Controlled DNA-templated metal deposition: Towards ultra-thin nanowires

Lorenzo Berti, Andrea Alessandrini, Claudia Menozzi, Paolo Facci

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

In this paper, we report the metallization of a dsDNA template using a novel photography-derived two-step strategy in which dsDNA is first complexed with Ag(l) ions and then irradiated with UV light at 254 nm. The nudeobases act as light harvesters and sensitizers, triggering the photoreduction of the complexed silver ions. This process yields a silver nanoparticles blueprint along the DMA strand. The silver latent image is then developed by depositing metallic nickel through an electroless plating process. This photography-derived procedure generates very homogeneous and evenly distributed strings of silver-core/nickel-shell nanoparticles. Although still discontinuous, we believe that such chains can serve as the base for obtaining continuous metal nanowires. Furthermore, this process can most likely be extended to other plating metals, resulting in a broadly general procedure for metallizing DNA with a variety of different materials. Because of the intrinsic simplicity in using light as the key step, this methodology might be amenable to large-scale development, eventually leading to a very efficient molecular-photolithography process.

Original languageEnglish (US)
Pages (from-to)2382-2385
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume6
Issue number8
DOIs
StatePublished - Aug 2006
Externally publishedYes

Keywords

  • DNA Nanowires
  • Electroless Plating
  • Photo-Sensitization
  • Templated Metallization

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Materials Science (miscellaneous)
  • Engineering (miscellaneous)

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