Power from the thermal motion of graphene circuits at room temperature, potentially gives us a clean future source of limitless energy for small devices.

Scientists have been able to draw power from the thermal motion of graphene circuits at room temperature, potentially giving us a clean future source of limitless energy for small devices.

The approach cleverly harnesses both the nanometre-sized rippling and the Brownian motion – random movement of particles – found in graphene, producing an electric current that could be put to a variety of uses.

“An energy-harvesting circuit based on graphene circuits could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors,” says physicist Paul Thibado, from the University of Arkansas.

The research draws on previous work from the same lab, in which freestanding graphene was shown to ripple and buckle in a way that could be harvested for energy.

“The origin of these nanometre-sized ripples is still an open question,” the team writes in their study, noting that the graphene ripple seems to stem from subatomic particle interactions in the material.

A crucial part of the development of their system was using two diodes in the circuit to convert the original alternating current (AC) into direct current (DC). This allowed the current to flow both ways through the circuit, along separate paths.

The end resulting is a pulsing DC current that can perform work on a load resistor, and potentially power up small electronic devices. Another finding was that the two-diode design of the system helped to boost the amount of power delivered.

“We also found that the on-off, switch-like behaviour of the diodes actually amplifies the power delivered, rather than reducing it, as previously thought,” says Thibado.

“The rate of change in resistance provided by the diodes adds an extra factor to the power.”

What the research shows is a symbiotic setup between the graphene and the circuit, one which avoids conflicting with the second law of thermodynamics by maintaining one uniform temperature so that heat isn’t transferred. The current flowing in the resistor doesn’t heat it up, in other words.

This part of the research owes a lot to stochastic thermodynamics, a relatively new field of study looking at how the macro and the micro interact in systems when it comes to the interplay of energy and heat.

The slow motion of the graphene means that current is induced in the circuit at low frequencies, and that’s important for efficiency.

The next challenge will be working out how the system might be deployed and used in something practical – firstly by figuring out if the energy can be stored in a capacitor for later use.

While the energy produced by freestanding graphene is likely to be quite small, it could one day be a replacement for low-power batteries – and it wouldn’t need recharging or replacing. Anything that gets us towards a clean, renewable energy future is always a welcome development, no matter how small.

Tsinghua University Chinese Government Scholarship Is Accepting Applications For A Master & Ph.D. To Study Tsinghua University, China Tsinghua University

Source: https://www.technologytimes.pk/2020/10/07/graphene-circuits-can-produce-clean-and-limitless-energy/

Graphene, Energy, Physics, Atom

World news – US – Graphene Circuits Can Produce Clean And Limitless Energy

Building on its expertise in the areas of digital, technologies and processes , CSS Engineering you in your most ambitious transformation projects and helps you bring out new ideas, new offers, new modes of collaboration, new ways of producing and selling.

CSS Engineering is involved in projects each customer as if it were his own. We believe a consulting company should be more than an advisor. We put ourselves in the place of our customers, to align we incentives to their goals, and collaborate to unlock the full potential their business. This establishes deep relationships and enjoyable.

Our services:

  1. Create professional websites
  2. Hosting high performance and unlimited
  3. Sale and video surveillance cameras installation
  4. Sale and Installation of security system and alarm
  5. E-Marketing

All our achievements here https://www.css-engineering.com/en/works/


Please enter your comment!
Please enter your name here