Regensburg 2025 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 44: 2D Materials

CPP 44.1: Talk

Friday, March 21, 2025, 11:30–11:45, H34

Sensors based on graphene field-effect transistors functionalized with molecularly imprinted polymers — •David Kaiser¹, Hamid Rasouli¹, Michael Ringleb^2,3, Ludwig Büttner², Martin Hager^2,4, Guobin Jia⁵, Jonathan Plentz⁵, Christian Beringer⁴, Patrick Bräutigam⁴, Uwe Hübner⁵, Patrick Endres², Christof Neumann¹, Steffi Stumpf^2,3, Benjamin Dietzek-Ivanšić^1,4,5, Ulrich S. Schubert^2,3,4 und Andrey Turchanin^1,3,4 — ¹Institute of Physical Chemistry, Friedrich Schiller University Jena — ²Laboratory of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena — ³Jena Center for Soft Matter, Friedrich Schiller University Jena — ⁴Center for Energy and Environmental Chemistry Jena, Friedrich Schiller University Jena — ⁵Leibniz Institute of Photonic Technology (Leibniz IPHT)

Monitoring of micropollutants has become a regulatory requirement due to their environmental and health impacts. However, their on-site detection remains challenging, as current methods require transporting samples to centralized laboratories. Here, we present a method for the direct identification of the pharmaceutical carbamazepine (CBZ) utilizing solution-gated graphene field-effect transistors (SG-GFETs) that is appropriate for on-site use. We integrate molecularly imprinted nanoparticles (MIPs) with a diameter of 20 nm onto graphene via their self-assembly, creating highly stable films that specifically bind CBZ, and demonstrate a detection sensitivity reaching as low as 1 pM in buffer solutions and 10 pM in samples of environmental water.

Keywords: solution-gated graphene field-effect transistors; molecularly imprinted polymers; functionalization; van der Waals heterostructures; chemical sensors