Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications
Inspired by the functioning of the human brain, organic synaptic transistors represent a promising avenue for developing neuromorphic technologies. However, achieving sustainability while maintaining performance and functionality remains a critical challenge. Here, we report on an innovative strateg...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Neuromorphic Computing and Engineering |
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| Online Access: | https://doi.org/10.1088/2634-4386/adbccd |
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| author | Natan L Nozella Guilherme S Selmi Nayrim B Guerra Marcelo R Piton Carlos F O Graeff Rafael F de Oliveira |
| author_facet | Natan L Nozella Guilherme S Selmi Nayrim B Guerra Marcelo R Piton Carlos F O Graeff Rafael F de Oliveira |
| author_sort | Natan L Nozella |
| collection | DOAJ |
| description | Inspired by the functioning of the human brain, organic synaptic transistors represent a promising avenue for developing neuromorphic technologies. However, achieving sustainability while maintaining performance and functionality remains a critical challenge. Here, we report on an innovative strategy where synthetic melanin (Mel)—a natural pigment known for its improved ionic–electronic coupling, high volumetric capacitance, and environmentally friendly characteristics—is blended with benchmark poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) to fabricate synaptic transistors. Mel/PEDOT:PSS blends having different amounts of Mel have been systematically evaluated as semiconducting layer in organic electrochemical transistors. Our findings reveal that Mel incorporation at different concentrations enables tunable synaptic responses, such as enhanced memory retention and access to multiple memory states. These effects arise from the unique properties of Mel which modulate the charge density of PEDOT:PSS in a controlled manner. This approach demonstrates the potential for developing highly stable, multi-level memory materials for organic neuromorphic devices while addressing sustainability goals. We believe our strategy can open new avenues via the integration of natural and bio-inspired materials into organic semiconductors towards the development of sustainable neuromorphic technologies. |
| format | Article |
| id | doaj-art-b30e2d336c6f4352bae778d2a75ef2e6 |
| institution | OA Journals |
| issn | 2634-4386 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Neuromorphic Computing and Engineering |
| spelling | doaj-art-b30e2d336c6f4352bae778d2a75ef2e62025-08-20T02:06:27ZengIOP PublishingNeuromorphic Computing and Engineering2634-43862025-01-015101401410.1088/2634-4386/adbccdMelanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applicationsNatan L Nozella0https://orcid.org/0000-0001-5119-8254Guilherme S Selmi1Nayrim B Guerra2Marcelo R Piton3Carlos F O Graeff4https://orcid.org/0000-0003-0162-8273Rafael F de Oliveira5https://orcid.org/0000-0001-8980-3587São Paulo State University (UNESP) , School of Sciences, POSMAT—Post-Graduate Program in Materials Science and Technology, Bauru 17033-360, SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano) , Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-100, SP, BrazilBrazilian Nanotechnology National Laboratory (LNNano) , Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-100, SP, Brazil; Institute of Physics ‘Gleb Wataghin’ (IFGW) , University of Campinas (UNICAMP), Campinas 13083-859, SP, BrazilSão Paulo State University (UNESP) , School of Sciences, POSMAT—Post-Graduate Program in Materials Science and Technology, Bauru 17033-360, SP, BrazilBrazilian Nanotechnology National Laboratory (LNNano) , Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-100, SP, BrazilSão Paulo State University (UNESP) , School of Sciences, POSMAT—Post-Graduate Program in Materials Science and Technology, Bauru 17033-360, SP, BrazilSão Paulo State University (UNESP) , School of Sciences, POSMAT—Post-Graduate Program in Materials Science and Technology, Bauru 17033-360, SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano) , Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-100, SP, Brazil; Institute of Physics ‘Gleb Wataghin’ (IFGW) , University of Campinas (UNICAMP), Campinas 13083-859, SP, BrazilInspired by the functioning of the human brain, organic synaptic transistors represent a promising avenue for developing neuromorphic technologies. However, achieving sustainability while maintaining performance and functionality remains a critical challenge. Here, we report on an innovative strategy where synthetic melanin (Mel)—a natural pigment known for its improved ionic–electronic coupling, high volumetric capacitance, and environmentally friendly characteristics—is blended with benchmark poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) to fabricate synaptic transistors. Mel/PEDOT:PSS blends having different amounts of Mel have been systematically evaluated as semiconducting layer in organic electrochemical transistors. Our findings reveal that Mel incorporation at different concentrations enables tunable synaptic responses, such as enhanced memory retention and access to multiple memory states. These effects arise from the unique properties of Mel which modulate the charge density of PEDOT:PSS in a controlled manner. This approach demonstrates the potential for developing highly stable, multi-level memory materials for organic neuromorphic devices while addressing sustainability goals. We believe our strategy can open new avenues via the integration of natural and bio-inspired materials into organic semiconductors towards the development of sustainable neuromorphic technologies.https://doi.org/10.1088/2634-4386/adbccdorganic neuromorphic devicesorganic electrochemical transistorsmelaninPEDOT:PSSsustainable electronics |
| spellingShingle | Natan L Nozella Guilherme S Selmi Nayrim B Guerra Marcelo R Piton Carlos F O Graeff Rafael F de Oliveira Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications Neuromorphic Computing and Engineering organic neuromorphic devices organic electrochemical transistors melanin PEDOT:PSS sustainable electronics |
| title | Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications |
| title_full | Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications |
| title_fullStr | Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications |
| title_full_unstemmed | Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications |
| title_short | Melanin/PEDOT:PSS organic synaptic transistors: a step towards sustainable neuromorphic applications |
| title_sort | melanin pedot pss organic synaptic transistors a step towards sustainable neuromorphic applications |
| topic | organic neuromorphic devices organic electrochemical transistors melanin PEDOT:PSS sustainable electronics |
| url | https://doi.org/10.1088/2634-4386/adbccd |
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