What Is An Nanogenerator

Nanogenerators are devices that convert mechanical energy into nanoscale electrical energy and are the world's smallest generators.

There are three types of nanogenerators: piezoelectric nanogenerators, friction nanogenerators and thermoelectric nanogenerators. Currently, scientists are working on friction nanogenerators, which use friction to convert mechanical energy into electricity. Among the three types of nanogenerators, friction nanogenerators have good performance and wide selection of materials.

Tribological nanogenerators are actually made by rubbing two different materials together. When one moves to the left and the other moves to the right, one becomes positive and the other becomes negative. If the two pieces are connected by an external circuit, the positive and negative charges discharge. An electric current is generated in an external circuit to generate electricity.

Characteristics of nanogenerators

Nanogenerators made of polymers and metals can be made lightweight and wearable. It can not only power portable wearable devices, but also directly serve as a sensor to provide wearable devices with some real-time human health data.

Nanogenerators can be made very small or very large. What if we built a series of nanogenerators and put them in the ocean to absorb the energy of the waves. An ocean 200 kilometers long and 200 kilometers wide generates as much electricity as the Three Gorges Dam. If an area the size of Shandong could generate enough electricity to power all of China's current needs.

Flexible material selection range

All kinds of polymer materials, metal materials, and even flowers, leaves and trees can be made into nanogenerators.

What could nanogenerators do in the future?

Nanogenerators are embedded in the sole of a shoe, and global positioning devices integrated into the sole are powered by energy generated by movements such as running and walking. Even without a battery, the location of the wearer can be provided in real time. Such shoes can be provided for the elderly and children to wear, always know their location, not afraid of getting lost.

A nanogenerator placed in the heart collects energy generated by human movement and the beating of the heart to charge the pacemaker. This can solve the problem that pacemakers need to run for about eight years to replace the battery once.

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