Creation of bistable molecular junction with electrical ON/OFF switching mechanisum

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K21184
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 33:Organic chemistry and related fields
• Research Institution: Hokkaido University
• Principal Investigator: Takanori Suzuki 北海道大学, 理学研究院, 教授 (70202132)
• Project Period (FY): 2020-07-30 – 2023-03-31
• Keywords: 分子デバイス / 酸化還元系 / 動的酸化還元 / 電気化学的双安定性

Outline of Final Research Achievements

Molecular thin film attached with electrodes are called molecular junction. As part of research aimed at clarifying the factors that influence the characteristics of switchable molecular junctions with ON/OFF functions, and aiming at epoch-making devices using them, we developed materials for molecular thin films under the novel molecular design concept. In particular, by synthesizing substances in which the OFF state and the ON state can coexist in the same molecule, we demonstrated the electrochemical bistability in the dynamic redox system. In addition the mechanism for the interconversion between the OFF and ON state was clarified through spectral observations of intermediate state.

Free Research Field

有機化学

Academic Significance and Societal Importance of the Research Achievements

分子薄膜の両面に電極が接合された分子ジャンクションは、エレクトロニクスの高速化とダウンサイジングに不可欠な将来的技術であり、ON/OFF機能を付与し、更にその特性を左右する電極接合の方法ならびに分子薄膜を形成する材料開発の両面での研究を推進することで、画期的なデバイスデザインにより新たなパラダイムを拓き、近未来での持続可能な社会へ貢献できる新技術を確立することが可能となる。