Current-voltage characterization has been made of circular deoxyribonucleic acid (DNA) bundle samples embedded in a water solution lying on a nylon porous membrane between vacuum-evaporated gold electrodes. The nonlinear behaviour observed at room temperature on samples of different molecular sizes and variable concentration has been interpreted as a long-range conduction mechanism that takes place by means of charge hopping through the network of molecules. A tunneling process acting as an additional transport channel inside single molecules between energetically appropriate bases has been inferred. Characteristic energies involved in the transport have also been reproducibly measured.
DNA as a possible new material for electronics and photonics
Romano P;Sabatino L;Colantuoni V
2008-01-01
Abstract
Current-voltage characterization has been made of circular deoxyribonucleic acid (DNA) bundle samples embedded in a water solution lying on a nylon porous membrane between vacuum-evaporated gold electrodes. The nonlinear behaviour observed at room temperature on samples of different molecular sizes and variable concentration has been interpreted as a long-range conduction mechanism that takes place by means of charge hopping through the network of molecules. A tunneling process acting as an additional transport channel inside single molecules between energetically appropriate bases has been inferred. Characteristic energies involved in the transport have also been reproducibly measured.| File | Dimensione | Formato | |
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