Dresden 2026 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Charged Soft Matter, Polyelectrolytes and Ionic Liquids

CPP 13.7: Talk

Monday, March 9, 2026, 16:45–17:00, ZEU/0260

Unconventional Layer-by-Layer Assembly of Films with PEDOT: Write, Read, and Delete — •Muhammad Khurram, Martin Hunger, and Christiane A. Helm — muhammad.khurram@uni-greifswald.de

PEDOT:PSS films are widely used because they offer high conductivity & tunable electro-optical properties. We present an unconventional layer-by-layer (U-LbL) method for PEDOT:PSS/PDADMA multilayers. Masking was used to create either homogeneous coatings or narrow conductive strips. Each bilayer is only 7-9 nm thick, indicating that films form by adsorption of PSS-linked PEDOT, with unbound nanoparticles removed during rinsing. Flow-cell produces higher conductive films (260 kS/m) than dip coating. The U-LbL process also provides a natural framework for repeated Write/Read/Delete modulation, including PEDOT addition, partial & controlled PEDOT removal, forming molecular cavities that rebind PEDOT & restore percolative pathways.

Keywords: PEDOT:PSS; Conductive coating; Polyelectrolyte multilayer; Unconventional Layer-by-Layer coating; Flow cell coating