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Electrochemical mod...
Electrochemical modulation of mechanical properties of glycolated polythiophenes
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- Abdel Aziz, Ilaria (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Gladisch, Johannes (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Musumeci, Chiara (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Moser, Maximilian (författare)
- Univ Oxford, England
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- Griggs, Sophie (författare)
- Univ Oxford, England
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- Kousseff, Christina J. (författare)
- Univ Oxford, England
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- Berggren, Magnus (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Wallenberg Initiative Materials Science for Sustainability
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- Mcculloch, Iain (författare)
- Univ Oxford, England
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- Stavrinidou, Eleni (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Materials Horizons. - : ROYAL SOC CHEMISTRY. - 2051-6347 .- 2051-6355.
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
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- ref (ämneskategori)
- art (ämneskategori)
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