000201805 001__ 201805 000201805 005__ 20210129215920.0 000201805 0247_ $$2doi$$a10.1103/PhysRevLett.108.036102 000201805 0247_ $$2ISSN$$a0031-9007 000201805 0247_ $$2ISSN$$a1079-7114 000201805 0247_ $$2Handle$$a2128/8864 000201805 0247_ $$2WOS$$aWOS:000299329100019 000201805 037__ $$aFZJ-2015-04099 000201805 041__ $$aEnglish 000201805 082__ $$a550 000201805 1001_ $$0P:(DE-HGF)0$$aSivebaek, I. M.$$b0$$eCorresponding Author 000201805 245__ $$aEffective Viscosity of Confined Hydrocarbons 000201805 260__ $$aCollege Park, Md.$$bAPS$$c2012 000201805 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1435233673_9502 000201805 3367_ $$2DataCite$$aOutput Types/Journal article 000201805 3367_ $$00$$2EndNote$$aJournal Article 000201805 3367_ $$2BibTeX$$aARTICLE 000201805 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000201805 3367_ $$2DRIVER$$aarticle 000201805 520__ $$aWe present molecular dynamics friction calculations for confined hydrocarbon films with molecular lengths from 20 to 1400 carbon atoms. We find that the logarithm of the effective viscosity ηeff for nanometer-thin films depends linearly on the logarithm of the shear rate: logηeff=C−nlogγ˙, where n varies from 1 (solidlike friction) at very low temperatures to 0 (Newtonian liquid) at very high temperatures, following an inverse sigmoidal curve. Only the shortest chain molecules melt, whereas the longer ones only show a softening in the studied temperature interval 0<T<900 K. The results are important for the frictional properties of very thin (nanometer) films and to estimate their thermal durability. 000201805 536__ $$0G:(DE-HGF)POF2-424$$a424 - Exploratory materials and phenomena (POF2-424)$$cPOF2-424$$fPOF II$$x0 000201805 588__ $$aDataset connected to CrossRef, juser.fz-juelich.de 000201805 7001_ $$0P:(DE-HGF)0$$aSamoilov, V. 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