Anodic HfO2 crossbar arrays for hydroxide-based memristive sensing in liquids

Original scientific paper


  • Ivana Zrinski Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Austria
  • Dominik Knapic Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Austria
  • Achim Walter Hassel Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Austria
  • Andrei Ionut Mardare Institute of Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Austria



Memristors, anodic oxides, ultra-thin films, liquid detection, valve metals
Graphical Abstract


The development of miniaturized and portable sensing devices is crucial to meeting the high processing capacity demands of contemporary computing systems. Hence, the conceptualization of memristive sensors for hydroxide-containing liquids is proposed in this study. Metal-insulator-metal (MIM) structures were formed on electrochemically anodized Hf thin films with Pt patterned as top electrodes. These MIM memristive structures were integrated into a crossbar array, allowing the investigation of a high number of potential memristor sensors. The MIM structures have demonstrated sensing possibilities in the detection of the hydroxyl ion in D-glucose, used as a standard solution. The sensing method was based on the resistive state ratio extracted from I-U sweeps measurements. Analytical characterization of the memristor sensor was done based on the resistive state ratio in relation to different concentrations of a standard solution drop cast directly on the surface of the device. Linearity was found for D-glucose concentrations ranging from 10 mM to 80 mM with a reasonable corresponding correlation factor (R2=0.96809). Additionally, D-glucose incorporation in anodic oxide was studied by XPS to investigate its effect on conductive filaments formation. A carbon bonded by a single covalent bond to oxygen (O-C-O) was detected, confirming the proposed sensing mechanism defined by the glucose penetrating the oxide/electrode interface.


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10-04-2023 — Updated on 10-04-2023

How to Cite

Zrinski, I., Knapic, D., Hassel, A. W., & Mardare, A. I. (2023). Anodic HfO2 crossbar arrays for hydroxide-based memristive sensing in liquids: Original scientific paper. Journal of Electrochemical Science and Engineering, 13(5), 805–815.



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