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Nanoparticle-Induced Self-Assembly of Block Copolymers into Nanoporous Films at the Air-Water Interface
- Nanoparticle-Induced Self-Assembly of Block Copolymers into Nanoporous Films at the Air-Water Interface
- Kang, Seulki; Ryu, Du Yeol; Ringe, Emilie; Hickey, Robert J.; Park, So-Jung
- Ewha Authors
- SCOPUS Author ID
- Issue Date
- Journal Title
- ACS NANO
- ACS NANO vol. 14, no. 9, pp. 12203 - 12209
- self-assembly; nanoparticle; block copolymer; interface; porous; breath figure
- AMER CHEMICAL SOC
- SCIE; SCOPUS
- Document Type
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- Herein, we report the cooperative self-assembly of nanoparticles and block copolymers at the air-water interface, which can generate highly uniform and readily transferable composite films with tunable nanoscale architecture and functionalities. Interestingly, the incorporation of nanoparticles significantly affects the self-assembly of block copolymers at the interface. The nanoparticle-induced morphology change occurs through distinct mechanisms depending on the volume fraction of the hydrophobic block. For block copolymers with a relatively small hydrophobic volume fraction, the morphology transition occurs through the nanoparticle-induced swelling of a selective block. When the hydrophobic volume fraction is large enough, added nanoparticles promote the breath figure assembly, which generates uniform honeycomb-like porous structures with unusual nanoscale periodicity. This approach is generally applicable to various types of nanoparticles, constituting a simple one-step method to porous thin films with various functionalities.
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