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

g doses of electron-beam radiation and then studied how it influenced the properties of carriers in the graphene lattice," Murali said. "The e-beam gave us a fine range of control that could be valuable for fabricating nanoscale devices. We can use an electron beam with a diameter of four or five nanometers that allows very precise doping patterns."

Electronic measurements showed that a graphene p-n junction created by the new technique had large energy separations, indicating strong doping effects, he added.

Researchers elsewhere have demonstrated graphene doping using a variety of processes including soaking the material in various solutions and exposing it to a variety of gases. The Georgia Tech process is believed to be the first to provide both electron and hole doping from a single dopant material.

Doping processes used for graphene are likely to be significantly different from those established for silicon use, Murali said. In silicon, the doping step substitutes atoms of a different material for silicon atoms in the material's lattice.

In the new single-step process for graphene, the doping is believed to introduce atoms of hydrogen and oxygen in the vicinity of the carbon lattice. The oxygen and hydrogen don't replace carbon atoms, but instead occupy locations atop the lattice structure.

"Energy applied to the SOG breaks chemical bonds and releases hydrogen and oxygen which bond with the carbon lattice," Murali said. "A high e-beam energy converts the whole SOG structure to more of a network, and then you have more oxygen than hydrogen, resulting in a p-type doping."

In volume manufacturing, the electron beam radiation would likely be replaced by a conventional lithography process, Murali said. Varying the reflectance or transmission of the mask set would control the amount of radiation reaching the SOG, and that would determine whether n-type or p-type areas are created.

"Making ev
'/>"/>

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:9/30/2014)... of one of nature,s most efficient light-harvesting structures, ... by Alejandro Briseno of the University of Massachusetts ... long-sought polymer architecture to boost power-conversion efficiency of ... , Briseno, with colleagues and graduate students ... and Dresden University of Technology, Germany, report in ...
(Date:9/30/2014)... Sept. 30, 2014 Report Details ... highest potential revenues Do you want to find ... you revenue predictions for those biological drugs from ... you find financial data, R&D trends, opportunities and ... sales forecasts to 2024 at overall world market, ...
(Date:9/30/2014)... , Sept. 30, 2014 Nematicide is ... nematodes. Nematodes are microscopic parasitic roundworms, found in ... inside other plants and animals. Nematicides have tended ... other properties promoting migration through the soil. A ... 1,000 plant-parasitic nematodes. With more than 10,000 species ...
(Date:9/30/2014)... Proove Biosciences , the commercial and research ... new genetic test built upon research from their published ... will provide physicians with an objective way to understand ... stratified between individuals. With this new test, physicians will ... genetic predisposition that will affect their pain tolerance. , ...
Breaking Biology Technology:Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 4Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 5Nematicides Market by Types (Fumigants, Organophosphates, Carbamate and Bio-Nematicides), Applications (Agrochemicals, Industrial, and Others), and Geography (North America, Europe, Asia-Pacific & ROW) - Global Trends & Forecasts to 2019 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 3
... ( http://www.amdl.com ),AMDL, Inc. (Amex: ADL ), ... China and the US, today announced that the,Company will ... New,York City on Tuesday, October 7, 2008 at 10:30 ... Hyatt New York Hotel in the Morosco Room., ...
... Proceeds to Support R&D Efforts and Clinical ... BETHESDA, Md., Oct. 3 Micromet, Inc. ... company developing,novel, proprietary antibodies for the treatment ... that it has closed its previously,announced $40 ...
... of Aberdeen and Rothamsted Research for releasing natural insect repellents that ... technology is set to revolutionise how people protect buildings from unwanted ... ... (PRWEB) October 3, 2008 -- Atrium Innovation Ltd has developed a ...
Cached Biology Technology:AMDL, Inc. to Present at Maxim Group Growth Conference October 7, 2008 2AMDL, Inc. to Present at Maxim Group Growth Conference October 7, 2008 3Micromet Closes $40 Million Private Equity Placement 2Micromet Closes $40 Million Private Equity Placement 3Micromet Closes $40 Million Private Equity Placement 4New Innovation Set to Revolutionise Spray Technology - Used to Protect Against the Scottish Biting Midge & Help Fight MRSA in the NHS 2New Innovation Set to Revolutionise Spray Technology - Used to Protect Against the Scottish Biting Midge & Help Fight MRSA in the NHS 3New Innovation Set to Revolutionise Spray Technology - Used to Protect Against the Scottish Biting Midge & Help Fight MRSA in the NHS 4
(Date:9/30/2014)... assessment conducted by the Ocean Health Index rates ... in overall health. In addition, for the first ... 15 ocean regions beyond national jurisdiction (high-seas areas) ... climate, safeguarding biodiversity and providing sustainable food sources. ... index, a partnership led by scientists from UC ...
(Date:9/30/2014)... professor and Howard Hughes Medical Institute investigator, and ... recipients in the 2014 round of grants from ... BRAIN (Brain Research through Advancing Innovative Neurotechnologies) Initiative ... September 30, provides more than $3 million in ... , The BRAIN Initiative, launched last year, is ...
(Date:9/30/2014)... live in almost any aquatic environment on Earth, but ... species are pushed to the limit. The amount of ... critical for how different species cope in the future, ... of Gothenburg, published in the scientific journal Proceedings ... continues apace thanks to increasing levels of greenhouse gases ...
Breaking Biology News(10 mins):Rating the planet's oceans 2Rating the planet's oceans 3Salk scientists receive $3 million for BRAIN Initiative grant 2Shape up quickly -- applies to fish, too! 2
... When ordering seafood, the options are many and so are ... Is your fish healthy? Is it safe? Is it endangered? While ... there,s even an iPhone app a group of researchers ... fish is sustainable, then it is likely to be healthy to ...
... States, one in 10 children suffers from asthma but ... not well known. Cincinnati-based researchers now report new evidence ... may have a direct link to asthma development during ... unguis and Penicillium variabileare typically found growing in water-damaged ...
... heavy rains and droughts that climate change will bring, says ... at a contentious U.S. Senate hearing on climate change, Stanford,s ... yet hopeful analogy. Just as speeding increases the chance ... of heat waves, droughts and heavy precipitation, said Field, a ...
Cached Biology News:Study finds healthy seafood comes from sustainable fish 2Infants exposed to specific molds have higher asthma risk 2Stanford expert brings climate change science to heated Capitol Hill 2
... Mouse polyclonal antibody raised against ... Immunogen: PPP4C ... a.a) partial recombinant protein with ... Accession Number: NM_002720 ...
... Eppendorf Thermomixer R offers maximum application ... shaking, heating, and cooling. Its active ... application and temperature control ranges. Five ... 24 micro test tubes, are available ...
Mouse monoclonal antibody raised against a partial recombinant PDE2A. NCBI Entrez Gene ID = PDE2A...
... II can be used to test the ... and sera that are commonly used as ... contains spots for 19 different protein preparations ... antibody crossreactivity and species specificity, QC of ...
Biology Products: