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首页> 外文期刊>Applied optics >Spectral resolution of molecular ensembles under ambient conditions using surface plasmon coupled fluorescence emission
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Spectral resolution of molecular ensembles under ambient conditions using surface plasmon coupled fluorescence emission

机译：使用表面等离子体激元耦合荧光发射在环境条件下分子集成体的光谱分辨率

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摘要

We report the ability to spectrally resolve excited-state ensembles of pyranine (Py) utilizing nanometer-thick metal films as a low-cost analytical tool. Surface plasmon coupling allows to mitigate the effect of spectral broadening that is responsible for blurring the emission spectrum at room temperature, a situation common in conventional fluorescence spectroscopy. The approach is especially useful in the case when several excited-state species are present. Fluorescence emission from closely located protonated, deprotonated, and excimer species of Py couple into surface plasmons and are easily separated and observed with 11-14 fold intensity enhancements. Furthermore, the ultranarrowband photon-sorting of emission from microenvironments in a multispecies system is performed in this study using instruments that are readily available in most laboratories without employing any deconvolution procedure and/or additional dispersive optics.
机译：我们报告了利用纳米厚的金属膜作为低成本分析工具来光谱解析吡喃（Py）激发态集合的能力。表面等离激元耦合可以减轻光谱加宽的影响，而光谱加宽导致室温下的发射光谱模糊，这是常规荧光光谱中常见的情况。当存在几种激发态物质时，该方法特别有用。来自紧密定位的Py的质子化，去质子化和受激准分子的荧光发射耦合到表面等离激元，并且容易分离并观察到11-14倍的强度增强。此外，本研究使用大多数实验室中容易获得的仪器，对多物种系统中的微环境发射的超窄带光子进行了分选，而无需使用任何反褶积程序和/或其他色散光学器件。

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