Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Infrared vision lets researchers see through and into multiple layers of graphene

The direction that a light wave is oscillating changes as the wave is reflected by a sheet of graphene. Researchers exploited this changing quality to identify the electronic properties of multiple sheets of graphene stacked atop one another even when they were covering each other up. Credit: Chul Soo Kim, U.S. Naval Research Laboratory
The direction that a light wave is oscillating changes as the wave is reflected by a sheet of graphene. Researchers exploited this changing quality to identify the electronic properties of multiple sheets of graphene stacked atop one another even when they were covering each other up.

Credit: Chul Soo Kim, U.S. Naval Research Laboratory

Abstract:
It's not X-ray vision, but you could call it infrared vision.

A University at Buffalo-led research team has developed a technique for "seeing through" a stack of graphene sheets to identify and describe the electronic properties of each individual sheet even when the sheets are covering each other up.

Infrared vision lets researchers see through and into multiple layers of graphene

Buffalo, NY | Posted on November 21st, 2013

The method involves shooting a beam of infrared light at the stack, and measuring how the light wave's direction of oscillation changes as it bounces off the layers within.

To explain further: When a magnetic field is applied and increased, different types of graphene alter the direction of oscillation, or polarization, in different ways. A graphene layer stacked neatly on top of another will have a different effect on polarization than a graphene layer that is messily stacked.

"By measuring the polarization of reflected light from graphene in a magnetic field and using new analysis techniques, we have developed an ultrasensitive fingerprinting tool that is capable of identifying and characterizing different graphene multilayers," said John Cerne, PhD, UB associate professor of physics, who led the project.

The technique allows the researchers to examine dozens of individual layers within a stack.

Graphene, a nanomaterial that consists of a single layer of carbon atoms, has generated huge interest due to its remarkable fundamental properties and technological applications. It's lightweight but also one of the world's strongest materials. So incredible are its characteristics that it garnered a Nobel Prize in Physics in 2010 for two scientists who pioneered its study.

Cerne's new research looks at graphene's electronic properties, which change as sheets of the material are stacked on top of one another. The findings appeared Nov. 5 in Scientific Reports, an online, open-access journal produced by the publishers of Nature.

Cerne's collaborators included colleagues from UB and the U.S. Naval Research Laboratory.

So, why don't all graphene layers affect the polarization of light the same way?

Cerne says the answer lies in the fact that different layers absorb and emit light in different ways.

The study showed that absorption and emission patterns change when a magnetic field is applied, which means that scientists can turn the polarization of light on and off either by applying a magnetic field to graphene layers or, more quickly, by applying a voltage that sends electrons flowing through the graphene.

"Applying a voltage would allow for fast modulation, which opens up the possibility for new optical devices using graphene for communications, imaging and signal processing," said first author Chase T. Ellis, a former graduate research assistant at UB and current postdoctoral fellow at the Naval Research Laboratory.

####

For more information, please click here

Contacts:
Charlotte Hsu
Media Relations Manager, Architecture, Economic Development, Sciences, Urban and Regional Planning
Tel: 716-645-4655

Twitter: @UBScience
Pinterest: UB Science

Copyright © University at Buffalo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Download abstract:

Related News Press

News and information

New Topical Hemostatic Agent: Neutral Self-Assembling Peptide Hydrogel September 30th, 2014

Chemical interactions between silver nanoparticles and thiols: A comparison of mercaptohexanol again September 30th, 2014

A Heartbeat Away? Hybrid "Patch" Could Replace Transplants: TAU researcher harnesses gold nanoparticles to engineer novel biocompatible cardiac patch September 30th, 2014

Nanoparticles Used to Improve Quality of Bone Cement September 29th, 2014

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

Wireless/telecommunications/RF/Antennas

How things coil: Researchers discover that simulation technology designed for Hollywood can be used as a predictive tool for understanding fundamental engineering problems September 29th, 2014

Imaging

Iranian Scientists Determine Grain Size, Minimize Time of Nanocomposite Synthesis September 29th, 2014

Oxford Instruments launches 3rd annual Indian nanotechnology seminars in Kolkata and Delhi - sharing expertise with Nanotechnology researchers in India September 25th, 2014

Laboratories

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

On the Road to Artificial Photosynthesis: Berkeley Lab Study Reveals Key Catalytic Factors in Carbon Dioxide Reduction September 25th, 2014

World's smallest reference material is big plus for nanotechnology September 25th, 2014

Graphene

Elsevier Publishes New Content on Graphene and Materials Science: Books Discuss Properties and Emerging Applications of Carbon Nanotubes, Graphene and Nanomaterials September 25th, 2014

Govt.-Legislation/Regulation/Funding/Policy

A Heartbeat Away? Hybrid "Patch" Could Replace Transplants: TAU researcher harnesses gold nanoparticles to engineer novel biocompatible cardiac patch September 30th, 2014

How things coil: Researchers discover that simulation technology designed for Hollywood can be used as a predictive tool for understanding fundamental engineering problems September 29th, 2014

UT Arlington researchers develop transparent nanoscintillators for radiation detection for medical safety and homeland security September 29th, 2014

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

Discoveries

New Topical Hemostatic Agent: Neutral Self-Assembling Peptide Hydrogel September 30th, 2014

Chemical interactions between silver nanoparticles and thiols: A comparison of mercaptohexanol again September 30th, 2014

A Heartbeat Away? Hybrid "Patch" Could Replace Transplants: TAU researcher harnesses gold nanoparticles to engineer novel biocompatible cardiac patch September 30th, 2014

Nanoparticles Used to Improve Quality of Bone Cement September 29th, 2014

Announcements

New Topical Hemostatic Agent: Neutral Self-Assembling Peptide Hydrogel September 30th, 2014

Chemical interactions between silver nanoparticles and thiols: A comparison of mercaptohexanol again September 30th, 2014

A Heartbeat Away? Hybrid "Patch" Could Replace Transplants: TAU researcher harnesses gold nanoparticles to engineer novel biocompatible cardiac patch September 30th, 2014

Nanoparticles Used to Improve Quality of Bone Cement September 29th, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

New Topical Hemostatic Agent: Neutral Self-Assembling Peptide Hydrogel September 30th, 2014

Chemical interactions between silver nanoparticles and thiols: A comparison of mercaptohexanol again September 30th, 2014

A Heartbeat Away? Hybrid "Patch" Could Replace Transplants: TAU researcher harnesses gold nanoparticles to engineer novel biocompatible cardiac patch September 30th, 2014

Nanoparticles Used to Improve Quality of Bone Cement September 29th, 2014

Military

UT Arlington researchers develop transparent nanoscintillators for radiation detection for medical safety and homeland security September 29th, 2014

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

Nanotechnology leads to better, cheaper LEDs for phones and lighting September 24th, 2014

Engineered proteins stick like glue even in water: New adhesives based on mussel proteins could be useful for naval or medical applications September 22nd, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE