Nano Archive

Tailoring the atomic structure of graphene nanoribbons by scanning tunnelling microscope lithography

Tapaszto, Levente and Dobrik, Gergely and Lambin, Philippe and Biro, Laszlo P. (2008) Tailoring the atomic structure of graphene nanoribbons by scanning tunnelling microscope lithography. NATURE NANOTECHNOLOGY, 3 (7). pp. 397-401.

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The practical realization of nanoscale electronics faces two major challenges: the precise engineering of the building blocks and their assembly into functional circuits(1). In spite of the exceptional electronic properties of carbon nanotubes(2), only basic demonstration devices have been realized that require time-consuming processes(3-5). This is mainly due to a lack of selective growth and reliable assembly processes for nanotubes. However, graphene offers an attractive alternative. Here we report the patterning of graphene nanoribbons and bent junctions with nanometre-precision, well-defined widths and predetermined crystallographic orientations, allowing us to fully engineer their electronic structure using scanning tunnelling microscope lithography. The atomic structure and electronic properties of the ribbons have been investigated by scanning tunnelling microscopy and tunnelling spectroscopy measurements. Opening of confinement gaps up to 0.5 eV, enabling room-temperature operation of graphene nanoribbon-based devices, is reported. This method avoids the difficulties of assembling nanoscale components and may prove useful in the realization of complete integrated circuits, operating as room-temperature ballistic electronic devices(6,7).

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Physical Science > Nanoelectronics
Material Science > Nanostructured materials
ID Code:2377
Deposited By:Anuj Seth
Deposited On:17 Dec 2008 14:00
Last Modified:20 Jan 2009 10:27

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