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Surface modified ZrO_2 and TiO_2 nanoparticles embedded in organic photopolymers for highly effective and UV-stable volume holograms

机译:嵌入有机光聚合物中的表面改性ZrO_2和TiO_2纳米颗粒,可实现高效且紫外线稳定的体积全息图

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The improved synthesis of large quantities of small (hydrodynamic diameter 6-8 nm) TiO_2 and ZrO_2 nanoparticles tailored as a high refractive index agent in holographic acrylate photopolymer composites has been developed. The surface of the particles was modified by p-dodecylbenzenesulfonic acid (organic shell weight fraction is about 50-70 percent) to render them highly compatible with organic monomer mixtures avoiding aggregation. The exposure to the interference pattern provides fast one-step formation of permanent highly efficient volume phase gratings with excellent transparency in the visible range. A high refractive index modulation amplitude n of about 0.0165 has been achieved in the composites containing 25 wt percent of TiO_2 nanoparticles. The level of light scattering in the gratings does not exceed 8-10 percent compared to the film without nanoparticles. The holographic grating based on acrylates doped with ZrO_2 nanoparticles, first employed in this work, exhibited high photostability in contrast to holographic nanocomposites with TiO_2 nanoparticles. Possible applications of such photocurable organic-inorganic nanocomposites are holographic diffractive elements for a number of optical and electro-optical applications or devices based on ordered arrays of functional nanoparticles within organic films.
机译:已经开发出改进的合成全息图丙烯酸酯光聚合物复合材料中大量用作高折射率剂的小尺寸(流体力学直径6-8 nm)TiO_2和ZrO_2纳米粒子的方法。颗粒的表面用对十二烷基苯磺酸(有机壳的重量分数约为50-70%)改性,使它们与有机单体混合物高度相容,从而避免了聚集。干涉图案的曝光提供了永久高效的体积相位光栅的快速一步形成,在可见范围内具有极好的透明度。在包含25wt%的TiO 2纳米颗粒的复合物中,已经实现了约0.0165的高折射率调制幅度n 1。与没有纳米颗粒的薄膜相比,光栅中的光散射水平不超过8-10%。这项工作中首次使用的基于掺有ZrO_2纳米粒子的丙烯酸酯的全息光栅与具有TiO_2纳米粒子的全息纳米复合材料相比,具有较高的光稳定性。这种可光固化的有机-无机纳米复合材料的可能应用是用于基于有机膜内功能纳米粒子的有序阵列的许多光学和电光应用或装置的全息衍射元件。

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