Highlight: Nanopatterning of Graphene

March 11, 2010
Hydrogen passivated graphene imaged and patterned at the atomic scale with STM
Hydrogen passivated graphene imaged and patterned at the atomic scale with STM

Center for Nanoscale Materials (CNM) at Argonne National Laboratory users from Politecnico di Milano in Italy, working collaboratively with researchers in the Electronic & Magnetic Materials & Devices Group, have demonstrated the reversible and local modification of the electronic properties of graphene by hydrogen passivation and subsequent electron-stimulated hydrogen desorption with a scanning tunneling microscope (STM) tip.

Graphene is a nearly ideal two-dimensional conductor consisting of a single sheet of hexagonally packed carbon atoms. The hydrogen passivation modifies graphene’s electronic properties, opening a gap in the local density of states.

The insulating state is reversed by local desorption of the , upon which the unaltered electronic properties are recovered. Using this mechanism, graphene patterns can be “written” on nanometer length scales. For patterned regions 20 nm or greater, the inherent electronic properties of graphene are completely recovered. Below 20 nm, dramatic variations in the are observed.

This reversible and local mechanism has far-reaching implications for nanoscale circuitry fabricated from this revolutionary material.

Explore further: Light-speed nanotech: Controlling the nature of graphene

More information: P. Sessi, J. R. Guest, M. Bode, N. P. Guisinger, Nano Letters, 9, 4343 (2009).

Related Stories

Light-speed nanotech: Controlling the nature of graphene

January 21, 2009

Researchers at Rensselaer Polytechnic Institute have discovered a new method for controlling the nature of graphene, bringing academia and industry potentially one step closer to realizing the mass production of graphene-based ...

A huge step toward mass production of graphene

March 10, 2010

Scientists have leaped over a major hurdle in efforts to begin commercial production of a form of carbon that could rival silicon in its potential for revolutionizing electronics devices ranging from supercomputers to cell ...

Recommended for you

Making nanowires from protein and DNA

September 3, 2015

The ability to custom design biological materials such as protein and DNA opens up technological possibilities that were unimaginable just a few decades ago. For example, synthetic structures made of DNA could one day be ...

Graphene made superconductive by doping with lithium atoms

September 2, 2015

(Phys.org)—A team of researchers from Germany and Canada has found a way to make graphene superconductive—by doping it with lithium atoms. In their paper they have uploaded to the preprint server arXiv, the team describes ...

For 2-D boron, it's all about that base

September 2, 2015

Rice University scientists have theoretically determined that the properties of atom-thick sheets of boron depend on where those atoms land.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.