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Highly asymmetric lamellar nanostructures from nanoparticle-linear hybrid block copolymers

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Title: Highly asymmetric lamellar nanostructures from nanoparticle-linear hybrid block copolymers
Authors: Watanabe, Kodai Browse this author
Katsuhara, Satoshi Browse this author
Mamiya, Hiroaki Browse this author
Kawamura, Yukihiko Browse this author
Yamamoto, Takuya Browse this author →KAKEN DB
Tajima, Kenji Browse this author
Isono, Takuya Browse this author
Satoh, Toshifumi Browse this author →KAKEN DB
Keywords: A-LAM
Issue Date: 21-Aug-2020
Publisher: Royal Society of Chemistry
Journal Title: Nanoscale
Volume: 12
Issue: 31
Start Page: 16526
End Page: 16534
Publisher DOI: 10.1039/d0nr05209d
Abstract: The highly asymmetric lamellar (A-LAM) nanostructure is one of the most important template geometries for block copolymer (BCP) lithography. However, A-LAM is unattainable from conventional BCPs, and there is no general molecular design strategy for A-LAM-forming BCP. Herein, a nanoparticle-linear hybrid BCP system is reported, which is designed based on the intramolecular crosslinking technique, as a remarkably effective platform to obtain the A-LAM morphology. The hybrid BCPs consisting of polystyrene single-chain nanoparticles and linear polylactide segments show a remarkable capability to form the A-LAM morphology in bulk, where a maximum width ratio of 4.1 between the two domains is obtained. This unusual phase behavior is attributed to the bulky and rigid characteristics of the nanoparticle block. Furthermore, the thin films of these hybrid BCPs show perpendicularly oriented A-LAM morphology on a chemically modified Si substrate, allowing promising application in the fabrication of asymmetric line-and-space nanopatterns.
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: 磯野 拓也

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