Wetting Behavior at Micro-/Nanoscales: Direct Imaging of a Microscopic Water/Air/Solid Three-Phase Interface

被引：46

作者：

Chen, Peipei ^{[1
,3
]}

Chen, Long ^{[1
]}

Han, Dong ^{[1
]}

Zhai, Jin ^{[2
]}

Zheng, Yongmei ^{[1
]}

Jiang, Lei ^{[2
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Ctr Mol Sci, Inst Chem, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China

来源：

SMALL | 2009年 / 5卷 / 08期

关键词：

AFM; force curves; imaging; lotus leaves; wettability; ATOMIC-FORCE MICROSCOPE; BIOMIMETIC SUPERHYDROPHOBIC SURFACES; HYDROPHOBIC SURFACES; NANOBUBBLES; FILMS; WATER; ROUGHNESS; RUPTURE;

D O I：

10.1002/smll.200801152

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A droplet inside-view method based on a magnetic alternating current (MAC)-mode atomic force microscopy (AFM) system and a force-volume function to directly characterize the microscopic details of the water/air/solid three-phase interface, was reported. The method involved collection of in-situ images of the lotus leaf surfaces in air and in water by MAC-mode AFM. AFM method allowed to use a small force to drive the cantilever of the AFM probe for imaging. The in-situ images showed that when a water-droplet contacted with the surface of a lotus leaf, air layers of nano- or micrometer-scale size survived depending on hierarchical micro-/nanoscale structures. The method provided direct evidence of microscopic wetting behavior dominated the macroscopic wettability of micro-/nanoscale interfaces. It also provided a significant insight for its applications in microscopic investigation of the water/air/solid three-phase interface system.

引用

页码：908 / 912

页数：5

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