| Autor: |
Agapito, Luis A., Gayles, Jacob, Wolowiec, Christian, Kioussis, Nicholas |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Nanotechnology, Vol 23, Page 135202, Year 2012 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/0957-4484/23/13/135202 |
| Popis: |
We demonstrate that biological molecules such as Watson-Crick DNA base pairs can behave as biological Aviram-Ratner electrical rectifiers because of the spatial separation and weak hydrogen bonding between the nucleobases. We have performed a parallel computational implementation of the ab-initio non-equilibrium Green's function (NEGF) theory to determine the electrical response of graphene---base-pair---graphene junctions. The results show an asymmetric (rectifying) current-voltage response for the Cytosine-Guanine base pair adsorbed on a graphene nanogap. In sharp contrast we find a symmetric response for the Thymine-Adenine case. We propose applying the asymmetry of the current-voltage response as a sensing criterion to the technological challenge of rapid DNA sequencing via graphene nanogaps. |
| Databáze: |
arXiv |
| Externí odkaz: |
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