Controlling morphological transition of metal infiltrated cylinder-forming block copolymer thin films
발표자
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초록
내용
Block copolymer (BCP) self-assembly has gained vast interest as a promising nanopatterning platform. For future applications of BCP nanopatterning, it is crucial to fabricate nanostructures beyond the conventional morphologies BCPs exhibit. To expand the accessible range of nanopatterns, BCPs can be blended and end-functionalized. In this study, we further expand the nanopattern library of cylinder-forming BCPs by selective metal anion infiltration. Shear-aligned BCP cylinders are immersed in anionic metal complex solutions, followed by thermal annealing to result in unique morphologies. Scanning electron microscopy (SEM) and the detailed image analysis show that the morphology transition is determined by the structural characteristics (e.g., defects) of the initial sheared film. Furthermore, the mechanism of the transition is revealed by tuning parameters such as annealing temperature and time. This approach offers a cost-effective experimental platform for fabricating unconventional BCP nanopatterns.