| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] UNESP Sao Paulo State Univ, Sch Sci, POSMAT Postgrad Program Mat Sci & Technol, Av Eng Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil
[2] Fed Univ Santa Catarina UFSC, Dept Phys, Postgrad Program Phys, BR-88040900 Florianopolis, SC - Brazil
[3] UNESP Sao Paulo State Univ, Sch Sci, Dept Phys, Av Eng Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | CHEMISTRYSELECT; v. 3, n. 34, p. 9794-9802, SEP 14 2018. |
| Web of Science Citations: | 4 |
| Abstract | |
Neuromorphic hardware systems that simulate functions of biological brain synapses have been widely investigated due to their possible application in brain-inspired computing. We hereby report on a novel electrochemical state machine based on Zn:CdS thin films. The memory switching mechanism involves the cation exchange of Cu2+ and Zn2+ acting as inorganic ``neurotransmitters{''}. Similarly to the synapse-neuro- transmitter interactions, Cu2+ ions increase the conductivity and the electrocatalytic activity of Zn:CdS towards the ferrocene/ferrocenium redox process. The cationic substitution of Zn2+ by Cu2+ in the film has shown significant changes in the electrochemical characteristic of the device. Such effects have been investigated with both alternated current (impedance) and direct current (voltammetry and I vs V) measurements. The cation exchange mechanism allows to write and store an electrochemical information into the device. Such information can be gradually erased by exchanging the absorbed Cu2+ ions with Zn2+. By means of a timed soaking, of the active area, with Cu2+ and Zn2+ diethyldithiocarbamates, the device can be driven through multiple conduction states, making it suitable for applications in artificial synapses research and memory storage systems. (AU) | |
| FAPESP's process: | 16/17302-8 - Fabrication of ReRAM memory devices based on CuxS and COS thin films |
| Grantee: | Mirko Congiu |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/25028-5 - Global evaluation and optimization of dye sensitized hybrid solar cells |
| Grantee: | Carlos Frederico de Oliveira Graeff |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |
| FAPESP's process: | 08/57872-1 - National Institute for Materials Science in Nanotechnology |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Projects - Thematic Grants |