Collective Properties Extend Resistance to Photobleaching of Highly Doped PluS NPs,European Journal of Inorganic Chemistry

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Collective Properties Extend Resistance to Photobleaching of Highly Doped PluS NPs
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2017-09-13 , DOI: 10.1002/ejic.201700831
Damiano Genovese ₁ , Enrico Rampazzo ₁ , Nelsi Zaccheroni ₁ , Marco Montalti ₁ , Luca Prodi ₁

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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.

中文翻译：

集体特性扩展了高掺杂 Plus NPs 对光漂白的抵抗力

染料掺杂的纳米粒子 (NPs) 是一种有趣的荧光系统，其中可以产生集体特性，这归因于染料的整体而不是单个染料。可以定制集体属性以增加亮度并引入光物理多功能性。在此背景下，自淬火一直被视为应避免的现象。在这里，我们报告了从自淬火产生的特性中获益的可能性：与具有较低掺杂度的纳米颗粒相比，每个 NP（包括自淬火染料）具有大量染料的纳米颗粒显示出更慢的光漂白。通过这种方式，它们的发射强度可以保持几乎恒定十倍的时间。这种延长的发光持续时间是由于自淬灭荧光团的优先光漂白。

更新日期：2017-09-13

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