ArticleACS materials Au2026
Revisiting Vertical Orientation in Block Copolymer Complexes through Controlled Solvent Vapor Annealing.
Article in ACS materials Au, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Block copolymers (BCPs) are macromolecules made up of two or more chemically different polymer blocks that are covalently bound together. Their mutual incompatibility causes them to separate into nanoscale microphases, which allows the blocks to self-assemble into ordered shapes, such as lamellae, spheres, and cylinders. The ability to self-assemble offers a versatile route for forming well-ordered nanoscale architectures relevant to nanolithography, membranes, and functional materials. Incorporating hydrogen-bonding small molecules to form supramolecular BCP complexes expands structural diversity by altering domain size, interfacial energies, and chain mobility. These complexes expand the range of parameters for precise control over nanoscale morphology while also providing highly ordered nanostructures that can be used as soft templates for the formation of inorganic films and porous networks. However, the added complexity raises challenges in obtaining vertically oriented nanostructures, which are crucial in nanopatterning applications. In the case of solvent vapor annealed films, the effect of swelling parameters on vertical orientation has not been thoroughly investigated. Here, we demonstrate that swelling-induced surface neutrality promotes vertical orientation in PS-
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