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Metallopolymer-block-oligosaccharide for sub-10 nm microphase separation

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Title: Metallopolymer-block-oligosaccharide for sub-10 nm microphase separation
Authors: Katsuhara, Satoshi Browse this author
Mamiya, Hiroaki Browse this author
Yamamoto, Takuya Browse this author
Tajima, Kenji Browse this author
Isono, Takuya Browse this author
Satoh, Toshifumi Browse this author →KAKEN DB
Issue Date: 7-May-2020
Publisher: Royal Society of Chemistry
Journal Title: Polymer chemistry
Volume: 11
Issue: 17
Start Page: 2995
End Page: 3002
Publisher DOI: 10.1039/d0py00271b
Abstract: High-chi (where chi is the Flory-Huggins interaction parameter) block copolymers (BCPs) have great potential to achieve ultra-small microphase-separated structures with domain spacings (d) of <10 nm, which in turn are promising for nanofabrication applications. However, when considering their practical application in next generation lithographic processes, sufficient heat resistance and high etching selectivity are also required to attain high-chi BCPs for precise pattern transfer to the substrate. Herein, we report novel high-chi BCPs comprising poly(vinyl ferrocene) (PVFc) and an oligosaccharide (maltotriose and maltohexaose), which simultaneously accomplish small d values, sufficient thermal stability, and high etching selectivity. These novel BCPs, which displayed different architectures and saccharide volume fractions, were synthesized by combining living anionic polymerization and the "click" reaction. Small angle X-ray scattering measurements revealed that PVFc-b-maltohexaose and PVFc-b-(maltotriose)(2) formed hexagonal cylinder morphology with d values of similar to 8 nm. Furthermore, a lamellar morphology with d values of 9.3 nm was realized by mixing PVFc-b-(maltotriose)(2) and glucose. The thermal properties and etching resistance of PVFc and the oligosaccharides were also investigated. As expected, PVFc displayed a high thermal stability (PVFc: T-g, similar to 140 degrees C and decomposition temperature, similar to 350 degrees C) and higher etching resistance than the oligosaccharides.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 敏文

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