Ultrabright Supramolecular Beacons Based on the Self-Assembly of Two-Photon Chromophores on Metal Nanoparticles

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 nanopar...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2003-01, Vol.125 (2), p.328-329
Main Authors: Stellacci, Francesco, Bauer, Christina A, Meyer-Friedrichsen, Timo, Wenseleers, Wim, Marder, Seth R, Perry, Joseph W
Format: Article
Language:English
Subjects:
Absorptiometry, Photon - methods
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Nanotechnology - methods
Nitrobenzenes - chemistry
Photons
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Silver - chemistry
Spectrometry, Fluorescence
Spectrophotometry, Infrared
Stilbenes - chemistry
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Summary: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja0281277