Skip to main content

Light Can Control Electrical Properties of Graphene



New research published January 10, shows how light can be used to control the electrical properties of graphene, paving the way for graphene-based optoelectronic devices and highly sensitive sensorsThis year's Nobel Prize for Physics was awarded for research into graphene, recognising its potential for many applications in modern life, from high-speed electronics to touchscreen technology. The UK's National Physical Laboratory, along with a team of international scientists, have further developed our understanding of graphene by showing that when this remarkable material is combined with particular polymers, its electrical properties can be precisely controlled by light and exploited in a new generation of optoelectronic devices. The polymers keep memory of light and therefore the graphene device retains its modified properties until the memory is erased by heating.

Light-modified graphene chips have already been used at NPL in ultra-precision experiments to measure the quantum of the electrical resistance.

In the future, similar polymers could be used to effectively 'translate' information from their surroundings and influence how graphene behaves. This effect could be exploited to develop robust reliable sensors for smoke, poisonous gases, or any targeted molecule.

Graphene is an extraordinary two-dimensional material made of a single atomic layer of carbon atoms. It is the thinnest material known to man, and yet is one of the strongest ever tested.

Graphene does not have volume, only surface -- its entire structure is exposed to its environment, and responds to any molecule that touches it. This makes it in principle a very exciting material for super-sensors capable of detecting single molecules of toxic gases. Polymers can make graphene respond to specific molecules and ignore all others at the same time, which also protects it from contamination.

The research team included scientists from the National Physical Laboratory (UK), Chalmers University of Technology (Sweden), University of Copenhagen (Denmark), University of California Berkeley (USA), Linköping University (Sweden) and Lancaster University (UK).

Comments

Popular posts from this blog

Top 5 Women Who Impacted Technology in 2010

Katie Stanton, International Strategist for Twitter Katie Stanton has impressively long names of companies in her resume. They include the White House, Google Inc, and her latest addition is Twitter. Her remit is working on Twitter’s international strategy and her experience in social media will be a key asset to the company. Katie has a history of working in technology, and her knowledge of departmental laws will help Twitter work alongside government agencies, as she’ll be spearheading the free information approach, especially after the Wikileaks incident. Stanton has been a key player in the techsphere for some time, and this extends to her private life. Following the Haiti disaster she worked with a group of engineers to create a free texting service to help those in need and she is constantly in demand as an expert in both social media and government policy.
Caterina Fake, Co-Founder of Flickr and Hunch Despite having a surname which sounds like a pseudonym for a spy (it’…

AT&T MiFi 2372 review

In the week or so that I have been testing the AT&T MiFi 2372 by Novatel Wireless, it has already saved no less than three lives. First, it saved my cable guy’s life. You see, Time Warner Cable provides the worst home Internet service I have ever experienced. I can’t even think of a close second. If providing terrible home Internet service was a sport, Time Warner Cable would be on its tenth consecutive undefeated season. Forget the fact that my upload speed is capped at 60Kbps and I’m lucky if I can get half that — it has been months since I’ve gone through a full day without at least one service interruption. Months. Unfortunately, Time Warner Cable has an exclusive contract with my building so I have no choice but to endure its abysmal service. Last week, as a Time Warner Cable technician entered my home for the sixth time in two months, I realized that this certainly would have spelled serious trouble had it not been for my trusty new back up device. Before the Mi…

Evolution Of Computer Virus [infographic]