Fluorescence Amplification in Self-Assembled Organic Nanoparticles by Excitation Energy Migration and Transfer
Fluorescence Amplification in Self-Assembled Organic Nanoparticles by Excitation Energy Migration and Transfer
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通过激发能量迁移和转移增强自组装有机纳米粒子的荧光
DOI：
10.1021/jp102512t
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
C. Giansante
中科院分区：
文献类型：
--
作者：
A. Olive;A. Guerzo;C. Schäfer;C. Belin;G. Raffy;C. Giansante
低分子量有机发色团的自组装发生后，在水中再沉淀，并产生120 nm宽的盘状纳米粒子（NP），如所示的荧光相关光谱（FCS）和原子力显微镜（AFM）。NP能够以纳摩尔浓度掺入先前存在于水中的二萘嵌苯分子，从而开启并敏化其荧光。掺杂的NP显示出非常高的亮度，这是由于它们显著的荧光量子产率（高达48%）、累积的分子吸光度和光捕获过程。荧光偏振光谱还揭示了供体-受体能量转移过程的效率被供体-供体激发能量迁移放大。
The self-assembly of a low molecular weight organic chromophore occurs upon reprecipitation in water and yields 120 nm wide disk-like nanoparticles (NPs), as shown by fluorescence correlation spectroscopy (FCS) and atomic force microscopy (AFM). The NPs are able to incorporate perylene molecules previously present in water at nanomolar concentrations, thus switching ON and sensitizing their fluorescence. The doped NPs display a very high brightness as a result of their significant fluorescence quantum yield (up to 48%), the cumulated molecular absorbance, and the light-harvesting process. Fluorescence polarization spectroscopy also reveals that the efficiency of the donor-to-acceptor energy transfer process is amplified by a donor-to-donor excitation energy migration.