After the careful growth of special vertical well aligned ZnO nanowires, mechanical properties are being investigated using different techniques, among which nano-indentation has been used the most frequently.
Critical force that a single nano-wire can withstand is carefully investigated to understand the mechanical applied force limits of our nano-wires before using it as piezoelectric components.
This is then followed by the design of the electro-mechanical device based on these nano-wires. Indeed this is another challenging task. Our aim is develop a nano-generator which provides an efficiency of at least 30%.
Utilizing these piezoelectric harvesters, we aim to develop self-powered systems (for different applications) relying on ambient low frequency mechanical energy available around us.
Figures and pictures:
Electroluminescence spectrum of a ZnO nanowires/p-GaN LD. The inserts show a cross-sectional SEM of the LED and a digital photograph displaying the emitted light for forward and reverse biases.