Continuous hydrothermal synthesis of nickel oxide nanoplates and their use as nanoinks forp-type channel material in a bottom-gate field-effect transistor

Abstract

Nickel oxide nanoplates were continuously synthesized by hydrothermalreaction using a flow-type reactor. The products had a thickness of ∼ 10 nm and a lateral size of 100–500 nm. The nanoplates were purified and drop-cast on a bottom-gatesubstrate and used as the channel material in a field-effect transistor after annealing at300 °C. TheId–Vd profile showed that the NiO nanoplates worked as the p-type semiconductor. This resultsuggests that various electronic devices can be prepared using metal oxide nanomaterials,which exhibit various properties including magnetism, ferroelectronics and catalysis as wellas stability and safety in air and water.