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Its coordination copolymer with Co(II) ions, [CoU]n, exhibits multimodal resistance changes similar to the synaptic responses observed in biological systems. More than 320 cycles of potentiation and depression measured in continuous sequence occurred without observing a significant current change, confirming the operational stability and reproducibility of the device based on the [CoU]n polymer. The synaptic effect of a device with an indium tin oxide (ITO)\/[CoU]n\/top-electrode (TE) configuration is more pronounced for the device with TE = Au compared to devices with TE = Al or Ga. However, the latter TEs provide a cost-effective approach without any significant compromise in device plasticity. The detected changes in the synaptic weight, about 12% for pair-pulse facilitation and 80% for its depression, together with a millisecond trigger and reading pulses that decay exponentially on the time scale typical of neurosynapses, justify the device\u2019s ability to learn and memorize. These properties offer potential applications in neuromorphic computation and brain-inspired synaptic devices.<\/jats:p>","DOI":"10.3390\/polym16040542","type":"journal-article","created":{"date-parts":[[2024,2,20]],"date-time":"2024-02-20T04:36:22Z","timestamp":1708403782000},"page":"542","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Synapse-Mimicking Memristors Based on 3,6-Di(tpy)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4607-7623","authenticated-orcid":false,"given":"Ambika","family":"Pandey","sequence":"first","affiliation":[{"name":"Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague, Czech Republic"},{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrei","family":"Chernyshev","sequence":"additional","affiliation":[{"name":"Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0100-9018","authenticated-orcid":false,"given":"Yadu Ram","family":"Panthi","sequence":"additional","affiliation":[{"name":"Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague, Czech Republic"},{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7325-8684","authenticated-orcid":false,"given":"Ji\u0159\u00ed","family":"Zedn\u00edk","sequence":"additional","affiliation":[{"name":"Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adriana","family":"\u0160turcov\u00e1","sequence":"additional","affiliation":[{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7704-1546","authenticated-orcid":false,"given":"Magdalena","family":"Konefa\u0142","sequence":"additional","affiliation":[{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olga","family":"Ko\u010dkov\u00e1","sequence":"additional","affiliation":[{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen H.","family":"Foulger","sequence":"additional","affiliation":[{"name":"Center for Optical Materials Science and Engineering Technology (COMSET), Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA"},{"name":"Department of Bioengineering, Clemson University, Clemson, SC 29634, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9412-2548","authenticated-orcid":false,"given":"Ji\u0159\u00ed","family":"Vohl\u00eddal","sequence":"additional","affiliation":[{"name":"Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9576-7551","authenticated-orcid":false,"given":"Ji\u0159\u00ed","family":"Pfleger","sequence":"additional","affiliation":[{"name":"Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsk\u00e9ho n\u00e1m. 2, 162 00 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"80","DOI":"10.1038\/nature06932","article-title":"The Missing Memristor Found","volume":"453","author":"Strukov","year":"2008","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1038\/nnano.2012.240","article-title":"Memristive Devices for Computing","volume":"8","author":"Yang","year":"2013","journal-title":"Nat. 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