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Electronic transport and thermopower in aperiodic DNA sequences

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Publication Date
2004-07-30
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World Scientific Publ Co Pte Ltd
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A detailed study of charge transport properties of synthetic and genomic DNA sequences is reported. Genomic sequences of the Chromosome 22, lambda-bacteriophage, and D1s80 genes of Human and Pygmy chimpanzee are considered in this work, and compared with both periodic and quasiperiodic (Fibonacci) sequences of nucleotides. Charge transfer efficiency is compared for all these different sequences, and large variations in charge transfer efficiency, stemming from sequence-dependent effects, are reported. In addition, basic characteristics of tunneling currents, including contact effects, are described. Finally, the thermoelectric power of nucleobases connected in between metallic contacts at different temperatures is presented.
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© World Scientific Publ Co Pte Ltd. We warmly thank E. C. Cox for sharing useful materials, and D. Bicout and E. Kat are acknowledged for interesting discussions. This work was partly supported by UCM through Project No. PR3/04-12450
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