Dresden 2017 – wissenschaftliches Programm
CPP 48.13: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P2-OG1
Generating network structures with long-range order in triblock terpolymer films by controlled solvent vapor annealing — •Karolina Korzeb1, James A. Dolan2, Ullrich Steiner1, and Ilja Gunkel1 — 1Adolphe Merkle Institute, Fribourg, Switzerland — 2University of Cambridge, Cambridge, United Kingdom
Triblock terpolymers are an interesting class of polymers due to their potential to self-assemble into a variety of continuous network structures. Amongst these network structures the gyroid is of particular interest. Due to its unique geometry, a gyroid-structured plasmonic material exhibits interesting optical properties, e.g. linear dichroism. While triblock terpolymers were shown to serve as templates for the fabrication of a nanostructured gold gyroid, the anisotropic optical properties related to the gyroid morphology became only evident for samples showing large individual gyroid grains. However, the fabrication of polymer templates with long-range lateral order still remains a challenge. In this work, we show that continuous network structures with long-range lateral order can be generated by means of controlled solvent vapor annealing of a PI-b-PS-b-PGMA (ISG) triblock terpolymer film. In-situ GISAXS was used to identify the regime where films swollen in THF vapor exhibit well-ordered morphologies. The degree of order in these swollen films was maintained only after controlled solvent removal. In this way, grains of about 10 μm in size were produced in dry ISG films as determined by AFM Moiré patterns. These films are therefore very promising candidates for the fabrication of gyroid-structured plasmonic materials.