comment on this article

Revolutionary material for future electronics

Vanadium dioxide (VO2) may stand to revolutionise the way in which we control the flow of electrons through a circuit.

VO2 is said to act like an insulator at room temperature, while behaving like a conductor at temperatures of more than 68°C. It is this characteristic, known as metal-insulator transition, that is being explored in an EU Horizon 2020 project called Phase-Change Switch.

Following a challenging selection process, EPFL has been chosen to coordinate the project, which has been granted €3.9million of EU funding. The potential for this new technology has attracted a range of interested parties.

Although the electronic properties of VO2 have been known for a while, scientists have been unable to explain them until now.

The atomic structure of VO2 is said to change as the temperature rises, transitioning from a crystalline structure at room temperature, to a metallic one at temperatures of more than 68°C, which occurs within less than 1ns.

"VO2 is also sensitive to other factors that could cause it to change phases, such as by injecting electrical power, optically, or by applying a THz radiation pulse," said professor Adrian Ionescu, from EPFL.

Unlocking VO2’s full potential has proved tricky because its transition temperature of 68°C is too low for modern electronic devices. However, two EPFL researchers have found the addition of germanium to VO2 film can lift the material's phase change temperature to more than 100°C.

For the first time, scientists claim they can make ultra-compact, modulable frequency filters. The technology also uses VO2 and phase-change switches and, according to the team, is particularly effective in the frequency range crucial for space communication systems (the Ka band, with programmable frequency modulation between 28.2 and 35GHz).

The hope is that these discoveries will spur further research into applications for VO2 in ultra-low-power electronic devices.

In addition to space communications, the team are also looking at other fields such as, neuromorphic computing and high-frequency radars for self-driving cars.

Bethan Grylls

Comment on this article

This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Signs of life

Since Galvani discovered the effect of electricity on frogs’ legs more than two ...

Deep fools

In not much more than a decade, deep learning has moved from a research ...

Innovation unbound

Earlier this month the Consumer Electronics Show (CES) took place in Las Vegas, ...

Ethernet bridge IC

Toshiba Electronics Europe has unveiled the TC9562 series, the latest member in ...

Gold-plated posts

Responding to a growing demand from high-end audio and precision ...

Custom MMIC design

Plextek RFI CEO Liam Devlin discusses the technical and commercial ...

A racing certainty

AI has shaken the automotive industry to its core, inspiring a revolution. ...

Sourcing components

Since the launch of the Model 3, Elon Musk has been under significant pressure ...

Planning pays off

Described as a one-stop shop Plexus provides companies with engineering, ...

Teach them to fish

Last year was dubbed the “worst ever” by the Online Trust Alliance for data ...