journal article·2019-10-22

Memristive Electronic Synapses Made by Anodic Oxidation

Shaochuan Chen, Seyedreza Noori, Marco A. Villena, Yuanyuan Shi, Tingting Han, Ying Zuo, MariaPia Pedeferri, Dmitri Strukov, Mario Lanza, Maria Vittoria Diamanti

Chemistry of Materials· Volume 31· Issue 20
Publisher page

Abstract

Memristors have recently gained growing interest due to their potential application as electronic synapses to build artificial neural networks for artificial intelligence systems. However, modulating the conductivity of memristors in a dynamic way to emulate biological synaptic behaviors is very challenging. Here we show the first fabrication of memristive electronic synapses using a dielectric film (TiO2–x) synthesized via an electrochemical anodization method. Pt/anodic TiO2–x/Ti memristive synapses show reliable and reproducible memristive behavior and fast switching times below 90 ns. By applying ramped voltage stresses, multilevel conductance states have been achieved (using different current compliances or reset voltages), and by applying pulsed voltage stresses, the potentiation and depression rates could be accurately controlled by tuning the pulse amplitudes. The switching is governed by homogeneous charge rearrangements at the TiO2–x/Ti interface and TiO2–x thickness modulation. It is concluded that the anodic oxidation method may be a cheap and effective route to fabricate competitive electronic synapses.
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Research context

OpenAlex topics: Advanced Memory and Neural Computing · Photoreceptor and optogenetics research · Neuroscience and Neural Engineering

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano and Soft Materials, Collaborative Innovation Center of Suzhou Nanoscience & Technology, Soochow University, Suzhou 215123, China

Department of Electrical and Computer Engineering, University of California at Santa Barbara, Santa Barbara, California 93106−9560, United States

Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, Milan 20131, Italy

Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States

Andrew and Erna Viterbi Faculty of Electrical Engineering, Technion—Israel Institute of Technology, Haifa 32000, Israel

Funding

State Administration of Foreign Experts Affairs · Regione Lombardia · Collaborative Innovation Center of Suzhou Nano Science and Technology · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Fondazione Cariplo · Ministry of Finance · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University

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