Scientists are developing a device that can transform WiFi signals into electricity
US and Spanish scientists have developed a flexible device that can turn Wi-Fi signals into electricity to power electronic devices, portable devices, and medical devices.
The study, which was first published in Nature, describes a fully flexible radio frequency antenna that can convert AC electromagnetic waves to DC power.
Antenna is made of a new two-dimensional rectifier called molybdenum disulphide (MoS2), which is just the thickness of three atoms, making it one of the best semiconductors in the world.
According to a study, when AC signals, including Wi-Fi, move to a semiconductor, they become a DC voltage that can work with circuits or charge batteries.
In addition, the device is flexible, so it can cover very large areas such as building surfaces.
"We have developed a new way to improve future electronic systems by collecting Wi-Fi power in a way that is easy to integrate in large areas," said Professor Tom Palacios of the Institute de Tenera. Massachusetts (MIT).
In the experiments, the device can produce about 40 microswitches if they are exposed to a typical power level of about 150 microliters of Wi-Fi signals. Enough to illuminate a simple mobile screen or silicon chips.
Most of the previously reported elastic rectifiers cannot operate at low frequencies, so, according to researchers, they cannot capture and convert the gigahertz frequencies used by the mobile phone and Wi-Fi signals.
But the MoS2 material is much faster in signal conversion and allows you to capture and convert up to 10 gigahertz wireless signals.
The maximum output efficiency of the current device is 40 percent, depending on the Wi-Fi input power. According to a study at typical Wi-Fi power level, the energy efficiency of the MoS2 rectifier is about 30 percent.
In addition, the device can be used to operate implantable medical devices as it does not release toxic lithium.
"It is much better to collect energy from the environment to feed these small laboratories into the body and transfer data to external computers," said Jesus Graja, a researcher at the Madrid Technical University.