NDLI: Lubrication by molecularly thin water films confined between nanostructured membranes

Content Provider	Semantic Scholar
Author	Kalra, Amrit Lal Garde, Shekhar Hummer, Gerhard
Copyright Year	2010
Abstract	Abstract. We use molecular dynamics simulations to study thermal sliding of two nanostructured surfaces separated by nanoscale water films. We find that friction at molecular separations is determined primarily by the effective free energy landscape for motion in the plane of sliding, which depends sensitively on the surface character and the molecular structure of the confined water. Small changes in the surface nanostructure can have dramatic effects on the apparent rheology. Whereas porous and molecularly rough interfaces of open carbon nanotube membranes are found to glide with little friction, a comparably smooth interface of end-capped nanotubes is effectively stuck. The addition of salt to the water layer is found to reduce the sliding friction. Surprisingly, the intervening layers of water remain fluid in all cases, even in the case of high apparent friction between the two membranes.
Starting Page	147
Ending Page	154
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1140/epjst/e2010-01317-9
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1140/epjst/e2010-01317-9
Alternate Webpage(s)	https://doi.org/10.1140/epjst%2Fe2010-01317-9
Volume Number	189
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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