2015/05/25 by Simon Carpentier, Mário S. Rodrigues, Carpentier, Simon +5
Engineering · Physics and Astronomy · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Force Microscopy Techniques and Applications #Mechanical and Optical Resonators #Nanopore and Nanochannel Transport Studies #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.1505.06566
openalex publication_date 2015/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this article, we measure the viscous damping G'', and the associated\nstiffness G', of a liquid flow in sphere-plane geometry in a large frequency\nrange. In this regime, the lubrication approximation is expected to dominate.\nWe first measure the static force applied to the tip. This is made possible\nthanks to a force feedback method. Adding a sub-nanometer oscillation of the\ntip, we obtain the dynamic part of the interaction with solely the knowledge of\nthe lever properties in the experimental context using a linear transformation\nof the amplitude and phase change. Using a Force Feedback Microscope (FFM)we\nare then able to measure simultaneously the static force, the stiffness and the\ndissipative part of the interaction in a broad frequency range using a single\nAFM probe. Similar measurements have been performed by the Surface Force\nApparatus with a probe radius hundred times bigger. In this context the FFM can\nbe called nano-SFA.\n