Ultrabright Supramolecular Beacons Based on the Self-Assembly of Two-Photon Chromophores on Metal Nanoparticles
- 13 December 2002
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 125 (2) , 328-329
- https://doi.org/10.1021/ja0281277
Abstract
Silver nanoparticles coated with a self-assembled layer of ∼2500 chromophoric alkylthiol ligands, that exhibit a huge per particle two-photon absorption cross section (2.7 × 10-45 cm4 s photon-1) and a high fluorescence quantum yield (0.33), are reported. Polyfunctionalized variants of these nanoparticles have been produced that show reasonable solubility in water/ethanol mixtures. By virtue of the large number of tethered chromophores, these particles act as strongly two-photon absorbing nanobeacons and may have applications in fluorescence imaging and sensing.Keywords
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