Title |
Nonpolar Resistive Switching in Ag@TiO2 Core–Shell Nanowires
|
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Published in |
ACS Applied Materials & Interfaces, October 2017
|
DOI | 10.1021/acsami.7b10666 |
Pubmed ID | |
Authors |
Hugh G. Manning, Subhajit Biswas, Justin D. Holmes, John J. Boland |
Abstract |
Nonpolar resistive switching, a combination of bipolar and unipolar resistive switching, is demonstrated for the first time in a single nanowire system. Exploiting Ag@TiO2 core-shell nanowires synthesized by post-growth shell formation the switching mode is controlled by adjusting the current compliance effectively tailoring the electrical polarity response.. We demonstrate ON/OFF ratios of 10(5) and 10(7) for bipolar and unipolar modes respectively. In the bipolar regime, retention times could be controlled up to 10(3) s and in unipolar mode > 10(6) s were recorded. We show how the unique dual-mode switching behavior is enabled by the defect rich polycrystalline material structure of the TiO2 shell and the interaction between the Ag core and the Ag electrodes. These results provide a foundation for engineering nonpolar resistive switching behaviors for memory storage and neuromorphic applications in core-shell nanowire structures. |
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