Advanced Functional Materials · 2003 · 174 citations · 17 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryPolymer ChemistryThin FilmsNanoporous MaterialsNanostructured SurfacesPolymer PhysicsPolymer SurfacesPolymer Thin FilmsSurface ModificationBlock Copolymer MorphologyBlock Copolymer Self-assemblyBlock Copolymer Thin FilmsChemical ModificationChemical Surface ModificationNanoporous SurfacesNanostructured Polymer FilmsReversible Chemical Reactions
Abstract Thin films of block copolymers have been used as templates and scaffolds for the fabrication of arrays of nanostructured materials. In general, a chemical modification of the film or the removal of one of the components by photodegradative methods is required to produce a nanoporous film that serves as a template or scaffold. Here, however, the preferential interaction of one of the components with a solvent is shown to produce a reconstruction of the block copolymer film that, upon drying, leads to the generation of a nanoporous template. The area density of the pores is identical to that of the original copolymer thin film. Since no chemical reactions occurr, the process is fully reversible. Upon heating the copolymer film above its glass‐transition temperature, mobility is imparted to the copolymer and the original copolymer film with oriented domains is recovered. The film reconstruction significantly simplifies the generation of nanoporous templates.
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Controlling Polymer-Surface Interactions with Random Copolymer Brushes
P. Mansky, Y. Liu, E. Huang et al. · Science · 1997 · 1.3K citations