Thermodynamic Equilibrium‐Nonequilibrium Competition in Nanofilaments for Achieving Complementary Electronic Synapses. (30th October 2022)

• Record Type: Journal Article
• Authors: Guo, Jiawei; Li, Wenhao; Liao, Yitao; Shen, Yiwei; Wang, Kun; Suk, Chan Hee; Zhou, Xiongtu; Zhang, Yongai; Wu, Chaoxing; Guo, Tailiang; Kim, Tae Whan
• Is Part Of: Advanced functional materials. Volume 32:Number 51(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-30
• Subjects: chemical functional groups -- complementary e‐synapses -- electrochemical metallization mechanisms -- electronic synapses -- metal‐ion nanochannels; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202207885
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: In the human brain, the natural complementary behaviors of synapse connections, which are enhanced and weakened through the participation of astrocytes and microglias, play an important role in the process of training and memory. Even though memristors based on the electrochemical metallization mechanism (ECM) have great potential in realizing electronic synapses (e‐synapses), the lack of complementary ECM e‐synapses has, to a certain extent, hindered the construction of artificial neural networks. In this study, the thermodynamic equilibrium‐nonequilibrium competition (TC) in nanofilaments is meticulously designed by modifying the metal‐ion nanochannels to achieve complementary ECM e‐synapses. The evolution in the morphology of a TC‐induced nanofilament includes a thinning behavior of the nanofilaments caused by electrical stimulation and a coarsening behavior caused by metal‐ion chelation. The TC effect leads to a decrease in the conductance under positive pulse stimulation and to an increase in the conductance while resting, these behaviors being exactly complementary to those of a conventional ECM e‐synapse. Finally, the feasibility of fabricating logic gate circuits with learning capability based on complementary ECM e‐synapses is verified using behavioral‐level modeling. These ECM e‐synapses with complementary functions are expected to be significant to researchers in the field of large neural network systems. Abstract : Electrochemical metallization mechanism (ECM) electronic synapses (e‐synapses) with behavior that is complementary to that of conventional ECM e‐synapses are demonstrated. The thermodynamic equilibrium–nonequilibrium competition in the nanofilaments is meticulously designed to realize the complementary behavior. The feasibility of fabricating logic gate circuits with learning function based on complementary ECM e‐synapses is verified using behavioral‐level modeling.