Preparing non-volatile resistive switching memories by tuning the content of Au@air@TiO₂-h yolk–shell microspheres in a poly(3-hexylthiophene) layer

Abstract

Crystalline hybrid microspheres, encapsulating a Au nanocore in the hollow cavity of a hairy semiconductor TiO2 shell (Au@air@TiO2-h microspheres) were prepared using template-assisted synthesis methods. The as-prepared microspheres are dispersed into a poly(3-hexylthiophene) (P3HT) matrix and used as a memory active layer. The electrical rewritable memory effects of Al/[Au@air@TiO2-h + P3HT]/ITO sandwich devices can be effectively and exactly controlled by tuning the microsphere content in the electroactive layer. To clarify the switching mechanism, different components in the device, such as P3HT and the microspheres, have been investigated. And it was determined that the switching mechanism can be attributed to the formation and rupture of oxygen vacancy filaments. These results suggest that the Au@air@TiO2-h microspheres are potentially capable of high density data storage. In addition, this finding could provide important guidelines for the reproducibility of nanocomposite-based memory devices and is helpful to demonstrate the switching mechanism of these devices.

Resistance Controllability in Alkynylgold(III) Complex‐Based Resistive Memory for Flash‐Type Storage Applications

“…Devices with a compliance current of I cc =10 −2 A show a typical binary characteristic (Figure S8 in the Supporting Information). According to a previous report, the formation of conductive filaments is difficult when a top gold electrode is used. Thus, conductive filaments may be a key factor in the ternary process of the Al/ 1 /ITO device at a compliance current of I cc =10 −2 A.…”

A Simple and Scalable Route to Synthesize CoxCu1−xCo2O4@CoyCu1−yCo2O4 Yolk–Shell Microspheres, A High‐Performance Catalyst to Hydrolyze Ammonia Borane for Hydrogen Production

“…In the field of heterogeneous catalysis, the superior performance of the catalysts with yolk–shell structures is believed to be highly associated with the freely movable core catalysts, and the hollow space between the core and shell, which provides a good environment for the catalytic reaction . Various methods have been developed to prepare yolk–shell structured materials, including selective etching or dissolution, Ostwald ripening, the ship‐in‐bottle method, soft template assembly, galvanic replacement and the Kirkendall diffusion . However, many steps are involved in most of these methods, which make them time‐consuming, tedious, and/or costly.…”

High On/Off Ratio Organic Resistive Switching Memory Based on Carbazolyl Dicyanobenzene and a Polymer Composite

“…As a representative example, P3HT has distinguished itself as the donor component of organic solar cell and the polymer component of ORSM with advantages of high mobility, good chemical stability, and low cost. − A variety of hybrid systems based on inorganic small materials and P3HT have been reported to obtain ORSM, such as metal nanoparticles, carbon nanotubes, and graphene oxide . However, seldom research focuses on the organic small molecules.…”