Abstract
Macia in Chap. 8 discusses the thermoelectric performance of short DNA chains connected between metallic contacts at different temperatures on the basis of effective model Hamiltonians. In case of the single-stranded oligonucleotides composed of three nucleobases (codons) the presence of resonance effects leads to a significant enhancement of the thermoelectric power. This result suggests the possible existence of a thermoelectric signature for different codons of biological interest. The thermoelectric performance of PolyGPolyC and PolyA-PolyT double-stranded chains connected between organic contacts also reveal the existence of important resonance effects, leading to a significant enhancement of the Seebeck coefficient depending on the Fermi level position. High thermoelectric power factors can be obtained close to the resonance energy. The results suggest that significantly high values of the thermoelectric figure of merit may be attained for synthetic DNA samples at room temperature. The possibility of combining p-type and n-type synthetic DNA chains in the design of a nanoscale Peltier cell is considered, taking into account the environmental effects.
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