Directly forming ferroelectric thin films on metal surfaces by simulating erosion

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630128
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electronic materials/Electric materials
• Research Institution: Saga University
• Principal Investigator: ZHENG Xu-Guang 佐賀大学, 工学(系)研究科(研究院), 教授 (40236063)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 水酸塩化物 / 薄膜形成 / 強誘電体 / 腐食

Outline of Final Research Achievements

Hydroxyl salts of the type M2(OH)3X (X = Cl, Br, or I) have been known for a long time. The most familiar might be the hydroxyl chloride Cu2(OH)3Cl (atacamite), which forms naturally on copper and bronze as a green patina and is widely recognized as imparting the characteristic hue to the Statue of Liberty. It may also exist as bio-minerals in living organisms such as in the jaws of the marine bloodworm and crocodile. Recently, we found ferroelectricity in some hydroxyl salts. On these backgrounds, by simulating the natural erosion, this research aimed at directly forming ferroelectric thin films of hydroxyl salts on metal surfaces, which can be developed into an easily-applicable technology for bio-friendly electronics.
Through investigating the erosion behaviors of metals in various acid environmental conditions, we have succeeded in directly forming thin films of hydroxyl salts on metal surfaces by erosion. Further development can be expected.

Free Research Field

物性物理学