Navigation Links
Infrared vision lets researchers see through -- and into -- multiple layers of graphene
Date:11/21/2013

BUFFALO, N.Y. 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.

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.


'/>"/>

Contact: Charlotte Hsu
chsu22@buffalo.edu
716-645-4655
University at Buffalo
Source:Eurekalert  

Related biology technology :

1. Ben-Gurion University awarded $6.5 million grant to develop nano thin infrared night vision glasses
2. New device hides, on cue, from infrared cameras
3. Sensing the infrared: Researchers improve IR detectors with single-walled carbon nanotubes
4. New nano-material combinations produce leap in infrared technology
5. RXi Pharmaceuticals Announces the Start of Their First Phase 2 Study with RXI-109 for Treatment of Hypertrophic Scars in Conjunction with Scar Revision Surgery
6. TrueVision Announces TrueGuide™ Computer-Guided Surgery System for Cataract Surgery
7. Genera Energy Featured on Public Television’s “This American Land”
8. Terascala Advances Its Vision of Optimizing High-Performance Computing Workflows for Faster Time to Results
9. Rudolf Kingslake Medal Awarded by SPIE for TNO Paper on Color Image Fusion for Night-Vision Applications
10. Curemark CEO To Deliver Keynote Address at the BioScience Vision Summit
11. MRIGlobal Engages Industry Expert in Expansion of Molecular Diagnostic Division
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Infrared vision lets researchers see through -- and into -- multiple layers of graphene
(Date:4/27/2016)... ... ... Pittcon Organizing Committee is pleased to announce that Charles “Chuck” Gardner was named president ... Since then, he has served in a number of key leadership positions including secretary ... and exposition committees. In his professional career, Dr. Gardner is the director of product ...
(Date:4/27/2016)... ... April 27, 2016 , ... The ... announce the appointment of John Tilton as Chief Commercial Officer.  Mr. Tilton joined ... of the founding commercial leaders responsible for the commercialization of multiple orphan drug ...
(Date:4/27/2016)... ... April 27, 2016 , ... Global Stem Cells Group ... Ross is the founder of GSCG affiliate Kimera Labs in Miami. , In 2004, ... hematopoietic stem cell transplantation for hematologic disorders and the suppression of graft vs. host ...
(Date:4/26/2016)... ... April 27, 2016 , ... ... Christie LLP as an associate in the firm’s Intellectual Property practice group. , ... and electromechanical patent applications. He has an electrical engineering and computer engineering background, ...
Breaking Biology Technology:
(Date:3/9/2016)... March 9, 2016 This BCC Research report ... of the RNA Sequencing (RNA Seq) market for the ... instruments, tools and reagents, data analysis, and services. ... of the RNA-Sequencing market such as RNA-Sequencing tools and ... main factors affecting each segment and forecast their market ...
(Date:3/3/2016)... 3, 2016  FlexTech, a SEMI Strategic Association Partner, ... Research & Development, Leadership in Education, and, in a ... 9 th year of the FLEXI Awards and ... individuals from past years . Judging was done ... set of criteria, by a panel of non-affiliated, independent, ...
(Date:3/2/2016)... 2, 2016 http://www.researchandmarkets.com/research/cmt3hk/global_biometrics ... "Global Biometrics as a Service Market ... --> http://www.researchandmarkets.com/research/cmt3hk/global_biometrics ) has announced ... as a Service Market 2016-2020" report ... Research and Markets ( http://www.researchandmarkets.com/research/cmt3hk/global_biometrics ) has ...
Breaking Biology News(10 mins):