Jump to main content
Jump to site search


Probing electrochemically induced resistive switching of TiO2 by SPM techniques

Abstract

Resistive switching at the nanoscale is an emerging research field and Scanning Probe Microscopy (SPM) is a powerful tool for studies in this area. Under the SPM tip, the electrical field is very high due to the small tip radius on the order of tens of nanometers, and this can enable a range of ionic/electrochemical phenomena during the resistive switching of the materials under SPM tip. Although the ionic/electrochemical phenomena have long been considered vital for the resistive switching of materials, few experimental evidence, as well as the decoupling of the effects of the electrochemical processes at different stages, are still needed. In this work, we applied SPM based techniques to study the resistive switching as well as the electrochemical phenomena during the resistive switching of the TiO2 thin film prepared by Pulse Laser Deposition (PLD). It is found that the reversible or irreversible electrochemical processes initiated at different voltages can promote or degrade the resistive switching behavior of the TiO2. Combined with an electrical cell with the environmental control, these electrochemical processes have evidenced to require the involvement of moisture; the accumulation of oxygen vacancies, proton, and hydroxyl at the tip/TiO2 junction may contribute to the promoting effect of reversible electrochemical process on resistive switching, while the oxygen vacancy ordering and the injection of proton and hydroxyl into the lattice may lead to the irreversible electrochemical process. This work has provided a detailed insight into the characteristics, origins, and the effects of the electrochemical phenomena on resistive switching performance, and will provide a further understanding of the electrochemical phenomena in the various functional material.

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Oct 2017, accepted on 07 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP06992H
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
  •   Request permissions

    Probing electrochemically induced resistive switching of TiO2 by SPM techniques

    W. Lu, L. M. Wong, S. Wang and K. Zeng, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP06992H

Search articles by author

Spotlight

Advertisements