Memristive properties of hexagonal WO3 nanowires induced by oxygen vacancy migration
Open Access
- 24 January 2013
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nanoscale Research Letters
- Vol. 8 (1), 50
- https://doi.org/10.1186/1556-276x-8-50
Abstract
Tungsten trioxide (WO3) is always oxygen-deficient or non-stoichiometric under atmospheric conditions. Positively charged oxygen vacancies prefer to drift as well as electrons when the electric field is strong enough, which will alter the distribution of oxygen vacancies and then endow WO3 with memristive properties. In Au/WO3 nanowire/Au sandwich structures with two ohmic contacts, the axial distribution of oxygen vacancies and then the electrical transport properties can be more easily modulated by bias voltage. The threshold electric field for oxygen vacancy drifting in single-crystal hexagonal WO3 nanowire is about 106 V/m, one order of magnitude less than that in its granular film. At elevated temperatures, the oxygen vacancy drifts and then the memristive effect can be enhanced remarkably. When the two metallic contacts are asymmetric, the WO3 nanowire devices even demonstrate good rectifying characteristic at elevated temperatures. Based on the drift of oxygen vacancies, nanoelectronic devices such as memristor, rectifier, and two-terminal resistive random access memory can be fabricated on individual WO3 nanowires.Keywords
This publication has 27 references indexed in Scilit:
- On-Demand Nanodevice with Electrical and Neuromorphic Multifunction Realized by Local Ion MigrationACS Nano, 2012
- Resistive non-volatile memory devices (Invited Paper)Microelectronic Engineering, 2009
- Evidence of Localized Water Molecules and Their Role in the Gasochromic Effect of WO3 Nanowire FilmsThe Journal of Physical Chemistry C, 2009
- Memristive switching mechanism for metal/oxide/metal nanodevicesNature Nanotechnology, 2008
- The missing memristor foundNature, 2008
- Anode-interface localized filamentary mechanism in resistive switching of TiO2 thin filmsApplied Physics Letters, 2007
- Nonvolatile Memory Elements Based on Organic MaterialsAdvanced Materials, 2007
- Gasochromic effect and relative mechanism of WO3nanowire filmsNanotechnology, 2007
- Nanoscale Memory Elements Based on Solid-State ElectrolytesIEEE Transactions on Nanotechnology, 2005
- Hysteresis Caused by Water Molecules in Carbon Nanotube Field-Effect TransistorsNano Letters, 2003