Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Graphene applications in electronics and photonics

02.11.2011
Graphene, which is composed of a one-atom-thick layer of carbon atoms in a honeycomb-like lattice (like atomic-scale chicken wire), is the world's thinnest material – and one of the hardest and strongest. Indeed, the past few years have seen an explosion of research into the properties and potential applications of graphene, which has been touted as a superior alternative to silicon.

Because graphene is a two-dimensional material, "all of it is an exposed surface," says physical chemist Phaedon Avouris, manager of the Nanometer Scale Science and Technology division at IBM's T.J. Watson Research Center in Yorktown Heights, N.Y.

"While graphene has a number of extremely useful properties, including very fast electron mobility, high mechanical strength, and excellent thermal conductivity, the interactions of graphene with its environment – for example, with the substrate it is placed on, the ambient environment, or other materials in a device structure – can drastically affect and change its intrinsic properties."

"Our interest is to understand the properties of this new material under conditions that are present in actual technology and apply this knowledge to design, fabricate, and test graphene-based electronic and optoelectronic devices and circuits," says Avouris, who will present new experimental results on the use of graphene in fast electronics and photonics at the AVS meeting in Nashville, Tenn., held Oct. 30 – Nov. 4. He will also discuss what still needs to be done to translate these applications into commercial products.

Avouris, an IBM Fellow, has been involved in nanotechnology research for 25 years, and has spent the last 15 years studying the properties and applications of carbon nanotubes, a close relative of graphene. "So it was natural that when graphene was isolated in 2004, I turned my attention to it. With the help of funding from DARPA, we started a focused effort on graphene electronics," he says.

Unlike conventional semiconductors like silicon and gallium arsenide, which are currently used in electronics, graphene does not have a band-gap – the energy difference between a material's non-conductive and conductive state. "This makes it unsuitable for building digital switches, which require the ability to switch the current off completely," Avouris says. "However," he adds, "the excellent electrical properties of graphene, such as its high electron mobility coupled with modest current modulation, make it very appropriate for very fast (high-frequency) analog electronics," which are used in wireless communications, radar, security systems, imaging, and other applications.

"We already have demonstrated high-frequency graphene transistors – greater than 200 gigahertz – and simple electronic circuits such as frequency mixers," says Avouris, "and we have also demonstrated very fast photodetectors and have used them to detect optical data streams."

In the future, graphene researchers need to improve the quality of synthetic graphene and to study its properties under conditions relevant to technology, says Avouris, who is "very optimistic" about the future of graphene in both electronics and photonics and anticipates the development of additional new applications.

The AVS 58th International Symposium & Exhibition will be held Oct. 30 – Nov. 4 at the Nashville Convention Center.

Presentation NS-WeM-4, "Graphene-based Electronics and Optoelectronics," is at 9 a.m. on Wednesday, Nov. 2.

USEFUL LINKS:

Main meeting website: http://www2.avs.org/symposium/AVS58/pages/greetings.html

Technical Program: http://www2.avs.org/symposium

Catherine Meyers | EurekAlert!
Further information:
http://www.aip.org

More articles from Physics and Astronomy:

nachricht Subnano lead particles show peculiar decay behavior
25.04.2018 | Ernst-Moritz-Arndt-Universität Greifswald

nachricht Getting electrons to move in a semiconductor
25.04.2018 | American Institute of Physics

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: BAM@Hannover Messe: innovative 3D printing method for space flight

At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.

Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...

Im Focus: Molecules Brilliantly Illuminated

Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.

Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Getting electrons to move in a semiconductor

25.04.2018 | Physics and Astronomy

Reconstructing what makes us tick

25.04.2018 | Physics and Astronomy

Cheap 3-D printer can produce self-folding materials

25.04.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>