Titanium dioxide (TiO 2 ) is one of the most widely used materials in resistive switching applications, including random-access memory, neuromorphic computing, biohybrid interfaces, and sensors. Most of these applications are still at an early stage of development and have technological challenges and a lack of fundamental comprehension. Furthermore, the functional memristive properties of TiO 2 thin films are heavily dependent on their processing methods, including the synthesis, fabrication, and post-fabrication treatment. Here, we outline and summarize the key milestone achievements, recent advances, and challenges related to the synthesis, technology, and applications of memristive TiO 2 . Following a brief introduction, we provide an overview of the major areas of application of TiO 2 -based memristive devices and discuss their synthesis, fabrication, and post-fabrication processing, as well as their functional properties.

A planar memristor was fabricated by a hybrid method combining AFM patterning and inkjet printing.

Magnetite (Fe3O4) nanoparticles have found numerous applications due to ease of fabrication, favourable combination of physical and chemical properties, as well as environmental and biological safety. At the same time,...

Correction for ‘Inkjet assisted fabrication of planar biocompatible memristors’ by Georgii A. Illarionov et al., RSC Adv., 2019, 9, 35998–36004.

Application of sol-gel derived titania nanoparticles in memristive thin film devices has been a subject of several studies. The reported data on the functional properties and stability of such devices scatter considerably. Meanwhile, the role of post-fabrication treatment, such as annealing in reducing atmosphere, is still poorly investigated for this class of devices. In this study, the effects of thermal annealing in a reducing atmosphere on the resistive switching behavior and the morphological changes of the top electrode during the electroforming process have been systematically addressed for the samples of Al/TiO 2 /FTO thin film memristors prepared using sol-gel derived titania. Manifestations of several phenomena affecting the functional stability of these thin films, such as electrode delamination and collapse due to formation of gas bubbles, appearance of electrochemical patterns at the electrode surface, and morphological changes induced by the electroforming process have been systematically established in relation with the various conditions of thermal treatment in a reducing atmosphere.