고분자 및 소프트 나노소재 연구실

For example, diblock copolymers spontaneously form nanometer-sized micelles in a selective solvent for one of the blocks. These micelles can be coated on solid substrates to form a self-assembled nanostructure, which can serve as a nanostructured template to direct the synthesis of an ultrahigh density array of magnetic nanoparticles. The basis of our research is investigation of the relationship between molecular and supramolecular structures and their physical properties. The followings are selected topics in our central interests. Block copolymers composed of different covalently bonded polymer chains can spontaneously form a variety of periodic nanometer-sized morphologies such as spherical, cylindrical, and lamellar structures by microphase separation. These nanostructures depend on the molecular weight, the relative volume fraction, and the Flory-Huggins interaction parameter of copolymers. Block copolymers can be spin-coated onto a substrate, followed by thermal or solvent vapor annealing to form nanostructured thin films, which hold a great promise for controlled nanopatterning of diverse materials in large area. For unconfined films of symmetric diblock copolymers on substrates, the relative interfacial energies between each block and the substrate, and the relative surface energy of each block induce a preferential wetting of one block at an interface. To control interactions between block copolymers and substrates is to employ self-assembled monolayers (SAMs) of alkylsiloxanes on SiO2. Nanostructures of block copolymers have been intensively used as etching masks and templates, which are created by selectively removing one of the blocks. They were directly utilized as a template for various metal oxide nanostructures produced by the hydrothermal growth and so