Toward Theorectical Limits of FT-IR Microspectroscopy for Ultra-Thin Organic Layers
Toward Theorectical Limits of FT-IR Microspectroscopy for Ultra-Thin Organic Layers
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超薄有机层 FT-IR 显微光谱学的理论极限
DOI：
10.1366/0003702934067414
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发表时间：
1993
影响因子：
3.5
通讯作者：
R. Kellner
中科院分区：
文献类型：
--
作者：
B. Mizaikoff;K. Taga;R. Kellner
在这项工作中，基板几何形状对FT-IR微光谱透射测量的影响被报道，特别强调对横向分辨率的影响。在中红外范围内，将具有特定吸收带的有机聚合物液滴（液滴直径为15 ~ 150 μm）喷射到中红外透明纤维（硫化物玻璃）和均匀衬底（硒化锌ATR晶体）上。沿着纤维表面和均匀基材表面的二次扫描，通过在所得等高线图中保持局部信息，给出了分布在表面上的液滴是否出现横向分解的信息。不同显微孔径的扫描结果表明，聚焦红外光束在样品表面的直径与等高线图中水滴图像的展宽之间存在明显的关系。
In this work the influence of the substrate geometry on FT-IR microspectroscopical transmission measurements is reported with special emphasis on the impact on the lateral resolution. Mid-infrared transparent fibers (chalcogenide glass) and even substrates (zinc selenide ATR crystal) were sprayed with drops (drop size distribution: 15 to 150 μm in diameter) of an organic polymer with specific absorption bands in the mid-infrared range. Quadratic scans along the surface of the fiber and of the even substrate gave information about whether the drops distributed on the surface appear laterally resolved, by maintaining the local information in the resulting contour plot. Several scans with different microscopic apertures accentuate the relation between the diameter of the focused IR beam on the sample surface and the broadening of the drop image in the contour plot.