The presented work aimed to investigate the dependence of the fluoroalkyl precursors, used in the sol–gel synthesis of silica-based materials, on the structural and optical properties of the final coating deposited on polyethylene terephthalate foil. The structural properties of the fabricated coatings were analyzed using Raman Spectroscopy, X-ray Photoelectron Spectroscopy, and Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS). The morphology of the samples was investigated using SEM and Atomic Force Microscopy methods. Optical properties were analyzed using ellipsometry and reflectometry. Additionally, the wettability properties with the surface free energy were determined. The cracks-free layers were obtained on the elastic substrate as proved by microscopic observations. The expected chemical structure was confirmed using spectroscopic studies that showed fluoroalkyl chains build into the final structure. The coatings (except the one obtained from the precursor with the longest fluoroalkyl chain) exhibited smooth surfaces and high transparency with a transmittance of 92% in the visible range. They had low refractive indices, which could be tuned in a wide range from 1.435 down to 1.347 (at 633 nm) by changing the fluorinated precursors and increasing the amount of fluorine in the material. A longer fluoroalkyl chain also improved the hydrophobic character of the coating. Such materials have great potential application in flexible photonic structures (for example in photovoltaics).

所介绍的工作旨在研究用于二氧化硅基材料的溶胶-凝胶合成的氟代烷基前体对沉积在聚对苯二甲酸乙二醇酯箔上的最终涂层的结构和光学特性的依赖性。使用拉曼光谱、X 射线光电子光谱和具有能量色散光谱的扫描电子显微镜 (SEM-EDS) 分析制造的涂层的结构特性。使用SEM和原子力显微镜方法研究样品的形态。使用椭圆光度法和反射法分析光学特性。此外，还确定了表面自由能的润湿性。如显微镜观察所证明的，在弹性基材上获得无裂纹层。使用光谱研究证实了预期的化学结构，该研究表明氟烷基链已构建到最终结构中。涂层（除了从具有最长氟代烷基链的前体获得的涂层）表现出光滑的表面和高透明度，在可见光范围内的透射率为 92%。它们具有低折射率，通过改变氟化前体和增加材料中的氟含量，可以在从 1.435 到 1.347（633 nm）的宽范围内进行调整。更长的氟代烷基链也改善了涂层的疏水特性。这种材料在柔性光子结构（例如光伏）中具有巨大的应用潜力。涂层（除了从具有最长氟代烷基链的前体获得的涂层）表现出光滑的表面和高透明度，在可见光范围内的透射率为 92%。它们具有低折射率，通过改变氟化前体和增加材料中的氟含量，可以在从 1.435 到 1.347（633 nm）的宽范围内进行调整。更长的氟代烷基链也改善了涂层的疏水特性。这种材料在柔性光子结构（例如光伏）中具有巨大的应用潜力。涂层（除了从具有最长氟代烷基链的前体获得的涂层）表现出光滑的表面和高透明度，在可见光范围内的透射率为 92%。它们具有低折射率，通过改变氟化前体和增加材料中的氟含量，可以在从 1.435 到 1.347（633 nm）的宽范围内进行调整。更长的氟代烷基链也改善了涂层的疏水特性。这种材料在柔性光子结构（例如光伏）中具有巨大的应用潜力。347（在 633 nm）通过改变氟化前体并增加材料中的氟含量。更长的氟代烷基链也改善了涂层的疏水特性。这种材料在柔性光子结构（例如光伏）中具有巨大的应用潜力。347（在 633 nm）通过改变氟化前体并增加材料中的氟含量。更长的氟代烷基链也改善了涂层的疏水特性。这种材料在柔性光子结构（例如光伏）中具有巨大的应用潜力。