Tailoring the atomic structure of graphene nanoribbons by scanning tunnelling microscope lithography.
By L. Tapasztó, G. Dobrik, P. Lambin, László Péter Biró. Nature Nanotechnology, 2008
863 citations recorded by the source corpus.
The practical realization of nanoscale electronics faces two major challenges: the precise engineering of the building blocks and their assembly into functional circuits. In spite of the exceptional electronic properties of carbon nanotubes, only basic demonstration devices have been realized that require time-consuming processes. 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.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/a30dd823d68499f29cccee393e678a2b01e749a1
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Citations in the corpus
- Colloquium: The transport properties of graphene: An introduction (2010, methodology): “…have been produced by different methods: etching of exfoliated graphene (Han et al., 2007), using chemical reactions (Jiao et al., 2010; Li et al., 2008a), unzipping carbon nanotubes (Kosynkin et al., 2009), and tailoring them by scanning tunneling microscope lithography (Tapasztó et al., 2008).”
- Aligned graphene nanoribbons and crossbars from unzipped carbon nanotubes (2010, background): “2, 3, 4, 5, 6]. Narrow GNRs (sub-10 nm) open up band gaps useful for field effect transistors (FETs) [1, 2, 3, 4]. Several approaches have been developed to make GNRs, such as lithographic patterning [5, 6, 7, 8, 9], sonochemical methods [1, 10], chemical vapor deposition (CVD) [11, 12], nanocutting”