Artificial Synapses with Short- and Long-Term Memory for Spiking Neural Networks Based on Renewable Materials

Abstract

Emulation of biological synapses that perform memory and learning functions is an essential step toward realization of bioinspired neuromorphic systems. Artificial synaptic devices have been developed based mostly on inorganic materials and conventional semiconductor device fabrication processes. Here, we propose flexible biomemristor devices based on lignin by a simple solution process. Lignin is one of the most abundant organic polymers on Earth and is biocompatible, biodegradable, as well as environmentally benign. This memristor emulates several essential synaptic behaviors, including analog memory switching, short-term plasticity, long-term plasticity, spike-rate-dependent plasticity, and short-term to long-term transition. A flexible lignin-based artificial synapse device can be operated without noticeable degradation under mechanical bending test. These results suggest lignin can be a promising key component for artificial synapses and flexible electronic devices.

Phototunable Biomemory Based on Light‐Mediated Charge Trap

“…In another aspect, to endow programming bit precision with biomemories will offer significant advantages for the further application of bio‐RRAM, such as artificial synapse and neurons 40, 41, 42. As a noninvasive stimulus, photoprogramming allows the possibility of remote control memory devices with nearly arbitrary spatial and temporal precision, suggesting prominently enhanced operation speed and a localized control capability of different electronic components separately 43, 44, 45.…”

Functional Non‐Volatile Memory Devices: From Fundamentals to Photo‐Tunable Properties

“…Inspired by high efficiency of human brain, researchers started exploring plastic synapse-like memory devices with conventional field-effect transistor and ReRAM, which stimulate synapse functions by means of electric pulse. [35,[218][219][220][221][222][223][224][225] Nowadays, photo-tunable memory provides an additional terminal for the emulation of artificial synapse with relative low energy consumption. It is believed that lightassisted, even all-photonic memory will have potential applications in future electronic devices.…”

Control of Resistive Switching Voltage by Nanoparticle‐Decorated Wrinkle Interface

“…[1][2][3][4] Building polymer memory devices with low resistive switching voltage hold great importance in their fundamental study as well as the technical advancement of ultra-low power memory devices during their practical 3D integration. [1][2][3][4] Building polymer memory devices with low resistive switching voltage hold great importance in their fundamental study as well as the technical advancement of ultra-low power memory devices during their practical 3D integration.…”