Dresden 2026 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster II

CPP 46.28: Poster

Thursday, March 12, 2026, 09:30–11:30, P5

PEDOT Molecular Imprinting in PEDOT:PSS/PDADMA Layer-by-Layer Films — •Martin Hunger, Muhammad Khurram, and Christiane A. Helm — martin.hunger@uni-greifswald.de

PPEDOT:PSS films are widely used because they offer high conductivity & tunable electro-optical properties. We prepare PEDOT:PSS films with a thickness of up to 150 nm using Layer-by-Layer assembly. We vary the preparation conditions: flow cell, dip coating, PEDOT:PSS concentration in solution, and rinsing steps. Whenever PDADMA is the top layer, UV-vis-IR absorption spectroscopy shows that there is significantly less PEDOT in the films than when PEDOT:PSS is the top layer. Films prepared using the flow cell have the highest electrical conductivity (approx. 200 kS/m) with PEDOT:PSS. When PEDOT is the top layer, conductivity is reduced by a factor of 100. The conductivity of films prepared with dip coating with PEDOT:PSS as the top layer is one order of magnitude lower or more. When PDADMA is the top layer, conductivity drops by an additional 4 to 5 orders of magnitude. Thus, during assembly, PEDOT can be selectively removed and subsequently rebound to the film, leaving behind well-defined molecular cavities that preserve their shape and enable reconstruction of percolative pathways.

Keywords: PEDOT:PSS; Conductive coating; Percolative pathways; Layer-by-Layer coating; Molecular Imprinting