Navigation Links
Single-step technique produces both p-type and n-type doping for future graphene devices
Date:2/11/2010

A simple one-step process that produces both n-type and p-type doping of large-area graphene surfaces could facilitate use of the promising material for future electronic devices. The doping technique can also be used to increase conductivity in graphene nanoribbons used for interconnects.

By applying a commercially-available spin-on-glass (SOG) material to graphene and then exposing it to electron-beam radiation, researchers at the Georgia Institute of Technology created both types of doping by simply varying the exposure time. Higher levels of e-beam energy produced p-type areas, while lower levels produced n-type areas.

The technique was used to fabricate high-resolution p-n junctions. When properly passivated, the doping created by the SOG is expected to remain indefinitely in the graphene sheets studied by the researchers.

"This is an enabling step toward making possible complementary metal oxide graphene transistors," said Raghunath Murali, a senior research engineer in Georgia Tech's Nanotechnology Research Center.

A paper describing the technique appears this week in the journal Applied Physics Letters. The research was supported by the Semiconductor Research Corporation and the Defense Advanced Research Projects Agency (DARPA) through the Interconnect Focus Center.

In the new doping process, Murali and graduate student Kevin Brenner begin by removing flakes of graphene one to four layers thick from a block of graphite. They place the material onto a surface of oxidized silicon, then fabricate a four-point contact device.

Next, they spin on films of hydrogen silsesquoxane (HSQ), then cure certain portions of the resulting thin film using electron beam radiation. The technique provides precise control over the amount of radiation and where it is applied to the graphene, with higher levels of energy corresponding to more cross-linking of the HSQ.

"We gave varyin
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. New lab-on-a-chip technique developed at U of T
2. Leading Cardiovascular Surgeons Gather from Around the World to Share Ross Procedure Survival Data, Techniques at 2nd Annual Summit
3. Graphitic memory techniques advance at Rice
4. Single-molecule technique captures calcium sensor calmodulin in action
5. New MRI technique could mean fewer breast biopsies in high-risk women
6. New statistical technique improves precision of nanotechnology data
7. Five Cord Blood Transplant Centers in Catalonia and Valencia Join a Study to Test a New Technique to Treat Leukemia and Lymphoma
8. Secret of sandcastle construction could help revive ancient building technique, researchers say
9. Quest Diagnostics to Present Genomic Studies Related to New Testing Techniques for Leukemia and Prostate Cancer at 2009 ASCO Meeting
10. Gender-Selection Technique Embraced for Hopeful Parents
11. Novel CU-Boulder technique shrinks size of nanotechnology circuitry
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Single-step technique produces both p-type and n-type doping for future graphene devices
(Date:4/16/2015)... Proove Biosciences , Inc. is pleased to ... for the 2015 BIO International Convention. Hosted by the ... will take place June 15-18 at the Pennsylvania Convention ... contest, industry leaders will be voting for companies they ... community voting period began on April 14, 2015 and ...
(Date:4/16/2015)... According to the 2014 Liberty Mutual ... was ranked first among the leading causes of ... pushing, pulling, holding, carrying, or throwing and cost ... Round Company takes statistics like this very seriously. ... develop and design equipment that prevents these injuries ...
(Date:4/16/2015)... April 16, 2015  In recognition of World Hemophilia Day, ... advocacy groups to illuminate more than 15 prominent landmarks red ... Boston,s Zakim Bridge and Prudential Tower, ... Mercedes-Benz Superdome and Denver,s ... evening of April 17, and coincide with hemophilia community events ...
(Date:4/16/2015)... 2015 /CNW/ - Bioenterprise Corporation is pleased to announce that ... Charlottetown , PEI.  Bioenterprise has established a ... Council for the commercialization of agricultural technologies and innovations. ... PEI ADAPT.  They have been at the heart of ... explains Dave Smardon , President & CEO of ...
Breaking Biology Technology:Proove Bisociences to Participate in the Buzz of BIO at the 2015 BIO International Convention 2Proove Bisociences to Participate in the Buzz of BIO at the 2015 BIO International Convention 3The David Round Company Helps Companies Meet OSHA Standards by Combining Safety, Ergonomics, and Productivity 2Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 2Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 3Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 4Bioenterprise Corporation Expands into the Maritimes 2
... Provides A Modern Venue to View, Customize, and Purchase One-of-A-Kind Art Pieces ... ... -- DNA 11, the innovators and creators of custom portraits made from ... the DNA 11 House . The gallery also marks the ...
... Va., Feb. 25 Edmond Scientific Company (ESC) ... team of Tony Mallia as Practice Director. Mr. ... to bear his experience of enterprise integration in successful ... services sectors. The core goal of this methodology is ...
... reconstructive and aesthetic plastic surgeryMEDFORD, Mass., Feb. ... medical device company developing silk-based biomaterial platforms ... received 510(k) clearance from the U.S. Food ... SeriScaffold (TM) silk-based, long term bioresorbable scaffold ...
Cached Biology Technology:DNA 11, Creators of DNA Art, Opens First Pop-up Gallery 2Edmond Scientific Company 'Spotlight on the Executive': 2Serica Technologies Receives FDA 510(k) Clearance for SeriScaffold(TM) Technology for Soft Tissue Repair 2Serica Technologies Receives FDA 510(k) Clearance for SeriScaffold(TM) Technology for Soft Tissue Repair 3Serica Technologies Receives FDA 510(k) Clearance for SeriScaffold(TM) Technology for Soft Tissue Repair 4
(Date:4/1/2015)... Medisafe ™, the leading global medication management platform with ... Android smartphones and tablets, announces today that ... allow patients to track and correlate their adherence directly ... be able to visualize in real-time how taking medication ... glucose levels and blood pressure. "Patients need ...
(Date:3/26/2015)... The Granite Club, ... club, today announced it has implemented a state-of-the-art access ... for members and staff, while restricting access to authorized ... selected FST,s IMID Access system because it has the ... and staff, in addition to unparalleled security," said ...
(Date:3/24/2015)... 24, 2015   Crossmatch ™, a leading ... that its U.are.U ® 4500 Fingerprint Readers ... Bros . to achieve PCI compliance for Point-of-Sale ... to the POS terminal, protecting the retailer and ... breaches. With one-third of worldwide ...
Breaking Biology News(10 mins):Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2
... in marine mammals, brains reveals that these animals are ... DDTs and PCBs, as well as emerging contaminants such ... lead author on the study currently in press and ... performed the research as a student in the Woods ...
... radio landscape has made it tough for Foghat to get ... to new research published in The American Naturalist . ... that the songs of white-crowned sparrows change over time in ... factors that drive the evolution of mating signals in birds. ...
... Institutes of Health is launching the first integrated, ... rare and neglected diseases. The $24 million program ... Rare and Neglected Diseases Program, or TRND. ... is unusual because TRND creates a drug development ...
Cached Biology News:Skip this cocktail party 2Skip this cocktail party 3Bird songs change with environment 2NIH announces new program to develop therapeutics for rare and neglected diseases 2NIH announces new program to develop therapeutics for rare and neglected diseases 3NIH announces new program to develop therapeutics for rare and neglected diseases 4NIH announces new program to develop therapeutics for rare and neglected diseases 5
Vertical Rack (five box vapor phase rack), includes 2.0" (5.1cm) boxes...
... The 1-D PAGE ... Kit for Targeted Protein ... SDS PolyAcrylamide Gel Electrophoresis ... chemistry, and cleavable-linker technology ...
Conjugate Quality Control Evaluation Specificity: Conjugate Quality Control Evaluation ...
Qa-1 (L-12)...
Biology Products: