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Inkjet‐Printed Ag/a‐TiO2/Ag Neuromorphic Nanodevice Based on Functionalized Ink

Published version
Peer-reviewed

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Authors

Salonikidou, Barbara  ORCID logo  https://orcid.org/0000-0001-7922-061X
Mehonic, Adnan 
Takeda, Yasunori 
Tokito, Shizuo 
England, Jonathan 

Abstract

jats:sec<jats:label />jats:pThis 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‐TiOjats:sub2</jats:sub>/Ag electronic synapses. The versatility of the approach is further enhanced by the highly stable in‐house‐developed a‐TiOjats:sub2</jats:sub> 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, jats:italicI–V</jats:italic> analysis demonstrates a dynamic range dependence on a‐TiOjats:sub2</jats:sub> layer thickness and conduction mechanism that is akin to the conventionally developed electronic TiOjats:sub2</jats:sub> synapses. The developed devices provide a time‐ and cost‐effective ecologically benign alternative toward biomimetic signal processing for future flexible neural networks.</jats:p></jats:sec>

Description

Keywords

40 Engineering, 4018 Nanotechnology, Bioengineering

Journal Title

Advanced Engineering Materials

Conference Name

Journal ISSN

1438-1656
1527-2648

Volume Title

Publisher

Wiley
Sponsorship
EPSRC (EP/P02579X/1)