Title

Ag Nanocluster Formation Using a Cytosine Oligonucleotide Template

ACS Citation

Ritchie, C. M.; Johnsen, K. R.; Kiser, J. R.; Antoku, Y.; Dickson, R. M.; Petty, J. T. Ag Nanocluster Formation Using a Cytosine Oligonucleotide Template. J. Phys. Chem. C 2007, 111, 175-181.

Abstract

The reduction of silver cations bound to the oligonucleotide dC(12) was used to form silver nanoclusters. Mass spectra show that the oligonucleotides have 2-7 silver atoms that form multiple species, as evident from the number of transitions in the fluorescence and absorption spectra. The variations in the concentrations of the nanoclusters with time are attributed to the changing reducing capacity of the solution, and the formation of oxidized nanoclusters is proposed. Via mass spectrometry and circular dichroism spectroscopy, double-stranded structures with Ag(+)-mediated interactions between the bases are observed, but these structures are not maintained with the reduced nanoclusters. Through variations in the pH, the nanoclusters are shown to bind with the N3 of cytosine.

Source Name

Journal of Physical Chemistry C

Publication Date

1-1-2007

Volume

111

Issue

1

Page(s)

41-49

Document Type

Citation

Citation Type

Article