TY  - JOUR
AU  - Krass, Marc-Dominik
AU  - Gosvami, Nitya Nand
AU  - Carpick, Robert W
AU  - Müser, Martin
AU  - Bennewitz, Roland
TI  - Dynamic shear force microscopy of viscosity in nanometer-confined hexadecane layers
JO  - Journal of physics / Condensed matter
VL  - 28
IS  - 13
SN  - 1361-648X
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2016-02106
SP  - 134004 -
PY  - 2016
AB  - Hexadecane exhibits pronounced molecular layering upon confinement to gaps of a few nanometer width which is discussed for its role in boundary lubrication. We have probed the mechanical properties of the confined layers with the help of an atomic force microscope, by quasi-static normal force measurements and by analyzing the lateral tip motion of a magnetically actuated torsional cantilever oscillation. The molecular layering is modeled by a oscillatory force curve and the tip approach is simulated assuming thermal equilibrium correlations in the liquid. The shear response of the confined layers reveals gradually increasing stiffness and viscous dissipation for a decreasing number of confined layers.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000371905200008
DO  - DOI:10.1088/0953-8984/28/13/134004
UR  - https://juser.fz-juelich.de/record/807075
ER  -