Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 56: Scanning probe techniques: Method development II

O 56.7: Talk

Wednesday, March 11, 2026, 12:00–12:15, HSZ/0401

Graphene Coated Nanoprobes for Local Conductivity Measurements — •Maria Saavedra-Fredes, Valeria del Campo, and Tomas P. Corrales — Universidad Técnica Federico Santa María, Valparaíso, Chile.

Here we explored the fabrication of AFM cantilevers coated with graphene (Gr) with the aim of detecting local electrical currents. The fabrication process begins with the growth of Gr on copper foils via Chemical Vapor Deposition (CVD). Subsequently, the copper substrate is dissolved using a ferric nitrate solution and then replaced with water, leaving a Gr film floating at the water air interface. This film is transferred onto an AFM cantilever using a three-axis hydraulic micromanipulator. Raman spectroscopy and SEM confirm the presence of graphene on our Gr-coated nanoprobes This technique differs from traditional methods because the Gr is collected directly from the air water interface without the use of polymer films in the process (10.3390/cryst7090269). Then, to detect currents using conductive mode AFM (10.1002/adma.201200579) and study the conduction between our Gr-coated nanoprobe and a graphene layer deposited on silicon.

Keywords: Graphene; Atomic Force Microscopy; Nanoprobes