Navigation Links
Armchair nanoribbons made into spintronic device
Date:1/25/2011

Washington, D.C. (January 25, 2011) -- In a development that may revolutionize handheld electronics, flat-panel displays, touch panels, electronic ink, and solar cells, as well as drastically reduce their manufacturing costs, physicists in Iran have created a spintronic device based on "armchair" graphene nanoribbons. Spintronic devices are being pursued by the semiconductor and electronics industries because they promise to be smaller, more versatile, and much faster than today's electronics.

As described in the American Institute of Physics journal Applied Physics Letters, nanoribbons such as these could one day replace indium tin oxide -- an expensive material for which researchers have been searching for suitable substitutes.

Nanoribbons are carbon nanotubes that have been "unzipped" using a room-temperature chemical process to produce ultrathin, flat ribbons of straight-edged sheets of graphene. Finite, narrow strips of graphene are cut out from a two-dimensional sheet of graphene to create the nanoribbons. And depending on how the ribbon is cut out, it results in either an "armchair" or a zigzag edge. An armchair ribbon can be thought of as essentially an unrolled zigzag nanotube.

"We proposed an electronic spin-filter device using nonmagnetic materials. Our system, which is an all-carbon device, passes only one type of spin current," says Alireza Saffarzadeh, an associate professor in the Department of Physics at Payame Noor University. This property is due to the finite-size effect and geometry of the zigzag-edge graphene nanoribbons, Saffarzadeh explains.

"By applying a gate voltage, the type of spin current can be switched from spin-up to spin-down or vice versa," Saffarzadeh says. "For this reason, the system acts as a spin switch. And these properties are useful in spintronic applications, such as magnetic random access memory."

Saffarzadeh and colleague Roohala Farghadan, a Ph.D. student in Tarbiat Modares University's Department of Physics, found that graphene nanoribbons are good candidates for electronic and spintronic devices due to high carrier mobility, long spin-relaxation times and lengths, and spin-filtering abilities.


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Related biology news :

1. Graphene and spintronics combo looks promising
2. Kount Receives Patent for Device Fingerprinting
3. Nanodiamond drug device could transform cancer treatment
4. Caltech engineers build firast-ever multi-input plug-and-play synthetic RNA device
5. Linking Proteins, Wires, Dots, and Molecules into Useful Devices
6. NC State finds new nanomaterial could be breakthrough for implantable medical devices
7. Futronic Launches FS22 Fingerprint Access Control Device
8. BIO-key(R) Granted Patent for Trusted Biometric Device Security Solution
9. NIST-Cornell team builds worlds first nanofluidic device with complex 3-D surfaces
10. Device protects transplanted pancreatic cells from the immune system
11. Chemical found in medical devices impairs heart function
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of the medical ... premium product recently added to the range of products distributed by Ampronix. ... ... ... Ampronix News ...
(Date:5/20/2016)... 2016  VoiceIt is excited to announce its ... By working together, VoiceIt and VoicePass will ... VoicePass take slightly different approaches to voice biometrics, ... and usability. ... partnership. "This marketing and technology partnership ...
(Date:5/16/2016)... 2016   EyeLock LLC , a market leader ... of an IoT Center of Excellence in ... development of embedded iris biometric applications. EyeLock,s ... and security with unmatched biometric accuracy, making it the ... DNA. EyeLock,s platform uses video technology to deliver a ...
Breaking Biology News(10 mins):
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, ... executives and entrepreneurs, held The Future of San Diego Life Science event at the ... life science community attended the event with speakers Dr. Rich Heyman, former CEO of ...
(Date:5/23/2016)... Texas (PRWEB) , ... May 23, 2016 , ... The need for blood donations in ... this week by the South Texas Blood & Tissue Center, blood donations are on the ... 30 years, and they are down 21 percent in South Texas in the last four ...
(Date:5/23/2016)... WARSAW, Ind. , May 23, 2016 Zimmer ... in musculoskeletal healthcare, today announced that its Board of Directors ... stockholders for the second quarter of 2016. ... on or about July 29, 2016 to stockholders of record ... Future declarations of dividends are subject to approval of the ...
(Date:5/23/2016)... LONDON , May 23, 2016 - ... by 40% - Frontage Implement a Single Platform to ... Compliance and Traceability Within the Bioanalytical lab Frontage Laboratories, ... the United States and China , ... its laboratory facilities. In addition to serving as the global electronic ...
Breaking Biology Technology: