Photoemission study of poly(dA)-poly(dT) DNA : Experimental and theoretical approach to the electronic density of states

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dc.creatorWadati, Hiroki
dc.creatorOkazaki, Kozo
dc.creatorNiimi, Yasuhiro
dc.creatorFujimori, Atsushi
dc.creatorTabata, Hitoshi
dc.creatorPikus, Jared
dc.creatorLewis, James P.
dc.date2004-09-24
dc.date.accessioned2026-07-07T03:00:59Z
dc.date.available2026-07-07T03:00:59Z
dc.descriptionWe present results of an ultraviolet photoemission spectroscopy study of artificially synthesized poly(dA)-poly(dT) DNA molecules on $p$-type Si substrates. For comparison, we also present the electronic density of states (DOS) calculated using an \emph{ab initio} tight-binding method based on density-functional theory (DFT). Good agreement was obtained between experiment and theory. The spectra of DNA networks on the Si substrate showed that the Fermi level of the substrate is located in the middle of the band gap of DNA. The spectra of thick ($\sim 70$ nm) DNA films showed a downward shift of $\sim 2$ eV compared to the network samples.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0409637
dc.identifierhttp://arxiv.org/abs/cond-mat/0409637
dc.identifierAppl. Phys. Lett. 86, 023901 (2005), Virtual Journal of Biological Physics Research, January 1, 2005
dc.identifierdoi:10.1063/1.1850187
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24931
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titlePhotoemission study of poly(dA)-poly(dT) DNA : Experimental and theoretical approach to the electronic density of states
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