Chemically derived, ultrasmooth graphene nanoribbon semiconductors.
We developed a chemical route to produce graphene nanoribbons (GNR) with width below 10 nanometers, as well as single ribbons with varying widths along their lengths or containing lattice-defined graphene junctions for potential molecular electronics. The GNRs were solution-phase-derived, stably suspended in solvents with noncovalent polymer functionalization, and exhibited ultrasmooth edges with possibly well-defined zigzag or armchair-edge structures. Electrical transport experiments showed that, unlike single-walled carbon nanotubes, all of the sub-10-nanometer GNRs produced were semiconductors and afforded graphene field effect transistors with on-off ratios of about 10(7) at room temperature.
Li
Xiaolin
X
Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
Wang
Xinran
X
Zhang
Li
L
Lee
Sangwon
S
Dai
Hongjie
H