DNA Stabilizes Eight-Electron Superatom Silver Nanoclusters with Broadband Downconversion and Microsecond-Lived Luminescence
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DNA oligomers are known to serve as stabilizing ligands for silver nanodusters (Ag-N-DNAs) with rod-like nanoduster 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. This work demonstrates the important role that nanoduster composition and geometry play in dictating luminescence properties of Ag-N-DNAs and significantly expands the space of structure-property relations that can be achieved for Ag-N-DNAs.
Original language | English |
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Journal | Journal of Physical Chemistry Letters |
Volume | 13 |
Issue number | 35 |
Pages (from-to) | 8305-8311 |
Number of pages | 7 |
ISSN | 1948-7185 |
DOIs | |
Publication status | Published - 8 Sep 2022 |
- EXCITATION-SPECTRA, METAL NANOCLUSTERS, GOLD CLUSTERS, FLUORESCENCE, LIGAND, SHAPE
Research areas
ID: 320165399