荧光聚电解质包覆的银纳米簇：优化与光谱评估
Fluorescent Polyelectrolyte Capped Silver Nanoclusters: Optimization and Spectroscopic Evaluation.
作者信息
Raut Sangram, Rich Ryan, Akopova Irina, Thyrhaug Erling, Shtoyko Tanya, Shumilov Dimytro, Gryczynski Zygmunt, Gryczynski Ignacy
机构信息
Center for Commercialization of Fluorescence Technologies, University of North Texas Health Science Center, 3500 Camp Bowie Blvd. Fort Worth, Texas, USA, 76107.
出版信息
Chem Phys Lett. 2012 Oct 11;549:72-76. doi: 10.1016/j.cplett.2012.08.042.
In the present work, we have synthesized water soluble Ag nanoclusters using PMAA as a template with different Ag+: COO-ratios, to optimize it for highest brightness using less UV exposure time. Fluorescence polarization was 0.30 for and was found to vary with excitation and emission wavelength with few hundred picoseconds average fluorescence lifetime. Fluorescence Correlation Spectroscopy data depicts slower diffusion at red excitation compared to blue excitation in confocal volume than conventionally synthesized colloids proving presence of multiple sizes. The optical properties of the particles are dependent upon the excitation wavelength used and the emission wavelength collected.
在本工作中，我们使用聚甲基丙烯酸（PMAA）作为模板，以不同的Ag⁺:COO⁻比例合成了水溶性银纳米团簇，以通过较少的紫外线照射时间将其优化至最高亮度。其荧光偏振度为0.30，并且发现其随激发和发射波长而变化，平均荧光寿命为几百皮秒。荧光相关光谱数据表明，与传统合成的胶体相比，在共聚焦体积中，红色激发下的扩散比蓝色激发下的扩散更慢，这证明存在多种尺寸。颗粒的光学性质取决于所使用的激发波长和所收集的发射波长。
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