AFM Study of Water Meniscus Formation between an AFM Tip and NaCl Substrate
AFM Study of Water Meniscus Formation between an AFM Tip and NaCl Substrate
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DOI：
10.1021/jp0401269
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发表时间：
2004-05
影响因子：
3.3
通讯作者：
S. Rozhok;P. Sun;R. Piner;M. Lieberman;C. Mirkin
中科院分区：
文献类型：
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作者：
S. Rozhok;P. Sun;R. Piner;M. Lieberman;C. Mirkin
通过实验研究了 AFM 尖端与原子级光滑的 NaCl 基底之间接触点处的水弯月面形成与大气含水量的函数关系，从 70% 相对湿度到超高真空 (UHV)。通过测量拉出点并评估弯液面溶解接触点附近的 NaCl 的能力（作为大气水含量的函数）来探测弯液面的形成。研究了亲水性和疏水性尖端，尽管观察到疏水性尖端的弯液面尺寸减小，但所有数据与两种类型的尖端一致，导致即使在 0% 相对湿度下也会形成弯月面。
Water meniscus formation at the point of contact between an AFM tip and an atomically smooth NaCl substrate was experimentally studied as a function of atmospheric water content, from 70% relative humidity to ultrahigh vacuum (UHV). Meniscus formation was probed by measuring the pull-off point and evaluating the ability of the meniscus to dissolve the NaCl near the point-of-contact as a function of atmospheric water content. Hydrophilic and hydrophobic tips were studied, and although a decrease in meniscus size was observed for the hydrophobic tips, all data are consistent with both types of tips resulting in the formation of a meniscus even at 0% relative humidity.