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首页> 外文期刊>Applied optics >Effects of prestrain applied to poly(ethylene terephthalate) substrate on microstructures and morphologies of porous TiO2 film and optical scattering behaviors of light
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Effects of prestrain applied to poly(ethylene terephthalate) substrate on microstructures and morphologies of porous TiO2 film and optical scattering behaviors of light

机译：预应力施加于聚对苯二甲酸乙二醇酯基底上对多孔TiO2薄膜的微观结构和形貌以及光的光学散射行为的影响

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摘要

A mold was designed to simulate a thin ceramic film coating on a soft, flexible substrate using a rotating deposition system. With this mold, three prestrains (2%, 4%, and 6%) were applied to a polyethylene terephthalate (PET) substrate before the deposition of a thin TiO2 film. The contact angle of the substrate and, thus, the mean TiO2 particle size were affected by the prestrain. The effects of the mean particle size of TiO2 on the surface roughness and cavity area ratio of the porous film and on the scattering behavior of light were investigated. A goniophotometer and Advanced System Analysis Program were employed for the light analyses of bidirectional scatter distribution functions and their calibration. A spectrometer with an integrating sphere was applied to determine the total scatters (TSs) of transmittance and reflection. An increase in the prestrain increased the mean particle size of TiO2 deposited on the substrate and, thus, the mean surface roughness, cavity/void depth, and cavity area ratio. PET/TiO2 specimens with various prestrains were prepared that satisfy the Harvey-like model but without the isotropic, diffusive property in scatter. The bidirectional transmittance distribution function area and (TS)(transmittance) results are governed by the mean particle size and, thus, the cavity/void geometries and surface roughness. These values decrease with increasing PET prestrain. The bidirectional reflection distribution function area and (TS)(reflection), however, are governed by the adsorbed carbon and its absorption thickness. These values increase with increasing C-1s peak value in x-ray photoelectron spectroscopy spectra. (C) 2015 Optical Society of America
机译：设计了一个模具，以使用旋转沉积系统模拟在柔软的柔性基材上的陶瓷薄膜涂层。使用该模具，在沉积TiO2薄膜之前，将三种预应变（2％，4％和6％）施加到聚对苯二甲酸乙二醇酯（PET）基材上。基材的接触角以及因此的平均TiO2粒径受预应变的影响。研究了二氧化钛的平均粒径对多孔膜表面粗糙度和空腔面积比以及光的散射行为的影响。测角光度计和高级系统分析程序用于双向散射分布函数的光分析及其校准。使用带有积分球的光谱仪确定透射率和反射率的总散射（TSs）。预应变的增加增加了沉积在基底上的TiO2的平均粒径，从而增加了平均表面粗糙度，空腔/空隙深度和空腔面积比。制备了具有各种预应变的PET / TiO2标本，这些标本满足Harvey-like模型，但没有散射的各向同性，扩散特性。双向透射率分布函数区域和（TS）（透射率）结果受平均粒径的控制，因此，由空腔/空隙的几何形状和表面粗糙度决定。这些值随着PET预应变的增加而降低。但是，双向反射分布函数区域和（TS）（反射）取决于吸附的碳及其吸收厚度。这些值随着X射线光电子能谱中C-1s峰值的增加而增加。 （C）2015年美国眼镜学会

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