Natural Organic Materials Based Memristors and Transistors for Artificial Synaptic Devices in Sustainable Neuromorphic Computing Systems

Abstract

Natural organic materials such as protein and carbohydrates are abundant in nature, renewable, and biodegradable, desirable for the construction of artificial synaptic devices for emerging neuromorphic computing systems with energy efficient operation and environmentally friendly disposal. These artificial synaptic devices are based on memristors or transistors with the memristive layer or gate dielectric formed by natural organic materials. The fundamental requirement for these synaptic devices is the ability to mimic the memory and learning behaviors of biological synapses. This paper reviews the synaptic functions emulated by a variety of artificial synaptic devices based on natural organic materials and provides a useful guidance for testing and investigating more of such devices.

Unlocking the resistive switching in Acacia Senegal-based electrolyte for neuromorphic computation

“…Since b > d , τ 1 < τ 2 , which implies that the initial phase lasts shorter compared to the later phase, which goes in hand with the solid-state memristors. This PPF behaviour has already been observed in non-newtonian shear thickening memristors; 47 however, the rheology has been a point of closest miss till now, which is evident from the above discussions.…”

Tuning Electrochemical Stability of 5,10-Ditolylphenazine-Based Antiaromatic Materials for Unipolar Memristor toward Artificial Synapses Application

“…As a result, the device manifests a significant hysteresis loop in the voltage window between 0 and −3 V. Similar to DTA-DTPZ , the device with Cz-DTPZ and DTA-me-DTPZ also exhibited hysteresis I – V behavior with analogous set voltage and reset voltage. Different from the WORM memory typically observed in organic systems, − the devices employing DTA-DTPZ , Cz-DTPZ , and DTA-me-DTPZ as active materials exhibit repeatable nonvolatile states during switching processes. This can be also verified by the retention test, where DTA-DTPZ- and Cz-DTPZ- based devices possessed stable LRS and HRS over a time period of longer than 10 2 s and DTA-me-DTPZ -based devices demonstrated a time period over 10 4 s (Figure S7).…”

“…The high cost of rare metals also imposes restrictions on the widespread adoption of organometallic-based devices, particularly in mass production. Metal-free organic molecules, in contrast, offers advantages such as low cost, reduced toxicity, and high biocompatibility. − Nonetheless, a drawback of these pure-organic materials is their inherent instability, which poses challenges in achieving reliable and repeatable switching operations. Hence, in early studies, pure organic memristors predominately showed write-once-read-many (WORM) characteristics, − which greatly limit their applicability.…”

From fundamentals to frontiers: a review of memristor mechanisms, modeling and emerging applications

“…The exploration of protonic modulation in the realm of organic protonic memristors signifies a significant breakthrough in neuromorphic computing. 167,168 The study's emphasis on utilizing protons as the primary modulating ions presents a compelling advantage over other ions, particularly in their ability to operate within the approaching zero-power limit. This distinguishing feature holds great promise for advancing artificial synapses and neuromorphic systems, addressing critical energy efficiency concerns.…”