Which science field has the most promising future?

Computer science
Nanotechnology
Biotechnology
Aerospace engineering
Ecology, resource saving
Cleantech
Other

What is the mankind's most dangerous invention?

Atomic bomb
Drugs
Automobile
Money
Television
Fast food
Internet

At Stanford, Russian and his colleagues turn DNA into basis for carbon transistors

Anatoliy N. Sokolov, a Russian scientist working at Stanford, and other local physicists have developed a method of obtaining carbon transistors by ‘charring’ DNA strands, Lenta.ru reported. The technique was described in Nature Communications, an international scientific online journal.

The research team is said to have aimed to use DNA as a basis for growing nanoscopic graphitic nanoribbons up to 10 nanometers in width (several atoms thick) and a few micrometers in length in special chemical vapor deposition conditions.

During the experiments, bacterial DNA was placed to a silicon substrate where the spiral nucleic acid strands were stretched to become almost straight. The DNA-containing substrate was then moved into a methane-containing vacuum-sealed chamber and heated. When impacted by heat, some of the carbon atoms would detach from their ‘home’ DNA, as the acid molecule was virtually charred on the substrate. The detached atoms would then bond methane molecules, thus forming thin graphitic ribbons.

According to the project initiators, “depending on the growth conditions, metallic or semiconducting graphitic nanoribbons” were formed—a result that cannot be achieved in experimenting with sheet graphene. This may lay the groundwork for improving the method and using the semiconducting properties of the nanoribbons in the development of next gen carbon transistors.  

2013-09-18, Marchmont News.


Keywords: science, physics

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