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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster 2

CPP 17.12: Poster

Dienstag, 6. September 2022, 11:00–13:00, P2

Following the directed self-assembly of crystallizable block co oligomers via in situ AFM — •Alexander Meinhardt and Thomas F. Keller — Centre for X-ray and Nano Science (CXNS), Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

Bottom up nanofabrication utilizing the molecular self-assembly of block co-oligomers with sub-10 nm domain sizes are widely discussed as a promising route for next generation photolithography. Double crystalline co-oligomers can be used to create well defined, high-fidelity nanostructures by controlling the competing driving forces microphase separation and crystallization. We report on the surface nanostructure formation and its temporal evolution during annealing of thin films of an amphiphilic double crystalline polyethylene-block-poly(ethylene oxide) co-oligomer (PE-b-PEO) on planar and patterned surfaces. Directing the self-assembly of such systems with physical or chemical guiding patterns can enable the formation of defined, large scale amphiphilic nanostructures, which could be of interest for various applications, e.g., biomaterials, photonics, and nanotechnology. However, there still remain several challenges regarding the characterization, defect density, pattern fidelity, and post processing of such block copolymer nanopatterns. By investigating the directed self-assembly (DSA) of the PE-b-PEO using AFM in situ, we aim to tune the balance of the involved driving forces and in turn create optimized nano-templates.