Nano-mechanics

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Footstep sensor based on piezoelectric nanogenerator transferring mechanical energy into electrical energy. 

Photo credit: Thor BalkhedZnO with its excellent electro-mechanical coupling properties is also being realized in our research on nanomechanics. Namely piezoelectricity based on ZnO nano-wires grown on different substrates is an active research area.

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.

nanomekanik, böjbar produktCritical 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%.

Nanomekanik, grafisk bildUtilizing these piezoelectric harvesters, we aim to develop self-powered systems (for different applications) relying on ambient low frequency mechanical energy available around us. 

 

nanomekanik, diagramPhoto with gloves above: The nano sensor is very thin and flexible.

Three illustrations below:

(1) The configuration of anisotropic self-powered directions sensor,

(2) a spontaneous response of both sides of the harvester, and

(3) the response of both sides for longer duration.

Nanomekanik, diagram

Human abundant energy powers transmitting sensors
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Human abundant energy powers transmitting sensors

Many of the mechanical motion form around us like, handwriting, foot pressure etc, can be used to gain useful electrical energy and signals. 

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