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Soft Matter. 2016 Mar 21;12(11):2816-25. doi: 10.1039/c5sm02434j.

Molecularly thin fluoro-polymeric nanolubricant films: tribology, rheology, morphology, and applications.

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Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea.


Molecularly thin perfluoropolyether (PFPE) has been used extensively as a high-performance lubricant in various applications and, more importantly, on carbon overcoats to enhance the reliability and lubrication of micro-/nanoelectro-mechanical systems, where the tribological performance caused by its molecular architecture is a critical issue, as are its physical properties and rheological characteristics. This Highlight addresses recent trends in the development of fluoro-polymeric lubricant films with regard to their tribology, rheology, and physio-chemical properties as they relate to heat-assisted magnetic recording. Nanorheology has been employed to examine the dynamic response of nonfunctional and functional PFPEs, while the viscoelastic properties of nanoscale PFPE films and the relaxation processes as a function of molecular structure and end-group functionality were analyzed experimentally; furthermore, the characteristics of binary blends were reported.


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