There have been many contradictory reports so far on the possible electrical conduction in DNA. The reasons behind may be the ambiguities of the DNA samples and electrical contacts. Regarding the samples, it has been clarified theoretically based on the electronic state calculations that DNA can be carrier doped if samples solutions with the divalent cations are fully dried on the substrates; holes will be doped on guanosines. This finding will open a way to use DNA as semiconductor devices. This report was published in August Issue of J. Phys. Soc. JPN (2004), and in Nikkan-Kogyo Newspaper on August 16, 2004.
Prof. Fukuyama's group (International Frontier Center for Advanced Materials (IFCAM))