Squeeze-out of branched alkanes on graphite

被引：18

作者：

Gosvami, N. N. ^{[1
]}

Sinha, S. K. ^{[1
]}

O'Shea, S. J. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

[2] Inst Mat Res & Engn, Singapore 117602, Singapore

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.100.076101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study squalane and heptamethylnonane (HMN) confined between a conducting atomic force microscope tip and a graphite surface. Solvation layering occurs for both liquids but marked differences in the squeeze out mechanics are observed for ordered or disordered monolayers. The squalane monolayer at 25 degrees C is an ordered solid, as verified by direct imaging, and the squeeze out can be modeled using elastic continuum mechanics. HMN is in a disordered state at 25 degrees C and cannot be modeled as a single elastic asperity even in solid-solid contact because HMN liquid is trapped in the contact zone.

引用

页数：4

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