Manchester confirms charge-carrier mobility for graphene ribbons

In research that could help bring graphene-based electronics closer, University of Manchester scientists have helped demonstrate that long, structurally well-defined ribbons of graphene can be made, they report in Nature Chemistry.


Different characterisation techniques, including Raman spectroscopy, were used by the group led by Dr Cinzia Casiraghi to confirm that these nano ribbons (called GNRs) “are structurally well-defined and have excellent charge-carrier mobility”.

The university reports:

Current approaches do not allow production of highly structurally-defined and narrow GNRs suitable for electronics. Therefore, it is hoped that this development will allow graphene to be used in transistors.

The newly developed approach was developed by Prof Muellen and Dr Feng from the Max Planck Institute for Polymer Research allows unprecedented longitudinal extension of GNRs while preserving their high structural definition.

“The GNRs produced with this method can allow development of graphene-based transistors, but they can also be used as active material in solar cells, chemical sensors and as novel energy storage material,” said Dr Casiraghi. “Because of the potential uses of this material, Raman spectroscopy is expected to play a crucial role in determining the optical and electronic properties of the ribbons.”

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