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Single-Electron Force Readout of Nanoparticle Electrometers Attached to Carbon Nanotubes

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journal contribution
posted on 13.08.2008, 00:00 by Jun Zhu, Markus Brink, Paul L. McEuen
We introduce a new technique of probing the local potential inside a nanostructure employing Au nanoparticles as electrometers and using single-electron force microscopy to sense the charge states of the Au electrometers, which are sensitive to local potential variations. The Au nanoelectrometers are weakly coupled to a carbon nanotube through high-impedance molecular junctions. We demonstrate the operation of the Au nanoelectrometer, determine the impedance of the molecular junctions, and measure the local potential profile in a looped nanotube.