Surface modified ZrO2 and TiO2 nanoparticles embedded in organic photopolymers for highly effective and UV-stable volume holograms
Surface modified ZrO2 and TiO2 nanoparticles embedded in organic photopolymers for highly effective and UV-stable volume holograms
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DOI：
10.1088/0957-4484/18/10/105704
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发表时间：
2007-01
期刊：
影响因子：
3.5
通讯作者：
O. Sakhno;L. Goldenberg;J. Stumpe;T. Smirnova
中科院分区：
文献类型：
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作者：
O. Sakhno;L. Goldenberg;J. Stumpe;T. Smirnova
研究了在全息丙烯酸酯光聚合物复合材料中制备大量小颗粒（水动力直径6-8 nm） TiO2和ZrO2纳米粒子的改进方法。用对十二烷基苯磺酸（有机壳重分数约为50-70%）对颗粒表面进行改性，使其与有机单体混合物高度相容，避免聚集。暴露于干涉图案提供了快速一步形成永久高效的体积相位光栅，在可见范围内具有优异的透明度。在含有25 wt% TiO2纳米粒子的复合材料中，获得了约0.0165的高折射率调制幅度n1。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%。与掺杂TiO2纳米粒子的全息纳米复合材料相比，本文首次采用的基于丙烯酸酯掺杂ZrO2纳米粒子的全息光栅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全息衍射元件，用于许多光学和光电应用或基于有机薄膜内功能纳米颗粒的有序阵列的设备。
The improved synthesis of large quantities of small (hydrodynamic diameter 6–8 nm) TiO2 and ZrO2 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%) 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 n1 of about 0.0165 has been achieved in the composites containing 25 wt% of TiO2 nanoparticles. The level of light scattering in the gratings does not exceed 8–10% compared to the film without nanoparticles. The holographic grating based on acrylates doped with ZrO2 nanoparticles, first employed in this work, exhibited high photostability in contrast to holographic nanocomposites with TiO2 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.