title: DNA with Ionic, Atomic, and Clustered Silver: An XPS Study.
abstract: The rapidly developing field of bionanotechnology requires detailed knowledge of the mechanisms of interaction between inorganic matter and biomolecules. Under conditions different from those in an aqueous solution, however, the chemistry of these systems is elusive and may differ dramatically from their interactions in vitro and in vivo. Here, we report for the first time a photoemission study of a metal silver-DNA interface, formed in vacuo, in comparison with DNA-Ag+and fluorescent DNA-Ag complexes formed in solution. The high-resolution photoelectron spectra reveal that in vacuo silver atoms interact mainly with oxygen atoms of the phosphodiester bond and deoxyribose in DNA, in contrast to the behavior of silver ions, which interact preferentially with the nitrogen atoms of the bases. This offers new insight into the mechanism of DNA metallization, which is of importance in creating metal-bio interfaces for nanotechnology applications.
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Ivan L
authors.identifier: 0000-0001-7288-6363
authors.initials: IL
authors.lastname: Volkov
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Anastasiya
authors.identifier: 0000-0001-8292-0561
authors.initials: A
authors.lastname: Smirnova
authors.affiliation: Institut für Festkörperphysik, Technische Universität Dresden , 01062 Dresden, Germany.
authors.forename: Anna A
authors.identifier: 0000-0002-5603-5566
authors.initials: AA
authors.lastname: Makarova
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Zakhar V
authors.identifier: 0000-0001-5475-3030
authors.initials: ZV
authors.lastname: Reveguk
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Ruslan R
authors.identifier: 0000-0002-3019-8762
authors.initials: RR
authors.lastname: Ramazanov
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Dmitry Yu
authors.identifier: 0000-0003-0390-0007
authors.initials: DY
authors.lastname: Usachov
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Vera K
authors.identifier: 0000-0001-9413-9721
authors.initials: VK
authors.lastname: Adamchuk
authors.affiliation: Saint-Petersburg State University , 199034 St. Petersburg, Russia.
authors.forename: Alexei I
authors.identifier: 0000-0001-5787-3599
authors.initials: AI
authors.lastname: Kononov
mesh_terms: D002414:Cations, Monovalent / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D005453:Fluorescence; D009584:Nitrogen / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D012834:Silver / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry*
chemical_list: D002414:Cations, Monovalent; D012834:Silver; D004247:DNA; D012835:Silver Nitrate; D009584:Nitrogen; D010100:Oxygen