%0 Journal Article
%A Sivebaek, I. M.
%A Samoilov, V. N.
%A Persson, Bo
%T Effective Viscosity of Confined Hydrocarbons
%J Physical review letters
%V 108
%N 3
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2015-04099
%P 036102
%D 2012
%X We 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000299329100019
%R 10.1103/PhysRevLett.108.036102
%U https://juser.fz-juelich.de/record/201805