Nanotubes from 6-arm star-shaped (PMMA-b-PS)<sub>6</sub> thin films
ORAL
Abstract
Fabrication of nanotube arrays has attracted much attention because of potential applications such as photo catalytics and sensors. Although nanotubes have been formed from core-shell cylindrical morphology in a triblock terpolymer, an appropriate solvent annealing should be done.
Here, we obtained nanotube array by changing the chain architecture of block copolymers from linear to star shape. We synthesized 6-arm star-shaped poly(methyl metacrylate)-block-polystyrene copolymer [(PMMA-b-PS)6] having a fixed volume fraction of PMMA with 0.50. When the film thickness was n L0 (n is integer and L0 is the lamellar domain spacing), nanotube arrays were obtained after thermal annealing. We also investigated the surface reconstruction depending on film thickness, annealing time, and substrate.
Here, we obtained nanotube array by changing the chain architecture of block copolymers from linear to star shape. We synthesized 6-arm star-shaped poly(methyl metacrylate)-block-polystyrene copolymer [(PMMA-b-PS)6] having a fixed volume fraction of PMMA with 0.50. When the film thickness was n L0 (n is integer and L0 is the lamellar domain spacing), nanotube arrays were obtained after thermal annealing. We also investigated the surface reconstruction depending on film thickness, annealing time, and substrate.
*This work was supported by the National Creative Research Initiative Program, the National Research Foundation of Korea (2013R1A3A2042196)
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Presenters
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So Yeong Park
- Department of Chemical Engineering, Pohang Univ of Sci & Tech