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Collective Properties Extend Resistance to Photobleaching of Highly Doped PluS NPs
Author(s) -
Genovese Damiano,
Rampazzo Enrico,
Zaccheroni Nelsi,
Montalti Marco,
Prodi Luca
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700831
Subject(s) - photobleaching , chemistry , brightness , nanoparticle , luminescence , doping , photochemistry , fluorescence , excitation , quenching (fluorescence) , context (archaeology) , fluorescence recovery after photobleaching , nanotechnology , chemical physics , optoelectronics , optics , materials science , physics , paleontology , quantum mechanics , biology
Dye‐doped nanoparticles (NPs) are intriguing fluorescent systems in which collective properties can arise, which are ascribable to the ensemble of dyes rather than to individual ones. Collective properties can be tailored to increase brightness and introduce photophysical versatility. In this context, self‐quenching has long been regarded as the phenomenon to avoid. Here we report on the possibility to profit from a property stemming from self‐quenching: nanoparticles with a high number of dyes per NP (including self‐quenched dyes) display much slower photobleaching compared to nanoparticles with a lower doping degree. In this way, their emission intensity can be kept almost constant for ten times longer. This extended duration of luminescence is due to preferential photobleaching of self‐quenched fluorophores. These observations can shine new light on the use of highly dye‐doped nanoparticles as long‐lasting, super‐photostable probes under strong excitation conditions.