Is it Possible to Charge a Mobile Phone via Wi-Fi

MIT University physicists have announced that they have prepared a blueprint for a device that powers many household electronics by converting terahertz wavelengths, commonly called T-rays, into direct current.

The design uses the quantum mechanics of the carbon material graphene, or atomic movement. Scientists have discovered that when graphene is combined with other materials, graphene electrons move in a certain direction. The material they use is boron nitride.

The team published the findings in the journal Science Advances and is working with experimental scientists to make the design a physical device.

“We are surrounded by electromagnetic waves in the terahertz range,” said Dr. Hiroki Isobe of the MIT Materials Research Institute. “If we can turn that energy into an energy source for everyday use, it will help us solve the energy problems we face,” he said.

Break the symmetry of graphene

Instead of converting electromagnetic waves into direct current by applying an external electric field to the converter, Dr. Isobe wondered if it is possible to induce electrons in the material itself to flow in one direction to induce T-rays into direct current at the quantum mechanical level. .

For electrons to flow without dispersing the irregularities of the material, the material must be very clean or free of impurities. He thought graphene was the ideal ingredient.

To induce graphene electrons to flow in one direction, we need to induce “inversion,” which physicists say, breaking the inherent symmetry of matter. In general, graphene electrons feel the same force between them, which means that the incoming energy scatters electrons symmetrically in all directions. Isobe found a way to break the inversion of graphene and induce an asymmetric electron flow in response to incoming energy.

From the literature, he discovered that others experimented with placing graphene on a honeycomb lattice layer of boron nitrate. Other scientists have found that in this case, the force balance between graphene electrons is broken. Electrons close to boron feel a constant force, while electrons close to nitrogen experience different pulls. In this process, electrons are distorted without moving in one direction.

Dr. Isobe found that such distortions gathered in one place to produce direct current if graphene was relatively pure. If there are too many impurities in the graphene, the impurities will act as an obstacle in the path of the electron cloud, causing the clouds to scatter in all directions rather than moving as one.

Installation of antennas that collect terahertz waves

The researchers also found that the stronger the incoming T-ray energy, the more energy it can convert to direct current. This means that the T-ray must include a method of focusing the T-ray before entering the converter.

So, the team additionally placed antennas to collect and focus the T-rays, and devised a terahertz rectifier blueprint.

The team has filed a patent for a new “high-frequency rectification” design and is working with MIT experimental physicists to develop a physical device capable of working at room temperature.

If so, it can be used in many portable applications. For example, it is expected that the implant in the patient’s body can be wirelessly powered without surgery to replace the implant battery. Peripheral WiFi signals can be converted to charge personal electronic devices such as laptops or cell phones.

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Summary

MIT University physicists have announced that they have prepared a blueprint for a device that powers many household electronics by converting terahertz wavelengths, commonly called T-rays, into direct current.

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