Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Student’s Discovery Advances Nanotech Research

Materials science graduate student Muge Acik has been working with graphene, a single sheet of carbon that exhibits unique electronic and mechanical properties.
Materials science graduate student Muge Acik has been working with graphene, a single sheet of carbon that exhibits unique electronic and mechanical properties.

Abstract:
Enhanced, Ultra-Thin Sheets of Carbon Hold Promise in Sensor Applications

Student’s Discovery Advances Nanotech Research

Richardson, TX | Posted on October 7th, 2010

A UT Dallas graduate student's surprising research results could ultimately lead to high-performance nanoelectronics applications such as electron emitters, thermal-infrared night-vision sensors and solar absorbers for harvesting sunlight.

Materials science graduate student Muge Acik has been working with graphene, a single sheet of carbon that exhibits unique electronic and mechanical properties, making it a candidate to eventually replace silicon in applications like ultrafast transistors.

Making real-world devices from graphene, however, depends upon controlling the edges of graphene sheets, which often dictate the material's electronic properties. Simply adding oxygen atoms at the edges may turn graphene into an insulator.

Performing her experimental work on graphene oxide (GO) in Dr. Yves Chabal's Laboratory for Surface and Nanostructure Modification, Acik discovered a new infrared absorption mechanism when GO is annealed to about 850°C to remove most oxygen. The result was a very special arrangement of oxygen atoms at the edges. This stable configuration fosters the electronic conduction or emission necessary for device operation and for electron emitters.

Moreover, "this new phenomenon opens the door to tailoring giant infrared absorption at different spectral positions by modifying the nature of the edge termination," she and her co-investigators concluded. And that opens the door to employing graphene in a number of nanoelectronic applications in which infrared absorption is important, such as night-vision sensors and sunlight-harvesting solar absorbers.

"This work is a good example where the contribution from theory has been critical, as provided by Dr. G. Lee, a postdoctoral fellow working under the supervision of Dr. Kyeongjae ‘KJ' Cho," said Chabal, head of materials science and engineering and holder of the Texas Instruments Distinguished University Chair in Nanoelectronics. "The theory provided a detailed understanding of this new phenomenon that would have remained puzzling on its own."

Cho added that "this experimental finding is consistent with an earlier theoretical prediction of the metallic state of graphene edge oxide published in Physical Review in 2009."

The team's results recently appeared in the journal Nature Materials in an article titled "Unusual Infrared Absorption Mechanism in Thermally Reduced Graphene Oxide."

This absorption is a new phenomenon that's unique to graphene, according to Chabal in an article that appeared in nanotechweb.org, noting that the potential applications are very exciting.

"The effect cannot be explained by simple infrared absorption mechanisms and can only happen if free, mobile electrons are induced in reduced graphene oxide - something that has never been observed before," the article concluded.

The research was funded by the Semiconductor Research Corp.'s Nanotechnology Research Initiative and by Texas Instruments. The work was done in collaboration with Cecilia Mattevi and Manish Chhowalla at Rutgers University. A synopsis of the Nature Materials article is featured under Nano Focus here.

####

For more information, please click here

Contacts:
Media Contact: David Moore, UT Dallas, (972) 883-4183,

Office of Media Relations, UT Dallas, (972) 883-2155,

Copyright © University of Texas at Dallas

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 News Press

News and information

Researchers develop new way to manufacture nanofibers May 21st, 2015

Nanotherapy effective in mice with multiple myeloma May 21st, 2015

Turn that defect upside down: Twin boundaries in lithium-ion batteries May 21st, 2015

INSIDDE: Uncovering the real history of art using a graphene scanner May 21st, 2015

Possible Futures

Simulations predict flat liquid May 21st, 2015

Nature inspires first artificial molecular pump: Simple design mimics pumping mechanism of life-sustaining proteins found in living cells May 19th, 2015

NNCO and Museum of Science Fiction to Collaborate on Nanotechnology and 3D Printing Panels at Awesome Con May 19th, 2015

Quantum 'gruyères' for spintronics of the future: Topological insulators become a little less 'elusive' May 12th, 2015

Academic/Education

SUNY Poly CNSE and NIOSH Launch Federal Nano Health and Safety Consortium: May 20th, 2015

New JEOL E-Beam Lithography System to Enhance Quantum NanoFab Capabilities May 6th, 2015

FEI Partners With the George Washington University to Equip New Science & Engineering Hall: Suite of new high-performance microscopes will be used for cutting-edge experiments at GW’s new research facility April 29th, 2015

Renishaw Raman systems used to study 2D materials at Boston University, Massachusetts, USA. April 28th, 2015

Chip Technology

Nanometrics Announces Live Webcast of Upcoming Investor and Analyst Day May 20th, 2015

Sandia researchers first to measure thermoelectric behavior by 'Tinkertoy' materials May 20th, 2015

Defects can 'Hulk-up' materials: Berkeley lab study shows properly managed damage can boost material thermoelectric performances May 20th, 2015

GLOBALFOUNDRIES Offers New Low-Power 28nm Solution for High-Performance Mobile and IoT Applications: Technology is the first in the industry to provide design enablement support optimized to meet low power requirements of RF SoCs May 20th, 2015

Sensors

Record high sensitive Graphene Hall sensors May 21st, 2015

Graphene enables tunable microwave antenna May 15th, 2015

Janusz Bryzek Joins MEMS Industry Group to Lead New TSensors Division - New Division will Focus on Accelerating Development of Emerging Ultra-high Volume Sensors Supporting Abundance, mHealth and IoT May 14th, 2015

Nano-policing pollution May 13th, 2015

Nanoelectronics

Random nanowire configurations increase conductivity over heavily ordered configurations May 16th, 2015

Channeling valleytronics in graphene: Berkeley Lab researchers discover 1-D conducting channels in bilayer graphene May 6th, 2015

A better way to build DNA scaffolds: McGill researchers devise new technique to produce long, custom-designed DNA strands May 6th, 2015

Surface matters: Huge reduction of heat conduction observed in flat silicon channels April 23rd, 2015

Discoveries

Simulations predict flat liquid May 21st, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Nanotherapy effective in mice with multiple myeloma May 21st, 2015

Turn that defect upside down: Twin boundaries in lithium-ion batteries May 21st, 2015

Announcements

Researchers develop new way to manufacture nanofibers May 21st, 2015

Nanotherapy effective in mice with multiple myeloma May 21st, 2015

Turn that defect upside down: Twin boundaries in lithium-ion batteries May 21st, 2015

INSIDDE: Uncovering the real history of art using a graphene scanner May 21st, 2015

Energy

Sandia researchers first to measure thermoelectric behavior by 'Tinkertoy' materials May 20th, 2015

Industrial Nanotech, Inc. Announces Official Launch of the Eagle Platinum Tile™ May 19th, 2015

FEI and Weatherford Enter Into Joint Agreement for Advanced Reservoir Characterization Services May 18th, 2015

Efficiency record for black silicon solar cells jumps to 22.1 percent: Aalto University's researchers improved their previous record by over 3 absolute percents in cooperation with Universitat Politècnica de Catalunya May 18th, 2015

Solar/Photovoltaic

Efficiency record for black silicon solar cells jumps to 22.1 percent: Aalto University's researchers improved their previous record by over 3 absolute percents in cooperation with Universitat Politècnica de Catalunya May 18th, 2015

Wearables may get boost from boron-infused graphene: Rice U. researchers flex muscle of laser-written microsupercapacitors May 18th, 2015

Random nanowire configurations increase conductivity over heavily ordered configurations May 16th, 2015

ORNL demonstrates first large-scale graphene fabrication May 14th, 2015

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