An organic–metal–inorganic three-component nanojunction array: design, construction and its reversible diode-like resistive electrical switching behavior

Abstract

A reversible diode-like resistive electrical switching composite material, an AgTCNQF₄–AgNPs–TiO₂ organic–metal–inorganic hetero-nanojunction array, has been successfully prepared on a fluorine-doped tin oxide (FTO) glass slide. These AgTCNQF₄–AgNPs–TiO₂ nanojunctions show obvious absorption bands in the visible to near-infrared region, which are attributed to interfacial charge transfer from TiO₂ to AgTCNQF₄. Moreover, the local electrical properties of these AgTCNQF₄–AgNPs–TiO₂ nanojunctions have been tested in a device configuration of Au-tip/AgTCNQF₄–AgNPs–TiO₂/FTO and the measured results reveal that these AgTCNQF₄–AgNPs–TiO₂ nanojunctions possess many applicable functions involving the switchable diode effect, reversible electrical switching and memory behavior.