SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 12: Scanning Probe Techniques: Method Development I
O 12.3: Talk
Monday, March 27, 2023, 15:30–15:45, GER 37
Modification of Fluid-FM Cantilevers for Studying Local Electrochemistry at Solid | Liquid Interfaces — •Matin Karimnia1 and Timo Jacob1,2,3 — 1Institute of Electrochemistry, Ulm University, Ulm, Germany — 2Helmholtz-Institute-Ulm (HIU), Ulm, Germany — 3Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Local electrochemical measurements at the solid | liquid interface are of particular interest to gain deeper insights into the structure-activity relationship for electrochemical systems. Atomic force microscopy (AFM), can be effectively used for in situ monitoring of electrochemical processes, including adsorption, and metal deposition1−4. For a better resolution of local phenomena, in this work, we present the use of Fluid-FM. Here the cantilever has a hollow microfluidic channel, allowing for probing electrochemical processes in the vicinity of the tip. This can be achieved by modifying the Fluid-FM cantilever to serve as a counter electrode in the electrochemical cell formed by the tip and the investigated substrate. The feasibility of the approach is demonstrated using a Au surface in contact with a diluted H2SO4 electrolyte. The influence of parameters such as the ratio between the surface area of the working electrode and counter electrode, as well as the volume of the electrolyte on the electrochemical performance is discussed.
[1] Seo, Yongho, et al. Rep.Prog.Phys. 71 (2007): 016101. [2] Oorschot, Ralph, et al. Techn. Instrum. 2 (2015): 1-11. [3] Zampardi, Giorgia, et al. RSC Adv. 5 (2015): 31166-31171. [4] Ossola, Dario, et al. Phys. Rev. Let. 115 (2015): 238103.