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首页> 外文会议>Conference on nanobiosystems: Processing, characterization, and applications IX >Tunable lasers based on hemicyanines embedded in DNA complex
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Tunable lasers based on hemicyanines embedded in DNA complex

机译：基于嵌入在DNA复合物中的血清腺的可调谐激光器

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Fluorescence yields of many organic dyes are enhanced via incorporation into DNA-surfactant complex which also extends the lifetime of the dyes. We have developed wavelength tunable lasers with hemicyanine dyes embedded in DNA-cetyltrimethylammonium (DNA-CTMA). A couple of methods were applied to the dye doping, leading to different modes of interaction with DNA or its complex. Even though optical properties depended on the material structure reflecting preparation method, dyes showed good performance as laser media in various cases. Therefore, it is important to study the details of their interaction mechanism and the effects on their lasing performance. In order to investigate the interaction mode, three types of dyes were employed, that is, 4-[4-(dimethylamino)stylyl]-l-methylpyridinium iodide (DMASMPI or p-Hemil), 2-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (o-Hemil), and 2-(4-dimethylaminostyryl)-l-ethylquinolinium iodide (Quinaldine Red). Strong fluorescence enhancement and spectral shift of the dyes interacting with DNA in water suggested the importance of direct binding to DNA, while the dyes showed strongest fluorescence emission without significant spectral shift when interacting with DNA-CTMA in ethanol. The facts implied that multiple origins of fluorescence enhancement could be applicable to build up lasers. DNA-CTMA thin films incorporating the dyes were fabricated with several different methods aiming to control the interaction modes of the dye. p-Hemil doped thin films with 'immersion method' gave light amplification and laser oscillations in the range 590-620nm under optical pumping. The films operated more than 1 hour before the output stimulated emission diminished, showing strong durability of the dye in the complex.
机译：通过掺入DNA-表面活性剂络合物中，增强了许多有机染料的荧光产率，其也延伸了染料的寿命。我们已经开发了嵌入DNA-十六烷基三甲基铵（DNA-CTMA）中的半氰胺染料的波长可调激光。将几种方法应用于染料掺杂，导致与DNA或其复合物的不同的相互作用方式。尽管光学性质依赖于反映制备方法的材料结构，但在各种情况下，染料在激光介质中表现出良好的性能。因此，研究其相互作用机制的细节和对激光性能的影响非常重要。为了研究相互作用模式，采用三种类型的染料，即4- [4-（二甲基氨基）苯乙醇] -L-甲基吡啶碘化物（DMASMPI或P-HEMIL），2- [4-（二甲基氨基）Styryl ] -1-甲基吡啶碘化物（O-HEMIL）和2-（4-二甲基氨基苯胺酰基）-1-乙基喹啉碘化物（喹啉红氨基）。与水中DNA相互作用的染料的强荧光增强和光谱偏移表明直接结合DNA的重要性，而在与乙醇中的DNA-CTMA相互作用时，染料在没有显着的光谱移位的情况下显示出最强的荧光发射。事实暗示荧光增强的多次起源可以适用于积聚激光器。掺入染料的DNA-CTMA薄膜用旨在控制染料的相互作用模式的几种不同的方法制备。 P-HEMIL掺杂薄膜，具有“浸入方法”的光放大和激光振荡，在光学泵送下590-620nm的范围内。薄膜在输出刺激排放减少前超过1小时，显示染料在复合物中的强耐久性。

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