Inkjet‐Printed Ag/a‐TiO <sub>2</sub> /Ag Neuromorphic Nanodevice Based on Functionalized Ink
Authors
Mehonic, Adnan
Takeda, Yasunori
Tokito, Shizuo
England, Jonathan
Sporea, Radu A
Publication Date
2022-11Journal Title
Advanced Engineering Materials
ISSN
1438-1656
Publisher
Wiley
Language
en
Type
Article
This Version
AO
VoR
Metadata
Show full item recordCitation
Salonikidou, B., Mehonic, A., Takeda, Y., Tokito, S., England, J., & Sporea, R. A. (2022). Inkjet‐Printed Ag/a‐TiO
<sub>2</sub>
/Ag Neuromorphic Nanodevice Based on Functionalized Ink. Advanced Engineering Materials https://doi.org/10.1002/adem.202200439
Abstract
This study aims to contribute to the burgeoning field of brain‐inspired computing by expanding it beyond conventional fabrication methods. Herein, the obstacles toward the effective inkjet printing process are encountered and the electrical characteristics are explored, providing new insights into the reliability aspects of fully printed Ag/a‐TiO2/Ag electronic synapses. The versatility of the approach is further enhanced by the highly stable in‐house‐developed a‐TiO2 ink, exhibiting optimal shelf life of five months and repeatable jetting, producing layers with nanoscale thickness resolution. Most importantly, device electrical characterization reveals synaptic dynamics, leading to activity‐dependent conductance state retention and adaptation characteristics, implying inherent learning capabilities. The synaptic dynamics are attained by solely adjusting the duty cycle of the applied pulsed voltage trigger, while keeping amplitude and polarity fixed, a method readily compatible with realistic applications. Furthermore, I–V analysis demonstrates a dynamic range dependence on a‐TiO2 layer thickness and conduction mechanism that is akin to the conventionally developed electronic TiO2 synapses. The developed devices provide a time‐ and cost‐effective ecologically benign alternative toward biomimetic signal processing for future flexible neural networks.
Keywords
Research Article, Research Articles, a-TiO2, inkjet printed, inks, nanolayers, neuromorphic, plasticity
Sponsorship
EPSRC (EP/P02579X/1)
Identifiers
adem202200439
External DOI: https://doi.org/10.1002/adem.202200439
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336259
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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