Feeds

Optical computing a step closer with SINGLE-MOLECULE LED

Strasborg boffins flash their light-emitting nanowire

SANS - Survey on application security programs

Researchers at IPCMS in Strasbourg, working with a team from the Institut Parisien de Chimie Moléculaire (CNRS/UPMC), have produced an LED that consists of a single molecule.

While it's unlikely ever to serve as a display, the molecular LED is an important step forward in miniaturising components to provide optical communications in molecular-scale computing, the researchers say.

To create the single-molecule LED, the group used a wire made of a substance that's already used in commercial LEDs, namely polythiophene, a compound of hydrogen, carbon and sulphur. One end of the polythiophene wire was attached to a scanning electron microscope, and the other end to a gold surface.

When a current was passed through the nanowire, it acted like all good LEDs and emitted photons. One photon was emitted for every 100,000 electrons injected into the wire, and the light it emitted was in the red range.

Nanowire electroluminescence

Artist's impression of the nanowire

LED setup. Image: Guillaume Schull, IPCMS

Light was only emitted with the current flowing from the microscope tip towards the gold surface. No light was emitted when the current was reversed (which demonstrates it's behaving like an LED and not merely getting hot enough to glow).

As a tool for physics research, the researchers say in a canned statement you can download here, “this device gives researchers a new tool to probe phenomena that are produced when an electrical conductor emits light and it does so at a scale where quantum physics takes precedence over classical physics.”

It's also a step towards combining electrical and optical properties in molecular-scale components, the researchers add. ®

Top three mobile application threats

More from The Register

next story
Red-faced LOHAN team 'fesses up in blown SPEARS fuse fiasco
Standing in the corner, big pointy 'D' hats
KILLER SPONGES menacing California coastline
Surfers are safe, crustaceans less so
Fancy joining Reg hack on quid-a-day challenge?
Recruiting now for charity starvation diet
LOHAN's Punch and Judy show relaunches Thursday
Weather looking good for second pop at test flights
Discovery time for 200m WONDER MATERIALS shaved from 4 MILLENNIA... to 4 years
Alloy, Alloy: Boffins in speed-classification breakthrough
Curiosity finds not-very-Australian-shaped rock on Mars
File under 'messianic pastries' and move on, people
Elon Musk's LEAKY THRUSTER gas stalls Space Station supply run
Helium seeps from Falcon 9 first stage, delays new legs for NASA robonaut
Top Secret US payload launched into space successfully
Clandestine NRO spacecraft sets off on its unknown mission
prev story

Whitepapers

Designing a defence for mobile apps
In this whitepaper learn the various considerations for defending mobile applications; from the mobile application architecture itself to the myriad testing technologies needed to properly assess mobile applications risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.