Cross-Sectional Structure of Liquid 1-Decanol over Graphite
Cross-Sectional Structure of Liquid 1-Decanol over Graphite
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DOI：
10.1021/jp310203s
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发表时间：
2012-12
影响因子：
3.7
通讯作者：
Takumi Hiasa;K. Kimura;H. Onishi
中科院分区：
文献类型：
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作者：
Takumi Hiasa;K. Kimura;H. Onishi
用调频原子力显微镜(FM-AFM)研究了石墨与液体正十二醇的界面。用亚分子分辨跟踪了外延物理吸附在底物上的正十二醇的形貌。在液体中监测尖端-表面力作为尖端的垂直和横向坐标的函数，以揭示界面十醇的横截面结构。通过垂直调制力分布来识别四个或更多液层。第一和第二液层在横向上是不均匀的，力分布沿侧向坐标周期性地调制就是明证。根据氢键和范德华相互作用获得的能量，提出了一种可能的结构机理。
The interface of graphite and liquid 1-decanol was studied using frequency modulation atomic force microscopy (FM-AFM). The topography of epitaxially physisorbed decanol on the substrate was traced with submolecular resolution. The tip–surface force was monitored in the liquid as a function of the vertical and lateral tip coordinates to reveal the cross-sectional structure of the interfacial decanol. Four or more liquid layers were identified by vertically modulated force distributions. The first and second liquid layers were laterally heterogeneous, as evidenced by a force distribution that was periodically modulated along lateral coordinates. A possible structuring mechanism is proposed on the basis of energy gain by hydrogen bonding and van der Waals interactions.