Navigation Links
Graphene may gain an 'on-off switch,' adding semiconductor to long list of material's achievements
Date:6/17/2011

College Park, MD (June 17, 2011)--A team of researchers has proposed a way to turn the material graphene into a semiconductor, enabling it to control the flow of electrons with a laser "on-off switch".

Graphene is thinnest and strongest material ever discovered. It's a layer of carbon atoms only one-atom thick, but 200 times stronger than steel. It also conducts electricity extremely well and heat better than any other known material. It is almost completely transparent, yet so dense that not even atoms of helium can penetrate it. In spite of the impressive list of promising prospects, however, graphene appears to lack a critical property -- it doesn't have a "band gap."

A band gap is the basic property of semiconductors, enabling materials to control the flow of electrons. This on-off property is the foundation of computers, encoding the 0s and 1s of computer languages.

Now, a team of researchers at the National University of Crdoba and CONICET in Argentina; the Institut Catala de Nanotecnologia in Barcelona, Spain; and RWTH Aachen University, Germany; suggest that illuminating graphene with a mid-infrared laser could be a key to switch off conduction, thereby improving the possibilities for novel optoelectronic devices.

In an article featured in Applied Physics Letters, the researchers report on the first atomistic simulations of electrical conduction through a micrometer-sized graphene sample illuminated by a laser field. Their simulations show that a laser in the mid-infrared can open an observable band gap in this otherwise gapless material.

"Imagine that by turning on the light, graphene conduction is turned off, or vice versa. This would allow the transduction of optical into electrical signals," says Luis Foa Torres, the researcher leading this collaboration. "The problem of graphene interacting with radiation is also of current interest for the understanding of more exotic states of matter such as the topological insulators."


'/>"/>

Contact: Charles E. Blue
cblue@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert  

Related biology technology :

1. Singapore researchers invent broadband graphene polarizer
2. University of Houston develops method for creating single-crystal arrays of graphene
3. Defect in graphene may present bouquet of possibilities
4. Activated graphene makes superior supercapacitors for energy storage
5. Why graphene holds the key to the future
6. GRAPHENE-CA appointed an EU Future Emerging Technology flagship pilot
7. 2 graphene layers may be better than 1
8. Researchers pinpoint graphenes varying conductivity levels
9. UMD scientists make magnetic new graphene discovery
10. New spin on graphene
11. Self-cooling observed in graphene electronics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Graphene may gain an 'on-off switch,' adding semiconductor to long list of material's achievements
(Date:1/11/2017)... ... January 11, 2017 , ... Back pain relief technology is now available without ... for positive back pain relief for WAR members. , This spinal restoration platform boasts ... life changing for millions suffering from chronic back pain. , What A Relief ...
(Date:1/11/2017)... and BENGALURU, India , Jan. ... Biocon Ltd. (BSE code: 532523, NSE: BIOCON) today announced ... accepted Mylan,s biologics license application (BLA) for MYL-1401O, a ... This product is a proposed biosimilar to branded trastuzumab, ... The anticipated FDA goal date set under the Biosimilar ...
(Date:1/11/2017)... GAITHERSBURG, Md. , Jan. 11, 2017 /PRNewswire/ ... clinical-stage gene delivery company, announced today that its ... will present a talk entitled  "AdenoVerse™ platform for ... during the Biotech Showcase at the upcoming Phacilitate ... Miami , Florida.  Dr. Brough,s ...
(Date:1/11/2017)... (PRWEB) , ... January 11, 2017 , ... ... signed a multi-year license agreement with Poseida Therapeutics Inc, the San Diego based ... genetic data. Poseida Therapeutics selected KBioBox in order to harness KBioBox’s powerful BioEngine ...
Breaking Biology Technology:
(Date:12/15/2016)... AUBURN HILLS, Mich. , Dec. 15, 2016 /PRNewswire/ ... simply unlocking car doors or starting the engine. Continental ... 2017 in Las Vegas . Through ... PASE (Passive Start and Entry) and biometric elements, the ... the field of vehicle personalization and authentication. ...
(Date:12/7/2016)... PUNE, India , December 7, 2016 According to ... NLP, Machine Learning), Software Tool (Facial Expression, Voice Recognition), Service, Application Area, End ... size is estimated to grow from USD 6.72 Billion in 2016 to USD ... Continue Reading ... ...
(Date:12/6/2016)... , Dec. 6, 2016 Valencell , the ... it has seen a third consecutive year of triple ... technology in 2016 with a 360 percent increase in ... This increase was driven by sales of its wrist ... interest in its technology for hearables for fitness and ...
Breaking Biology News(10 mins):