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Fabrication of carbon nanotube nanogap electrodes by helium ion sputtering for molecular contacts

Thiele, Cornelius and Vieker, Henning and Beyer, André and Flavel, Benjamin S. and Hennrich, Frank and Muñoz Torres, David and Eaton, Thomas R. and Mayor, Marcel and Kappes, Manfred M. and Gölzhäuser, Armin and Löhneysen, Hilbert v. and Krupke, Ralph. (2014) Fabrication of carbon nanotube nanogap electrodes by helium ion sputtering for molecular contacts. Applied Physics Letters, 104 (10). p. 103102.

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Official URL: http://edoc.unibas.ch/dok/A6337620

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Abstract

Carbon nanotube nanogaps have been used to contact individual organic molecules. However, the reliable fabrication of a truly nanometer-sized gap remains a challenge. We use helium ion beam lithography to sputter nanogaps of only (2.8 ± 0.6) nm size into single metallic carbon nanotubes embedded in a device geometry. The high reproducibility of the gap size formation provides a reliable nanogap electrode testbed for contacting small organic molecules. To demonstrate the functionality of these nanogap electrodes, we integrate oligo(phenylene ethynylene) molecular rods, and measure resistance before and after gap formation and with and without contacted molecules.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Molecular Devices and Materials (Mayor)
UniBasel Contributors:Mayor, Marcel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
ISSN:0003-6951
e-ISSN:1077-3118
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:05 Apr 2017 09:56
Deposited On:06 Feb 2015 09:59

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