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首页> 外文期刊>RSC Advances >Stacked electrospun polymer nanofiber heterostructures with tailored stimulated emission
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Stacked electrospun polymer nanofiber heterostructures with tailored stimulated emission

机译：堆叠电纺聚合物纳米纤维异质结构，具有量身定制的刺激发射

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摘要

We present stacked organic lasing heterostructures made by different species of light-emitting electrospun fibers, each able to provide optical gain in a specific spectral region. A hierarchical architecture is obtained by conformable layers of fibers with disordered two-dimensional organization and three-dimensional compositional heterogeneity. Lasing polymer fibers are superimposed in layers, showing asymmetric optical behavior from the two sides of the organic heterostructure, and tailored and bichromatic stimulated emission depending on the excitation direction. A marginal role of energy acceptor molecules in determining quenching of high-energy donor species is evidenced by luminescence decay time measurements. These findings show that non-woven stacks of light-emitting electrospun fibers doped with different dyes exhibit critically-suppressed Forster resonance energy transfer, limited at joints between different fiber species. This leads to the obtaining of hybrid materials with mostly physically-separated acceptors and donors, thus largely preventing donor quenching and making it much easier to achieve simultaneous lasing from multiple spectral bands. Coherent backscattering experiments are also performed on the system, suggesting the onset of random lasing features. These new organic lasing systems might find application in microfluidic devices where flexible and bidirectional excitation sources are needed, optical sensors, and nanophotonics.
机译：我们呈现由不同种类的发光电纺纤维制成的堆积的有机激光异质结构，每个都能够在特定光谱区域中提供光学增益。通过具有无序的二维组织和三维组成异质性的纤维层和三维成分异质性获得分层架构。激光聚合物纤维以层叠层叠加，显示来自有机异质结构的两侧的不对称光学行为，并根据激发方向定制和双色刺激的发射。能量受体分子在确定高能量供体物种淬火时的边缘作用是通过发光衰减时间测量来证明的。这些发现表明，掺杂有不同染料的非编织叠层的发光电纺纤维表现出严重抑制的孔谐振能量转移，限制不同纤维物种之间的关节。这导致了具有主要具有物理分离的受体和供体的混合材料，从而大大防止供体淬火并使得能够更容易地从多个光谱带中同时激发。在系统上还执行相干的反向散射实验，表明随机激光功能的发作。这些新的有机激光系统可能在需要柔性和双向激励源，光学传感器和纳米光源中找到应用于微流体装置中的应用。

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  • 来源
    《RSC Advances》 |2018年第43期|共7页
  • 作者

    Sznitko Lech; Romano Luigi; Wawrzynczyk Dominika; Cyprych Konrad; Mysliwiec Jaroslaw; Pisignano Dario;

  • 作者单位

    Wroclaw Univ Sci &

    Technol Fac Chem Wybrzeze Wyspianskiego 27 PL-50370 Wroclaw Poland;

    Univ Salento Dipartimento Matemat &

    Fis Ennio De Giorgi Via Arnesano I-73100 Lecce Italy;

    Wroclaw Univ Sci &

    Technol Fac Chem Wybrzeze Wyspianskiego 27 PL-50370 Wroclaw Poland;

    Wroclaw Univ Sci &

    Technol Fac Chem Wybrzeze Wyspianskiego 27 PL-50370 Wroclaw Poland;

    Wroclaw Univ Sci &

    Technol Fac Chem Wybrzeze Wyspianskiego 27 PL-50370 Wroclaw Poland;

    CNR Ist Nanosci NEST Piazza S Silvestro 12 I-56127 Pisa Italy;

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  • 正文语种 eng
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