Molecular scale understanding of dissolution/precipitation processes of organic crystal to ionic liquid

2016 Fiscal Year Final Research Report

• Project/Area Number: 26620008
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Osaka University
• Principal Investigator: Fukui Ken-ichi 大阪大学, 基礎工学研究科, 教授 (60262143)
• Co-Investigator(Renkei-kenkyūsha): TAKEYA Junichi 東京大学, 新領域創成科学研究科, 教授 (20371289)
• Research Collaborator: MIYAMOTO Hiroo ; BANDO Ken-ichi ; CHUJO Fumiya ; MORINO Yusuke
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: イオン液体 / 溶解・析出プロセス / 有機半導体 / 界面制御 / 電界効果トランジスタ

Outline of Final Research Achievements

By using frequency modulation AFM technique in ionic liquid, we have achieved a highly precise patterning of organic semiconductor at one molecular depth resolution and at a few nm lateral resolution in any desired shape.
Novel phenomena what we found for the electric double layer field effect transistor using rubrene single crystal with an ionic liquid was the spontaneous increase of the hole mobility at the interface by spontaneous formation of an ideally flat interface by dissolution of rubrene molecules into the ionic liquid, which is restricted only at the heterogeneous sites.

Free Research Field

表面物理化学