SUPRAFUNCTION aims at mastering principles of supramolecular chemistry, in combination with top-down nanofabrication, to achieve a full control over the architecture vs. function relation in macromolecular materials for organic electronics, by analyzing and optimizing fundamental properties through which new capacities can emerge.
Highly ordered supramolecularly engineered nanostructured materials (SENMs) will be self-assembled from conjugated 1D/2D molecules, and ultra-stiff multichromophoric arrays based on poly(isocyanides). Their interfaces with chemically functionalized top-down/bottom-up nanofabricated electrodes and with dielectrics will be tailored to reach SENM energy barriers with height <0.1eV and interface roughness of 3-7Å. Multiscale characterization of SENMs, nanoelectrodes and various interfaces will be done by Scanning Probe Microscopies, ultraviolet photoelectron spectroscopy and other methods, especially to quantitatively study 3 relevant properties, viz charge injection at interfaces, charge transfer, and photoswitching current through a molecular material. Prototypes of nanowires and Field-Effect Transistors (FETs) will be fabricated especially focusing on (1) unravelling charge transport vs. charge injection, (2) the effect of photo-doping in electron acceptor-donor dyad based SENMs, and (3) novel photo-switchable FETs based on either (i) photo-responsive azobenzene SAMs chemisorbed on electrodes/dielectrics to reversibly modulate the charge injection at interfaces, or (ii) electroactive SENMs of dithienylethenes featuring extended conjugation in the side arms to promote a light tuneable p-p stacking among adjacent molecules, ultimately affecting the charge transport in stacks.
The generated knowledge will offer new solutions to nanoscale multifunctional organic based logic applications.
Fields of science
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