力谱学
弯月面
润滑油
原子力显微镜
硅油
表面张力
表面力仪
材料科学
成核
纳米技术
化学
复合材料
光学
热力学
物理
有机化学
入射(几何)
作者
Sam Peppou-Chapman,Christopher Vega-Sánchez,Chiara Neto
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-08-12
卷期号:38 (33): 10234-10243
标识
DOI:10.1021/acs.langmuir.2c01411
摘要
So far, the presence of nanobubbles on lubricant-infused surfaces (LIS) has been overlooked, because of the difficulty in detecting them in such a complex system. We recently showed that anomalously large interfacial slip measured on LIS is explained by the presence of nanobubbles [Vega-Sánchez, Peppou-Chapman, Zhu and Neto, Nat. Commun., 202213, 351]. Crucial to drawing this conclusion was the use of atomic force microscopy (AFM) force-distance spectroscopy (meniscus force measurements) to directly image nanobubbles on LIS. This technique provided vital direct evidence of the spontaneous nucleation of nanobubbles on lubricant-infused hydrophobic surfaces. In this paper, we describe in detail the data collection and analysis of AFM meniscus force measurements on LIS and show how these powerful measurements can quantify both the thickness and distribution of multiple coexisting fluid layers (i.e., gas and oil) over a nanostructured surface. Using this technique, thousands of force curves were automatically analyzed. The results show that the interfacial tension of the nanobubbles is reduced from 52 ± 9 mN m-1 to 39 ± 4 mN m-1 by the presence of the silicone oil layer.
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