Development of Monodisperse Block Polymers for High Precision and High Resolution Nanofabrication

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02792
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35020:Polymer materials-related
• Research Institution: Hokkaido University
• Principal Investigator: Isono Takuya 北海道大学, 工学研究院, 准教授 (70740075)
• Co-Investigator(Kenkyū-buntansha): 佐藤 敏文 北海道大学, 工学研究院, 教授 (80291235)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 単分散ポリマー / ブロック共重合体 / ミクロ相分離 / 自己組織化

Outline of Final Research Achievements

Microphase-separated structure formed by block copolymers (BCPs) is promising as a template for constructing nanostructures, and the application in nanofabrication with single-nanometer resolution is highly expected. To achieve precise nanofabrication in such ultrasmall size region, conventional polydisperse BCPs are no longer sufficient, and monodisperse BCPs will become the mainstream in the future. In this study, we aimed to establish molecular design guidelines of monodisperse BCPs for constructing asymmetric lamellar structures and network structures required for engineering applications. We focused on BCPs based on monodisperse oligosaccharides and carried out systematic synthesis. As a result, we succeeded in obtaining asymmetric lamellar and network microphase-separated structures (DG, Fddd, and HPL).

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

今回の研究では、単分散糖鎖ブロック共重合体の系統的な合成とナノ構造解析によって非対称ラメラ構造をはじめ、ダブルジャイロイド、さらには通常のブロック共重合体では報告例が極めて限られるFdddや六方穴あきラメラ構造といったネットワーク状ミクロ相分離構造を10 nm以下の微細領域で得ることに成功した。これらの知見は単分散ブロック共重合体における分子構造とミクロ相分離挙動の関係を理解するための礎となるだけでなく、将来的に、数nmレベルの超高解像度なナノ加工技術の進展に大きく貢献するものと期待される。