surface force apparatus
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2019 ◽  
Vol 17 (1) ◽  
pp. 95
Author(s):  
Michele Tricarico ◽  
Antonio Papangelo ◽  
Andrei Constantinescu ◽  
Michele Ciavarella

Adhesion is a key factor in many tribological processes, especially wear.  We generalize a recent formulation for the indentation of a multilayered material using an efficient integral transform method, to the case of adhesion, using a simple energetic transformation in the JKR regime. Then, we specialize the study for the geometry of the Surface Force Apparatus, which consists of two thin layers on a substrate, where the intermediate layer is softer than the other two. We find the pull-off force under "force control" (i.e. for "soft" loading systems), as well as under "displacement control" (i.e. for "rigid" systems), as a function of the geometrical thicknesses and material properties ratios, and the method is fully implemented in a fast Mathematica code, available to the public (see Appendix).


2019 ◽  
Vol 30 (19) ◽  
pp. 195502 ◽  
Author(s):  
Antoine Lainé ◽  
Laetitia Jubin ◽  
Luca Canale ◽  
Lydéric Bocquet ◽  
Alessandro Siria ◽  
...  

Soft Matter ◽  
2019 ◽  
Vol 15 (24) ◽  
pp. 4905-4914
Author(s):  
Weichao Zheng ◽  
Carla Sofia Perez-Martinez ◽  
Gia Petriashvili ◽  
Susan Perkin ◽  
Bruno Zappone

Mechanical micro-confinement of a cholesteric liquid crystal between crossed cylinders produces dislocations, twist transitions and oscillatory structural forces.


2019 ◽  
Vol 21 (37) ◽  
pp. 20571-20581 ◽  
Author(s):  
Li Xiang ◽  
Lu Gong ◽  
Jiawen Zhang ◽  
Ling Zhang ◽  
Wenjihao Hu ◽  
...  

The effects of contact time, solution pH and PEGylation degree on the non-covalent interaction behavior of chitosan are systematically investigated.


PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0197779 ◽  
Author(s):  
Bruno Zappone ◽  
Navinkumar J. Patil ◽  
Marco Lombardo ◽  
Giuseppe Lombardo

2018 ◽  
Vol 206 ◽  
pp. 443-457 ◽  
Author(s):  
Léo Garcia ◽  
Léa Jacquot ◽  
Elisabeth Charlaix ◽  
Benjamin Cross

Using a dynamic surface force apparatus, we investigate the nano-mechanics and the nano-rheology of an ionic liquid at dielectric and metallic solid surfaces.


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