Journal
ACS NANO
Volume 3, Issue 7, Pages 1729-1734Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn900288d
Keywords
graphene; dielectrophoresis; directed assembly; bottom-up
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Funding
- Initiative and Networking Fund of the Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
- Royal Society and European Research Council grant NANOPOTS
- Fondazione CARIPLO
- Politecnico di Milano
- Palermo University
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We establish the use of dielectrophoresis for the directed parallel assembly of individual flakes and nanoribbons of few-layer graphene into electronic devices. This is a bottom-up approach where source and drain electrodes are prefabricated and the flakes are deposited from a solution using an alternating electric field applied between the electrodes. These devices are characterized by scanning electron microscopy, atomic force microscopy, Raman spectroscopy, and electron transport measurements. They are electrically active and their current carrying capacity and subsequent failure mechanism is revealed. Akin to carbon nanotubes, we show that the dielectrophoretic deposition is self-limiting to one flake per device and is scalable to ultralarge-scale integration densities, thereby enabling the rapid screening of a large number of devices.
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