized ZnO is studied using the characterization techniques like Fourier Transform Infrared (FTIR), Scanning electron microscopy (SEM) and Ultraviolet-Visible (UV-Vis) spectrometer. The piezoelectric sensor is fabricated by sand wiching the synthesized ZnO between two copper electrodes. The fabricated sensor is subjected to various loads and the generated current is measured using Keithley 2450 instrument.