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:9/19/2017)... ... 19, 2017 , ... The new and improved Oakton® pocket testers, from Cole-Parmer, ... upright with a new cap design that is versatile, functional and leakproof. They are ... to test water quality. , The Oakton pocket testers have many user-friendly and functional ...
(Date:9/19/2017)... ... September 19, 2017 , ... ... a partnership with Cytena GmbH to launch the CloneSelect™ Single-Cell Printer™ in North ... to isolate single cells and provide visual documentation of monoclonality for use in ...
(Date:9/18/2017)... ... September 18, 2017 , ... ... move of the SPIE Digital Library ( http://www.spiedigitallibrary.org ) on 15 August to ... an improved user experience and incorporate a number of enhancements and new features, ...
(Date:9/15/2017)... ... September 15, 2017 , ... ... it calls an ‘Internal Seed B’ round of financing, totaling $600,000. The ... completed using a ‘SAFE’ documentation structure at a company valuation of $10M. ...
Breaking Biology Technology:
(Date:5/16/2017)... , May 16, 2017   Bridge ... health organizations, and MD EMR Systems , ... development partner for GE, have established a partnership ... Portal product and the GE Centricity™ products, including ... EMR. These new integrations will ...
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company"), ... Report on Form 10-K on Thursday April 13, 2017 with the ... The ... section of the Company,s website at http://www.nxt-id.com  under "SEC Filings," ... 2016 Year Highlights: Acquisition of ...
(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
Breaking Biology News(10 mins):