Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions
The title compound, unimer <b>U</b> (<i>tpy</i> stands for 2,2′:6′,2″-terpyridin-4′-yl end-group), by itself shows the memristor effect with a retention time of 18 h and persistence of 11 h. Its coordination copolymer with Co(II) ions, <b>[CoU]<sub>n</sub>&l...
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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/16/4/542 |
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| author | Ambika Pandey Andrei Chernyshev Yadu Ram Panthi Jiří Zedník Adriana Šturcová Magdalena Konefał Olga Kočková Stephen H. Foulger Jiří Vohlídal Jiří Pfleger |
| author_facet | Ambika Pandey Andrei Chernyshev Yadu Ram Panthi Jiří Zedník Adriana Šturcová Magdalena Konefał Olga Kočková Stephen H. Foulger Jiří Vohlídal Jiří Pfleger |
| author_sort | Ambika Pandey |
| collection | DOAJ |
| description | The title compound, unimer <b>U</b> (<i>tpy</i> stands for 2,2′:6′,2″-terpyridin-4′-yl end-group), by itself shows the memristor effect with a retention time of 18 h and persistence of 11 h. Its coordination copolymer with Co(II) ions, <b>[CoU]<sub>n</sub></b>, 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 <b>[CoU]<sub>n</sub></b> polymer. The synaptic effect of a device with an indium tin oxide (ITO)/<b>[CoU]<sub>n</sub></b>/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’s ability to learn and memorize. These properties offer potential applications in neuromorphic computation and brain-inspired synaptic devices. |
| first_indexed | 2024-03-07T22:15:41Z |
| format | Article |
| id | doaj.art-238ea211feb04373b9cf7b47c5b362f0 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-07T22:15:41Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-238ea211feb04373b9cf7b47c5b362f02024-02-23T15:32:23ZengMDPI AGPolymers2073-43602024-02-0116454210.3390/polym16040542Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) IonsAmbika Pandey0Andrei Chernyshev1Yadu Ram Panthi2Jiří Zedník3Adriana Šturcová4Magdalena Konefał5Olga Kočková6Stephen H. Foulger7Jiří Vohlídal8Jiří Pfleger9Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague, Czech RepublicDepartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech RepublicFaculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague, Czech RepublicDepartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech RepublicInstitute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech RepublicInstitute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech RepublicInstitute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech RepublicCenter for Optical Materials Science and Engineering Technology (COMSET), Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USADepartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Albertov 6, 128 00 Prague, Czech RepublicInstitute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech RepublicThe title compound, unimer <b>U</b> (<i>tpy</i> stands for 2,2′:6′,2″-terpyridin-4′-yl end-group), by itself shows the memristor effect with a retention time of 18 h and persistence of 11 h. Its coordination copolymer with Co(II) ions, <b>[CoU]<sub>n</sub></b>, 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 <b>[CoU]<sub>n</sub></b> polymer. The synaptic effect of a device with an indium tin oxide (ITO)/<b>[CoU]<sub>n</sub></b>/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’s ability to learn and memorize. These properties offer potential applications in neuromorphic computation and brain-inspired synaptic devices.https://www.mdpi.com/2073-4360/16/4/542carbazolecoordination polymermemristormetallo-supramolecular polymersynapse-mimicking device2,2′:6′,2″-terpyridine |
| spellingShingle | Ambika Pandey Andrei Chernyshev Yadu Ram Panthi Jiří Zedník Adriana Šturcová Magdalena Konefał Olga Kočková Stephen H. Foulger Jiří Vohlídal Jiří Pfleger Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions Polymers carbazole coordination polymer memristor metallo-supramolecular polymer synapse-mimicking device 2,2′:6′,2″-terpyridine |
| title | Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions |
| title_full | Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions |
| title_fullStr | Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions |
| title_full_unstemmed | Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions |
| title_short | Synapse-Mimicking Memristors Based on 3,6-Di(<i>tpy</i>)-9-Phenylcarbazole Unimer and Its Copolymer with Cobalt(II) Ions |
| title_sort | synapse mimicking memristors based on 3 6 di i tpy i 9 phenylcarbazole unimer and its copolymer with cobalt ii ions |
| topic | carbazole coordination polymer memristor metallo-supramolecular polymer synapse-mimicking device 2,2′:6′,2″-terpyridine |
| url | https://www.mdpi.com/2073-4360/16/4/542 |
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