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Two steps into the paradigm of all graphene electronics: The effect of substrates and a method to "draw" graphene channels

Speaker: Jorge Sofo, Penn State
Date & Time: September 30, 2008 - 1:30pm
Location: Serin 385


Two steps into the paradigm of all graphene electronics: The effect of substrates and a method to "draw" graphene channels
Physics and Astronomy


Jorge Sofo, Penn State
1:30 PM, Serin 385

Graphene is fascinating, it is two dimensional, it has a giant mobility, and it can be cut into ribbons and other shapes. However, to achieve all this potential into working devices, we need to care about a substrate and a way to support those ribbons. I will present our theoretical work on the effect of amorphous SiO2/Si on the electronic states of graphene and a method to "draw" ribbons into an insulating substrate. According to our results, clean SiO2/Si transfers electrons to graphene due to the presence of occupied surface states with a relatively low work function. This result has been confirmed experimentally. I will also present an idea to use insulating CF as the basic drawing board where graphene ribbons can be generated by removal of fluorine. With this method, circuits and junctions of graphene can be drawn on an insulating monolayer of CF that is three atoms thick. In addition to providing mechanical support for the graphene circuits, the method allows for an efficient way to add or remove carriers from the junctions through substitution in the insulating regions.

Host: Haruo Kojima

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Rutgers new scanning transmission electron microscope and new helium ion microscope help researchers develop nanotechnology used to fight cancer, generate power, and create more powerful electronics. Watch the video to learn more.

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