Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 23, Pages 6341-6346Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm1021678
Keywords
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Funding
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics
- MEXT, Japan
- Japan Science and Technology Agency (JST)
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The current work develops a solution-based self-assembling route to construct close-packed nanofilms (thickness approximate to 30 nm) using monodisperse hexagonal platelets of Co(OH)(2) as two-dimensional building blocks. The hydroxide film was postannealed and could be transformed into [111]-oriented cobalt monoxide (CoO) in a topotactic fashion retaining the original hexagonal platelet shape. Electrical resistive switching property of as-transformed CoO film was investigated, revealing a gigantic change in electrical resistance (ON/OFF current ratio: 10(3)) and fast switching speed (ns level). This solution-based self-assembly procedure, in combination with a topotactic conversion from lamellar hydroxides to corresponding oxides, offers a new alternative to high-performance thin film devices based on transition metal oxide.
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