Atomic Force Microscopy Measurement of Slip on Smooth Hydrophobic Surfaces and Possible Artifacts

被引:14
作者
Ahmad, Khurshid
Zhao, Xuezeng
Pan, Yunlu [1 ]
Wang, Weijie
Huang, Yuanding
机构
[1] Harbin Inst Technol, Key Lab Microsyst & Microstruct Mfg, Minist Educ, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
INTERFACIAL SLIP; BOUNDARY SLIP; RELIABLE MEASUREMENTS; HYDROPHILIC SURFACES; FILM LUBRICATION; WATER; DENSITY; CHARGE;
D O I
10.1021/acs.jpcc.5b03426
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Slip on hydrophilic and hydrophobic surfaces has been widely studied. Previous studies show a wide range of disagreement over the slip on the smooth hydrophobic surfaces. We have studied the slip on smooth hydrophilic silicon dioxide and hydrophobic octadecyltrichlorosilane (OTS) surfaces immersed in deionized (DI) water and electrolytic solution, using colloid probe atomic force microscopy (CP-AFM). Results suggested a no-slip condition on hydrophilic as well as on hydrophobic surfaces. It was also found that the presence of unknown contaminants causes large uncertainty in the measured slip. Furthermore, we used rectangular as well as V-shaped colloidal probes to study the effect of the shape of AFM cantilever on slip. Results suggested that the shape of colloidal probe does not have an obvious effect on the measured slip lengths.
引用
收藏
页码:12531 / 12537
页数:7
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