Tribological Properties of Alkoxyl Monolayers on Oxide Terminated Silicon

The tribological properties of alkoxyl monolayers on oxide terminated silicon surfaces have been investigated using interfacial force microscopy. For a C18 alkoxyl monolayer, both adhesion and frictional properties are similar to those of a self-assembled monolayer of octadecanethiol on gold. Fricti...

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Bibliographic Details
Published in:Tribology letters 2003-05, Vol.14 (4), p.237-244
Main Authors: Major, Ryan C, Kim, H I, Houston, JE, Zhu, X-Y
Format: Article
Language:English
Subjects:
Adhesion
Gold
Mechanical properties
Monolayers
Self-assembled monolayers
Self-assembly
Shear strength
Silicon
Tribology
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Summary:The tribological properties of alkoxyl monolayers on oxide terminated silicon surfaces have been investigated using interfacial force microscopy. For a C18 alkoxyl monolayer, both adhesion and frictional properties are similar to those of a self-assembled monolayer of octadecanethiol on gold. Friction is shown to increase as the alkyl chain length of the molecules decreases. Analysis using contact mechanics models has been carried out to estimate reduced modulus, adhesion energy, and friction shear strength. These interfacial mechanical properties are correlated to molecular structures at the interface.
ISSN:1023-8883
1573-2711
DOI:10.1023/A:1022628700342