% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Mser:173413, author = {Müser, Martin}, title = {{S}ingle-asperity contact mechanics with positive and negative work of adhesion: {I}nfluence of finite-range interactions and a continuum description for the squeeze-out of wetting fluids}, journal = {Beilstein journal of nanotechnology}, volume = {5}, issn = {2190-4286}, address = {Frankfurt, M.}, publisher = {Beilstein-Institut zur Förderung der Chemischen Wissenschaften}, reportid = {FZJ-2014-06823}, pages = {419 - 437}, year = {2014}, abstract = {In this work, single-asperity contact mechanics is investigated for positive and negative work of adhesion Δγ. In the latter case, finite-range repulsion acts in addition to hard-wall constraints. This constitutes a continuum model for a contact immersed in a strongly wetting fluid, which can only be squeezed out in the center of the contact through a sufficiently large normal load FN. As for positive work of adhesion, two stable solutions can coexist in a finite range of normal loads. The competing solutions can be readily interpreted as contacts with either a load-bearing or a squeezed-out fluid. The possibility for coexistence and the subsequent discontinuous wetting and squeeze-out instabilities depend not only on the Tabor coefficient μT but also on the functional form of the finite-range repulsion. For example, coexistence and discontinuous wetting or squeeze-out do not occur when the repulsion decreases exponentially with distance. For positive work of adhesion, the normal displacement mainly depends on FN, Δγ, and μT but – unlike the contact area – barely on the functional form of the finite-range attraction. The results can benefit the interpretation of atomic force microscopy in liquid environments and the modeling of multi-asperity contacts.}, cin = {JSC}, ddc = {620}, cid = {I:(DE-Juel1)JSC-20090406}, pnm = {411 - Computational Science and Mathematical Methods (POF2-411)}, pid = {G:(DE-HGF)POF2-411}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000334373100001}, doi = {10.3762/bjnano.5.50}, url = {https://juser.fz-juelich.de/record/173413}, }