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首页> 外文期刊>Journal of Materials Engineering and Performance >Nonlocal Effects in the Confocal μ-Raman Characterization of Inhomogeneous Polymer Coatings
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Nonlocal Effects in the Confocal μ-Raman Characterization of Inhomogeneous Polymer Coatings

机译：非均质聚合物涂层共焦μ-拉曼表征中的非局部效应

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摘要

The confocal μ-Raman technique was used to characterize the morphology of inhomogeneous anti-graffiti coatings; for these systems, the antiadherent molecules were segregated to the external (exposed) surface forming a layer whose thickness was determined. The confocal data from these inhomogeneous coatings contains nonlocal contributions because the light scattered from sources near the specific specimen under analysis (the focused region) could not be completely rejected by the spatial filter of the confocal device. These nonlocal contributions had important effects in the Raman spectra, modifying the bands height profiles of homogeneous and inhomogeneous materials allowing their identification. Taking into account these nonlocal effects, it was possible to interpret correctly the relative intensities of the Raman bands and characterize properly the inhomogeneous coatings.
机译：共焦μ-拉曼技术用于表征不均匀的抗涂鸦涂层的形态。对于这些系统，抗粘连分子被隔离在外表面（暴露的表面），形成一层厚度已确定的层。来自这些不均匀涂层的共焦数据包含非局部贡献，因为从被分析的特定样本附近（聚焦区域）附近的光源散射的光不能被共焦设备的空间滤光器完全拒绝。这些非局部贡献在拉曼光谱中具有重要作用，从而修改了均质和非均质材料的能带高度分布，从而可以对其进行识别。考虑到这些非局部效应，有可能正确地解释拉曼带的相对强度并正确表征不均匀涂层。

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