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Alarcon-Espejo P, Sarabia-Riquelme R, Matrone GM, Shahi M, Mahmoudi S, Rupasinghe GS, Le VN, Mantica AM, Qian D, Balk TJ, Rivnay J, Weisenberger M, Paterson AF. High-Hole-Mobility Fiber Organic Electrochemical Transistors for Next-Generation Adaptive Neuromorphic Bio-Hybrid Technologies. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2305371. [PMID: 37824715 DOI: 10.1002/adma.202305371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/29/2023] [Indexed: 10/14/2023]
Abstract
The latest developments in fiber design and materials science are paving the way for fibers to evolve from parts in passive components to functional parts in active fabrics. Designing conformable, organic electrochemical transistor (OECT) structures using poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) fibers has excellent potential for low-cost wearable bioelectronics, bio-hybrid devices, and adaptive neuromorphic technologies. However, to achieve high-performance, stable devices from PEDOT:PSS fibers, approaches are required to form electrodes on fibers with small diameters and poor wettability, that leads to irregular coatings. Additionally, PEDOT:PSS-fiber fabrication needs to move away from small batch processing to roll-to-roll or continuous processing. Here, it is shown that synergistic effects from a superior electrode/organic interface, and exceptional fiber alignment from continuous processing, enable PEDOT:PSS fiber-OECTs with stable contacts, high µC* product (1570.5 F cm-1 V-1 s-1 ), and high hole mobility over 45 cm2 V-1 s-1 . Fiber-electrochemical neuromorphic organic devices (fiber-ENODes) are developed to demonstrate that the high mobility fibers are promising building blocks for future bio-hybrid technologies. The fiber-ENODes demonstrate synaptic weight update in response to dopamine, as well as a form factor closely matching the neuronal axon terminal.
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Affiliation(s)
- Paula Alarcon-Espejo
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Ruben Sarabia-Riquelme
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | | | - Maryam Shahi
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Siamak Mahmoudi
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Gehan S Rupasinghe
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Vianna N Le
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Antonio M Mantica
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Dali Qian
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - T John Balk
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Jonathan Rivnay
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Matthew Weisenberger
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
| | - Alexandra F Paterson
- Department of Chemical and Materials Engineering, Centre for Applied Energy Research, University of Kentucky, Lexington, KY, 40506, USA
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