We present a theoretical model accounting for the anomalous Fabry-Pérot pattern observed in the ballistic conductance of a single-wall carbon nanotube. Using the scattering field theory, it is shown that the presence of a limited number of impurities along the nanotube can be identified by a measurement of the conductance and their position can be determined. Impurities can be made active or silent depending on the interaction with the substrate via the back gate. The conceptual steps for designing a biomolecule detector are briefly discussed.
Effect of impurities on Fabry-Pérot physics of ballistic carbon nanotubes
ROMEO, FRANCESCO;CITRO, Roberta
;DI BARTOLOMEO, Antonio
2011-01-01
Abstract
We present a theoretical model accounting for the anomalous Fabry-Pérot pattern observed in the ballistic conductance of a single-wall carbon nanotube. Using the scattering field theory, it is shown that the presence of a limited number of impurities along the nanotube can be identified by a measurement of the conductance and their position can be determined. Impurities can be made active or silent depending on the interaction with the substrate via the back gate. The conceptual steps for designing a biomolecule detector are briefly discussed.File in questo prodotto:
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