Crystalline structure and squeeze-out dissipation of liquid solvation layers observed by small-amplitude dynamic AFM
Crystalline structure and squeeze-out dissipation of liquid solvation layers observed by small-amplitude dynamic AFM
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DOI：
10.1103/physrevb.80.134104
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发表时间：
2009-10-01
影响因子：
3.7
通讯作者：
O'Shea, S. J.
中科院分区：
文献类型：
--
作者：
Hofbauer, W.;Ho, R. J.;O'Shea, S. J.
使用频率调制原子力显微镜（FM-AFM）在亚纳米的振动振幅，我们发现在系统中的正十二烷醇/石墨，溶剂化层可以延伸到几个纳米的散装液体。这些层保持可以使用FM-AFM成像的晶体顺序。振动尖端的能量耗散可以在穿透分子层时急剧达到峰值。头端形状对于该效应似乎至关重要。
Using frequency-modulation atomic force microscopy (FM-AFM) at sub-nanometer vibration amplitudes, we find in the system n-dodecanol/graphite that solvation layers may extend for several nanometers into the bulk liquid. These layers maintain crystalline order which can be imaged using FM-AFM. The energy dissipation of the vibrating tip can peak sharply upon penetration of molecular layers. The tip shape appears critical for this effect.