Why the world needs to rethink the technology of electric vehicles
Electron shielding, or EM shielding, is a technology that prevents electromagnetic interference from damaging electronics and electrical components.
It was invented by German physicist Thomas Hölderlin in the 1950s, but the technology has remained largely unknown in the West, even though the technology was used to shield radio equipment in the 1970s.
But, in 2017, Höldens group at the Max Planck Institute for Chemistry and Biophysics in Germany demonstrated that it could be used to keep electronic components from melting.
It is a key part of the technology used in electric vehicles, and the concept of electric cars will be discussed at a future International Electron Workshop in Hamburg.
“Electromagnetic interference” refers to the interference of electromagnetic waves from the sun, a phenomenon known as solar wind.
Electromagnetic waves interfere with electrical signals and cause a voltage drop in a circuit.
A device is said to have “electromagnetic field” if it has an electromagnetic field that can be detected and measured.
For this reason, EM shielding can be used in electrical equipment.
“When the signal is being transmitted, we don’t have any electrical components in the circuit,” said physicist Martin Heuer, head of the Department of Applied Physics at the University of Bonn, Germany.
“Therefore, EM is the only way to keep the signal intact.
Electrons are everywhere, in all the parts of the electronic circuit.”
In the early 2000s, Hälderlin and his colleagues created a new kind of semiconductor by adding a material that is very weak in electron density to an existing semiconductor.
They used a method called superposition, where two electrons are placed side by side, so that when one is put into the other, the latter becomes supercharged.
“It is very hard to tell the difference between electrons in the two sides of the semiconductor,” said Heuer.
But if you are talking between two semiconductors, it’s very difficult to tell.” “
If we are talking about a single electron, it is very easy to tell if the two electrons in a semiconducting material are the same or not.
But if you are talking between two semiconductors, it’s very difficult to tell.”
This is where Höller and his team from the Maxplanck Institute came up with the idea of using EM shielding to protect the electronic components.
They wanted to see whether the new material could prevent the electronic signal from melting in a case where the two ends of the circuit were not connected, like a radio transmitter or computer.
Electron shields The researchers wanted to use a material called polyacrylonitrile (PAN) to protect two parts of a circuit from an electromagnetic interference.
“In the past, the semiconductivity of a material has been measured, but we have not yet been able to measure the thickness of a PAN in a transparent material,” said Matthias Reutinger, who works at the research institute.
“We also needed to know how long the material lasts in the environment.
They then used an electron beam to measure an electrical signal in the semicap of a second transistor, which was connected to a second chip. “
The researchers used a high-performance liquid crystal display (LCD) to measure a voltage in a single transistor in a transistors’ field of EM.
They then used an electron beam to measure an electrical signal in the semicap of a second transistor, which was connected to a second chip.
The electron beam measured the voltage, and then they measured the signal on the second chip.”
The results showed that the material, which is made of a very thin layer of PAN, could protect the device from electromagnetic interference even if the semicop is not connected.
“This is very promising because it shows that we have a material to protect electronic components,” said Höiler.
“There is an enormous potential in EM shielding.”
Heuer added that the new research has also been able in the future to use EM shielding for other applications.
“By now, we know that the semicamps of other devices are affected by electromagnetic interference, so the new finding provides another way to protect these devices from damage,” he said.
The work by the Max Institute for Science in Berlin, and by the Institute for Electromaterials Research of the University at Bonn in Germany, was published in Nature Communications on Thursday.
The study was funded by the European Union’s Seventh Framework Programme, under the Horizon 2020 programme, and was carried out under the supervision of the Max-Planck Institute’s Institute for Materials Science and Engineering, and of the Helmholtz-Zentrum für Informatik für Technologie in Berlin.
Al Jazeera’s Zakia Javid contributed to this report.