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Quantitative measurement of solvation shells using frequency modulated atomic force microscopy

机译：调频原子力显微镜对溶剂化壳的定量测量

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摘要

The nanoscale specificity of interaction measurements and additional imaging capability of the atomic force microscope make it an ideal technique for measuring solvation shells in a variety of liquids next to a range of materials. Unfortunately, the widespread use of atomic force microscopy for the measurement of solvation shells has been limited by uncertainties over the dimensions, composition and durability of the tip during the measurements, and problems associated with quantitative force calibration of the most sensitive dynamic measurement techniques. We address both these issues by the combined use of carbon nanotube high aspect ratio probes and quantifying the highly sensitive frequency modulation (FM) detection technique using a recently developed analytical method. Due to the excellent reproducibility of the measurement technique, additional information regarding solvation shell size as a function of proximity to the surface has been obtained for two very different liquids. Further, it has been possible to identify differences between chemical and geometrical effects in the chosen systems.
机译：相互作用测量的纳米级特异性和原子力显微镜的附加成像功能使其成为测量多种材料中紧邻多种材料的溶剂化壳的理想技术。不幸的是，原子力显微镜在溶剂化壳测量中的广泛应用受到测量期间尖端尺寸，组成和耐用性的不确定性以及与最灵敏的动态测量技术的定量力校准相关的问题的限制。我们通过结合使用碳纳米管高纵横比探针并使用最近开发的分析方法量化高灵敏度频率调制（FM）检测技术来解决这两个问题。由于测量技术的出色再现性，对于两种截然不同的液体，已经获得了有关溶剂化壳尺寸随表面亲近性变化的其他信息。此外，有可能确定所选系统中化学和几何效应之间的差异。

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