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Title: | A synaptic memristor based on two-dimensional layered WSe₂ nanosheets with short- and long-term plasticity | Authors: | Luo, S Liao, K Lei, P Jiang, T Chen, S Xie, Q Luo, W Huang, W Yuan, S Jie, W Hao, J |
Issue Date: | Apr-2021 | Source: | Nanoscale, 7 Apr. 2021, v. 13, no. 13, p. 6654-6660 | Abstract: | Neural synapses with diverse synaptic functions of short- and long-term plasticity are highly desired for developing complex neuromorphic systems. A memristor with its two terminals serving as pre- and post-neurons, respectively, can emulate two neuronal-based synaptic functions. In this work, multilayer two-dimensional (2D) layered WSe₂ nanosheets are synthesized by a salt-assisted chemical vapor deposition (CVD) method. Two-terminal memristors with a planar structure are fabricated based on the CVD-grown triangular WSe₂ nanosheets. The fabricated devices exhibit typical bipolar nonvolatile resistive switching behaviors with a high current ON/OFF ratio of up to 6 × 103 and good retention and endurance properties, suggesting good stability and reliability of the WSe₂-based memristors. Furthermore, the developed memristors demonstrate synaptic functions of short- and long-term plasticity (STP and LTP), as well as a transition from STP to LTP by applying consecutive pulse voltages. Moreover, the WSe₂-based memristors exhibits biological synaptic functions of long-term potentiation and depression, and paired-pulse facilitation. Thus, our 2D WSe₂ nanosheet based memristors not only exhibit stable and reliable nonvolatile resistive switching behaviors, but also show potential applications in mimicking biological synapses. | Publisher: | Royal Society of Chemistry | Journal: | Nanoscale | ISSN: | 2040-3364 | EISSN: | 2040-3372 | DOI: | 10.1039/d0nr08725d | Rights: | This journal is © The Royal Society of Chemistry 2021 The following publication Luo, S., Liao, K., Lei, P., Jiang, T., Chen, S., Xie, Q., ... & Hao, J. (2021). A synaptic memristor based on two-dimensional layered WSe 2 nanosheets with short-and long-term plasticity. Nanoscale, 13(13), 6654-6660 is available at https://doi.org/10.1039/d0nr08725d |
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Yuan_Synaptic_Memristor_Based.pdf | Pre-Published version | 1.29 MB | Adobe PDF | View/Open |
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