Gold nanocluster formation using morpholino oligomer as template and assembly agent within hybrid bio-nanomaterials

Saumen Chakraborty, Reginaldo C. Rocha, Anil Desireddy, Kateryna Artyushkova, Timothy C. Sanchez, Albert T. Perry, Plamen Atanassov, Jennifer S. Martinez

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We report the use of a phosphorodiamidate morpholino oligomer as a DNA analogue to template the assembly of a gold nanocluster possessing 6 Au atoms and a diameter of ∼0.9 nm. Spectroscopic characterization indicates that Au preferentially binds to the phosphorodiamidate backbone as opposed to the nucleobases. A high fraction of Au(i) relative to Au(0) is observed by X-ray photoelectron spectroscopy and electrochemistry. This new nanocluster was co-assembled with carbon nanotubes and a fuel-cell enzyme, bilirubin oxidase. The hybrid bio-nanoassembly can reduce O2 to H2O without changing the overpotential of the enzyme.

Original languageEnglish (US)
Pages (from-to)90624-90630
Number of pages7
JournalRSC Advances
Volume6
Issue number93
DOIs
StatePublished - 2016
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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