Journal
MATERIALS HORIZONS
Volume 8, Issue 7, Pages 2041-2049Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1mh00315a
Keywords
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Funding
- Electron Microscope Center of Shenzhen University
- National Natural Science Foundation of China [62074104, 61974093]
- Guangdong Province Special Support Plan for High-Level Talents [2017TQ04X082]
- Guangdong Provincial Department of Science and Technology [2018B030306028]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20180507182042530, RCYX20200714114524157, JCYJ20180507182000722]
- Natural Science Foundation of SZU
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Covalent organic framework (COF) RRAM demonstrates excellent performance with electroforming-free resistive switching behavior, low variability, and outstanding retention capability. COF materials can alter conductivity by absorbing small molecules, enabling the construction of an alcohol gas recognition system and emulation of the effects of alcohol on the human nervous system.
Resistive random access memories (RRAMs) based on the electrochemical metallization mechanism (ECM) have potential applications in high-density data storage and efficient neuromorphic computing. However, the high variability of ECM devices still hinders their application in artificial intelligence owing to the random formation of conductive filaments (CFs). Here, we demonstrate 2D covalent organic framework (COF) RRAM with electroforming-free resistive switching behavior, low spatial/temporal variations, and excellent retention capability up to 10(5) s. The one-dimensional channels of the oriented COF-5 film can not only confine the shape of filaments but also modulate the transition direction of Ag ions. Moreover, alcohol vapors could activate the device to achieve gas-mediated multilevel resistive switching since COF materials can absorb small molecules through host guest interactions to vary the conductivity. An alcohol gas recognition system constructed by integrating the COF RRAM as a sensor and filter part with the k-nearest neighbors (KNN) algorithm as a classifier was demonstrated with a recognition accuracy of 87.2%. Furthermore, the effect of alcohol inhibition stimulation in the human nervous system is successfully emulated by the COF RRAM.
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