Frictional properties of thin chain alcohol films

Journal Article · Mon May 08 04:00:00 EDT 2000 · Journal of Chemical Physics

OSTI ID:775114

Mugele, Friedrich ^[1]; Salmeron, Miquel

---

1. LBNL Library

We used the surface forces apparatus (SFA) to measure the viscosity and friction of confined films of octanol and undecanol as a function of film thickness. We find that strongly surface-bound monolayers form. These monolayers display solid-like stick-slip motion upon shearing. Additional liquid between these monolayers shows liquid-like viscosity. The transition from liquid-like to solid-like friction occurs abruptly upon the expulsion of the last liquid-like layer. For the surface-bound monolayers, the stick-slip motion is investigated as a function of both sliding speed and load. We find a well-defined critical shear stress, which depends only weakly on sliding speed.

• Research Organization: Lawrence Berkeley National Lab., CA (US)
• Sponsoring Organization: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 775114
• Report Number(s): LBNL--45651
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 4 Vol. 114; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALCOHOLS
FRICTION
OCTANOLS
PHASE TRANSFORMATIONS
SHEAR
THICKNESS
VISCOSITY