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Electrochemical mod...
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Abdel Aziz, IlariaLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
(författare)
Electrochemical modulation of mechanical properties of glycolated polythiophenes
- Artikel/kapitelEngelska2024
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2024
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ROYAL SOC CHEMISTRY,2024
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LIBRIS-ID:oai:DiVA.org:liu-201847
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-201847URI
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https://doi.org/10.1039/d3mh01827jDOI
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Språk:engelska
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Sammanfattning på:engelska
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Funding Agencies|Swedish Foundation for Strategic Research [FFL18-0101]; Swedish Research Council [VR-2020-05045]; Swedish Government Strategic Research Area in Materials Science on Advanced Functional Materials at Linkoeping University [2009-00971]
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Electrochemical doping of organic mixed ionic-electronic conductors is key for modulating their conductivity, charge storage and volume enabling high performing bioelectronic devices such as recording and stimulating electrodes, transistors-based sensors and actuators. However, electrochemical doping has not been explored to the same extent for modulating the mechanical properties of OMIECs on demand. Here, we report a qualitative and quantitative study on how the mechanical properties of a glycolated polythiophene, p(g3T2), change in situ during electrochemical doping and de-doping. The Young's modulus of p(g3T2) changes from 69 MPa in the dry state to less than 10 MPa in the hydrated state and then further decreases down to 0.4 MPa when electrochemically doped. With electrochemical doping-dedoping the Young's modulus of p(g3T2) changes by more than one order of magnitude reversibly, representing the largest modulation reported for an OMIEC. Furthermore, we show that the electrolyte concentration affects the magnitude of the change, demonstrating that in less concentrated electrolytes more water is driven into the film due to osmosis and therefore the film becomes softer. Finally, we find that the oligo ethylene glycol side chain functionality, specifically the length and asymmetry, affects the extent of modulation. Our findings show that glycolated polythiophenes are promising materials for mechanical actuators with a tunable modulus similar to the range of biological tissues, thus opening a pathway for new mechanostimulation devices. This work investigates the changes in the mechanical properties of glycolated polythiophenes induced by electrochemical addressing and by electrolyte concentration, due to its ability to stabilize water.
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Gladisch, JohannesLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)johgl24
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Musumeci, ChiaraLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)chimu84
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Moser, MaximilianUniv Oxford, England
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Griggs, SophieUniv Oxford, England
(författare)
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Kousseff, Christina J.Univ Oxford, England
(författare)
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Berggren, MagnusLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Wallenberg Initiative Materials Science for Sustainability(Swepub:liu)magbe98
(författare)
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Mcculloch, IainUniv Oxford, England
(författare)
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Stavrinidou, EleniLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)elest58
(författare)
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Linköpings universitetLaboratoriet för organisk elektronik
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Ingår i:Materials Horizons: ROYAL SOC CHEMISTRY2051-63472051-6355
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