Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior
Abstract This paper demonstrates the use of molecular artificial synapses in neuromorphic computing systems designed for low energy consumption. A molecular junction, based on self‐assembled monolayers (SAMs) of alkanethiolates terminated with 2,2′‐bipyridine complexed with cobalt chloride, exhibits...
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| Format: | Article |
| Language: | English |
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Wiley
2025-06-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202505016 |
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| author | Chanjin Lim Taegil Kim YoungJu Park Daeho Kim ChaeHo Shin Suji Ha Jin‐Liang Lin Yuan Li Junwoo Park |
| author_facet | Chanjin Lim Taegil Kim YoungJu Park Daeho Kim ChaeHo Shin Suji Ha Jin‐Liang Lin Yuan Li Junwoo Park |
| author_sort | Chanjin Lim |
| collection | DOAJ |
| description | Abstract This paper demonstrates the use of molecular artificial synapses in neuromorphic computing systems designed for low energy consumption. A molecular junction, based on self‐assembled monolayers (SAMs) of alkanethiolates terminated with 2,2′‐bipyridine complexed with cobalt chloride, exhibits synaptic behaviors with an energy consumption of 8.0 pJ µm−2. Conductance can be modulated simply by applying pulses in the incoherent charge transport (CT) regime. Charge injection in this regime allows molecules to overcome the low energy barrier for C─C bond rotations, resulting in conformational changes in the SAMs. The reversible potentiation/depression process of conductance achieves 90% accuracy in recognizing patterns from the Modified National Institute of Standards and Technology (MNIST) handwritten digit database. The molecular junction further exhibits both rectifying and conductance hysteresis behaviors, showing potential for use in selector‐free synaptic arrays that efficiently suppress sneak currents. |
| format | Article |
| id | doaj-art-fa2bba221a854bd4a32177b4649abefc |
| institution | DOAJ |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-fa2bba221a854bd4a32177b4649abefc2025-08-20T03:22:15ZengWileyAdvanced Science2198-38442025-06-011223n/an/a10.1002/advs.202505016Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic BehaviorChanjin Lim0Taegil Kim1YoungJu Park2Daeho Kim3ChaeHo Shin4Suji Ha5Jin‐Liang Lin6Yuan Li7Junwoo Park8Department of Chemistry Sogang University Seoul 04107 Republic of KoreaDepartment of Chemistry Sogang University Seoul 04107 Republic of KoreaDepartment of Chemistry Sogang University Seoul 04107 Republic of KoreaBruker Nano Surface Bruker Korea Co, Ltd. Seoul 05840 Republic of KoreaDivision of Chemical and Material Metrology Korea Research Institute of Standards and Science Daejeon 34113 Republic of KoreaDepartment of Chemistry Sogang University Seoul 04107 Republic of KoreaKey Laboratory of Organic Optoelectronics and Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 ChinaKey Laboratory of Organic Optoelectronics and Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 ChinaDepartment of Chemistry Sogang University Seoul 04107 Republic of KoreaAbstract This paper demonstrates the use of molecular artificial synapses in neuromorphic computing systems designed for low energy consumption. A molecular junction, based on self‐assembled monolayers (SAMs) of alkanethiolates terminated with 2,2′‐bipyridine complexed with cobalt chloride, exhibits synaptic behaviors with an energy consumption of 8.0 pJ µm−2. Conductance can be modulated simply by applying pulses in the incoherent charge transport (CT) regime. Charge injection in this regime allows molecules to overcome the low energy barrier for C─C bond rotations, resulting in conformational changes in the SAMs. The reversible potentiation/depression process of conductance achieves 90% accuracy in recognizing patterns from the Modified National Institute of Standards and Technology (MNIST) handwritten digit database. The molecular junction further exhibits both rectifying and conductance hysteresis behaviors, showing potential for use in selector‐free synaptic arrays that efficiently suppress sneak currents.https://doi.org/10.1002/advs.202505016anion reaction dynamicsmolecular electronicsmolecular memristorneuromorphic computingquantum tunneling |
| spellingShingle | Chanjin Lim Taegil Kim YoungJu Park Daeho Kim ChaeHo Shin Suji Ha Jin‐Liang Lin Yuan Li Junwoo Park Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior Advanced Science anion reaction dynamics molecular electronics molecular memristor neuromorphic computing quantum tunneling |
| title | Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior |
| title_full | Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior |
| title_fullStr | Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior |
| title_full_unstemmed | Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior |
| title_short | Electric Field‐Driven Conformational Changes in Molecular Memristor and Synaptic Behavior |
| title_sort | electric field driven conformational changes in molecular memristor and synaptic behavior |
| topic | anion reaction dynamics molecular electronics molecular memristor neuromorphic computing quantum tunneling |
| url | https://doi.org/10.1002/advs.202505016 |
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