Effect of interfacial liquid structuring on the coherence length in nanolubrication.
Phys Rev Lett
; 88(15): 154302, 2002 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-11955199
ABSTRACT
The degree of interfacial structuring of n-hexadecane and octamethylcyclotetrasiloxane (OMCTS) was measured within a nanometer boundary regime to silicon surfaces. Boundary-layer effects on lubricating sliding (in terms of a thermodynamic stress activation parameter) and the layer thickness were determined by scanning force microscopy. A 2.0+/-0.3 nm thick, entropically cooled layer was found for n-hexadecane. Measurements on spherically shaped OMCTS molecules exhibited only an interfacial "monolayer," and identified the molecular shape of n-hexadecane responsible for augmented interfacial structuring. Interfacial liquid structuring was found to reduce friction.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article