Nazarova Dimana, Nedelchev Lian, Sharlandjiev Peter, Dragostinova Violeta
Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria.
Appl Opt. 2013 Aug 1;52(22):E28-33. doi: 10.1364/AO.52.000E28.
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 SiO2 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.
基于聚合物与无机纳米粒子（NP）组合的杂化材料，因其具有有利的电学、光学或机械性能，在过去十年中受到了广泛关注。最近，我们报道了通过用ZnO NP掺杂偶氮聚合物，光响应有了显著改善。为了研究掺杂剂组成的影响，在我们目前的工作中，我们通过将尺寸为5 - 15 nm的SiO2 NP掺入侧链偶氮聚合物中，合成了各向异性有机/无机纳米复合材料。结果，我们观察到与未掺杂样品相比，这些复合材料中的光致双折射增强了约20%。此外，我们讨论了导致这种增强的可能机制，这与NP引起的散射以及NP附近偶氮发色团迁移率的增加有关。
