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Disentangling optically activated delayed fluorescence and upconversion fluorescence in DNA stabilized silver nanoclusters† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c9sc00865a
| Content Provider | Semantic Scholar |
|---|---|
| Author | Krause, Stefan Cerretani, Cecilia Vosch, Tom |
| Copyright Year | 2019 |
| Abstract | Optically activated delayed fluorescence (OADF) is a powerful tool for generating background-free, anti-Stokes fluorescence microscopy modalities. Recent findings, using DNA-stabilized silver nanoclusters (DNA-AgNCs), indicate that OADF is usually accompanied by a dark state-mediated consecutive photon absorption process leading to upconversion fluorescence (UCF). In this study, we disentangle the OADF and UCF process by means of wavelength-dependent NIR excitation spectroscopy. We demonstrate that, by appropriate choice of secondary NIR excitation wavelength, the dark state population can be preferentially depleted through OADF, minimizing the UCF contribution. These findings show that dark state depletion by OADF might enable background-free STED-like nanoscopy. |
| Starting Page | 5326 |
| Ending Page | 5331 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9sc00865a |
| PubMed reference number | 31191889 |
| Journal | Medline |
| Volume Number | 10 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2019/sc/c9sc00865a |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c9/sc/c9sc00865a/c9sc00865a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c9sc00865a |
| Journal | Chemical science |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
