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Anisotropic hybrid organic/inorganic (azopolymer/SiO_2 NP) materials with enhanced photoinduced birefringence

机译:具有增强的光致双折射的各向异性混合有机/无机(偶氮聚合物/ SiO_2 NP)材料

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摘要

Hybrid materials based on combination of polymers and inorganic nanoparticles (NP) attracted considerable attention in the last decade due to their advantageous electrical, optical, or mechanical properties. Recently, we reported a significant improvement of the photoresponse by doping azopolymers with ZnO NP. To study the influence of the composition of the dopant, in our present work we have synthesized anisotropic organic/inorganic nanocomposite materials by incorporating 5-15 nm sized SiO_2 NP in a side-chain azopolymer. As a result we observe an enhancement of the photoinduced birefringence in these composite materials with about 20% compared to the nondoped sample. Additionally, we discuss possible mechanisms leading to this enhancement related with the scattering caused by the NP and the increased mobility of the azochromophores in the vicinity of NP.
机译:在过去的十年中,基于聚合物和无机纳米粒子(NP)的混合材料由于其良好的电,光或机械性能而备受关注。最近,我们报道了通过用ZnO NP掺杂偶氮聚合物来显着改善光响应。为了研究掺杂剂组成的影响,在我们目前的工作中,我们通过在侧链偶氮聚合物中掺入5-15 nm尺寸的SiO_2 NP合成了各向异性的有机/无机纳米复合材料。结果,与未掺杂样品相比,我们观察到这些复合材料中的光致双折射增强了约20%。另外,我们讨论了导致这种增强的可能机制,这种增强与NP引起的散射以及NP附近偶氮发色团的迁移率增加有关。

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