Solution-Processed Chitosan-Gated IZO-Based Transistors for Mimicking Synaptic Plasticity

Abstract

Indium-zinc-oxide (IZO)-based electric double layer (EDL) transistors gated by solution-processed chitosan electrolyte films are fabricated on glass substrates and used for mimicking synaptic plasticity. The conductance of the selfassembled IZO channel tuned by the proton electrostatic modulation and electrochemical doping is regarded as the synaptic weight. Synaptic behaviors like paired-pulse facilitation and longterm potentiation are mimicked in the chitosan-gated IZO-based EDL transistor. Our results suggest that gate pulse amplitude and number have great influence on the synaptic plasticity transition.

CMOS-compatible synaptic transistor gated by chitosan electrolyte-Ta2O5 hybrid electric double layer

“…. As a result, a slow polarisation reaction by the mobile ions in the chitosan electrolyte induces a counter-clockwise hysteresis and the ΔV th is 0.92 V 18 . The inset of Fig.…”

“…Chitosan-based bio-electrolyte is promising based on the following advantages, and it is widely investigated for the EDL. (1) Chitosan is the second most abundant polysaccharide on Earth and is extracted from the shells of crabs and shrimp; (2) Chitosan is an inexpensive, non-toxic, biocompatible polymer; (3) Chitosan is a low-cost solution that can achieve processability; (4) Chitosan has high-transparency and flexibility for its medium molecular weight; (5) Finally, chitosan has high-capacitance for protonic mobile ions 10 , 18 , 19 . In previous studies, numerous studies of chitosan electrolyte-based synaptic transistors, such as chitosan electrolyte-based metal–oxide–semiconductor channel-synaptic transistors on transparent glass substrate 19 , 20 , synaptic transistors on flexible freestanding chitosan-based membranes 10 , 21 , chitosan electrolyte-based SnO 2 nanowire channel synaptic transistors 22 , and two-dimensional MoS 2 channel-synaptic transistors 23 , have been extensively reported.…”

Freestanding Artificial Synapses Based on Laterally Proton‐Coupled Transistors on Chitosan Membranes

“…Recently, Ramanathan and co‐workers also demonstrated classical conditioning and unlearning behaviors in nickelate‐based synaptic transistors . Such synaptic transistors greatly enriched bionic electronic devices in terms of the limitations of materials and devices, which provides a new way to realize artificial neural networks and brain‐inspired computation …”

Proton Conducting Graphene Oxide/Chitosan Composite Electrolytes as Gate Dielectrics for New-Concept Devices

“…Chitosan is a naturally abundant, nontoxic cationic biopolymer obtained from deacetylation of chitin and has many applications in biotechnology and biomedicine. Due to its excellent film-forming ability, its applications as the gate dielectric material of transistors have been investigated and good results have been obtained 45 46 47 48 49 50 .…”