DNA Stabilizes Eight-Electron Superatom Silver Nanoclusters with Broadband Downconversion and Microsecond-Lived Luminescence.

ABSTRACT: DNA oligomers are known to serve as stabilizing ligands for silver nanoclusters (Ag_N-DNAs) with rod-like nanocluster geometries and nanosecond-lived fluorescence. Here, we report two Ag_N-DNAs that possess distinctly different structural properties and are the first to exhibit only microsecond-lived luminescence. These emitters are characterized by significant broadband downconversion from the ultraviolet/visible to the near-infrared region. Circular dichroism spectroscopy shows that the structures of these two Ag_N-DNAs differ significantly from previously reported Ag_N-DNAs. We find that these nanoclusters contain eight valence electrons, making them the first reported DNA-stabilized luminescent quasi-spherical superatoms. Thi

SUBMITTER: Gonzalez-Rosell A 

PROVIDER: S-EPMC9465679 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature