Abstract The development of electrospun polymer fiber networks embedded with metal oxide nanoparticles in organic dye media favors the photons waveguiding and multiple scattering, providing the adequate environment for random laser action. The use of water-soluble polymer solution as support for electrospun matrix introduces relevant application in biomedical applications. Herein, it is explored the use of block copolymers (Eudragit L100) as support for electrospinning of polymer fiber doped with titanium dioxide (scatter centers) and rhodamine B (gain media). The resulting fiber net presented random laser behavior that depends on aggregation degree of gain media (rhodamine B) due to the combination of reabsorption/reemission processes with tunable response (emission peak position). These results open new possibilities for use of low-cost and water soluble electrospun-based random lasers based on organic dyes and random network of polymer matrix.

中文翻译：

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用作随机激光发生器的染料掺杂电纺纤维：光斑尺寸和散射浓度的影响

摘要 在有机染料介质中嵌入金属氧化物纳米粒子的电纺聚合物纤维网络的发展有利于光子的波导和多重散射，为随机激光作用提供了适当的环境。使用水溶性聚合物溶液作为静电纺丝基质的支持在生物医学应用中引入了相关应用。在此，探索了使用嵌段共聚物 (Eudragit L100) 作为对掺杂有二氧化钛（散射中心）和罗丹明 B（增益介质）的聚合物纤维进行静电纺丝的支持。由于重吸收/再发射过程与可调响应（发射峰位置）的结合，所得光纤网呈现随机激光行为，该行为取决于增益介质（罗丹明 B）的聚集程度。