The objective of this internship is to understand how the electrical conductivity of confining surfaces controls the flow properties of a nanoconfined saline solution. To this end, the project will utilize semiconducting surfaces, which will allow for the experimental exploration of a situation that lies between insulating and conducting surfaces. The internship will consist of several complementary stages: • fabrication of surfaces by sputtering; • characterization of their topography using atomic force microscopy (AFM); • conducting dSFA experiments to measure hydrodynamic forces in confined solutions; • analysis and modeling of the results to identify the role of surface conductivity. All necessary experimental techniques are available and mastered in the laboratory. The internship will thus allow the candidate to gain training in a range of cutting-edge experimental techniques at the interface between fluid mechanics, condensed matter physics, and interface physics. This project is part of a research theme currently being developed at the laboratory and may be continued as a doctoral thesis, funded under the ANR JCJC ElectroMecano project. Continuing the project will, in particular, allow us to take a deeper look with the combination of mechanical and electrical measurements within the dSFA, in order to develop a unified understanding of fluid, ionic, and electronic transport under confinement.