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Nanotribology of Symmetric and Asymmetric Liquid Lubricants
Tokyo Research Laboratories, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 131-8501, Japan
Received: 15 December 2009; in revised form: 8 February 2010 / Accepted: 20 February 2010 / Published: 15 March 2010
Abstract: When liquid molecules are confined in a narrow gap between smooth surfaces, their dynamic properties are completely different from those of the bulk. The molecular motions are highly restricted and the system exhibits solid-like responses when sheared slowly. This solidification behavior is very dependent on the molecular geometry (shape) of liquids because the solidification is induced by the packing of molecules into ordered structures in confinement. This paper reviews the measurements of confined structures and friction of symmetric and asymmetric liquid lubricants using the surface forces apparatus. The results show subtle and complex friction mechanisms at the molecular scale.
Keywords: nanotribology; friction; surface forces apparatus; confined liquids; lubricants; stick-slip; stiction; confinement-induced phase transitions
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MDPI and ACS Style
Yamada, S. Nanotribology of Symmetric and Asymmetric Liquid Lubricants. Symmetry 2010, 2, 320-345.
Yamada S. Nanotribology of Symmetric and Asymmetric Liquid Lubricants. Symmetry. 2010; 2(1):320-345.
Yamada, Shinji. 2010. "Nanotribology of Symmetric and Asymmetric Liquid Lubricants." Symmetry 2, no. 1: 320-345.