Creation of brain-like information devices by self-assembled redox molecular networks

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360011
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Osaka University
• Principal Investigator: MATSUMOTO Takuya 大阪大学, 理学(系)研究科(研究院), 教授 (50229556)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 酸化還元 / ニュートラルネットワーク / 自己組織化 / 確率共鳴 / 脳型デバイス / 分子ネットワーク / クーロンブロッケード / 分子エレクトロニクス

Outline of Final Research Achievements

The elemental molecular functions for molecular network system exhibiting brain-like information processing have been explored in this project. We focused on self-doped polyaniline that is expected as a molecular conductive wire in nanoscale. We found that the self-doped polyaniline has free electron intra molecule and shows ohmic conductance at low temperature (10 K). We also focused on polyoxometalates that is expected as a memory due to their multiple redox states. We revealed that the polyoxometalates has finite conductance at low temperature (10 K) and extremely low charging energy (0.03 meV). Furthermore, we examined the single molecular electric conductance of metaloproteins. From this study, we demonstrated the requirements for low bias threshold property in current-voltage curves; weak coupling between electrode and molecular orbital, presence of potential well with floating condition under external electric field, and the distance between two electrode longer than 3 nm.

Free Research Field

化学