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Conjugated Polyelectrolyte Blends for Electrochromic and Electrochemical Transistor Devices
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
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2015 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 27, no 18, 6385-6393 p.Article in journal (Refereed) Published
Abstract [en]

Two self-doped conjugated polyelectrolytes, having semiconducting and metallic behaviors, respectively, have been blended from aqueous solutions in order to produce materials with enhanced optical and electrical properties. The intimate blend of two anionic conjugated polyelectrolytes combine the electrical and optical properties of these, and can be tuned by blend stoichiometry. In situ conductance measurements have been done during doping of the blends, while UV vis and EPR spectroelectrochemistry allowed the study of the nature of the involved redox species. We have constructed an accumulation/depletion mode organic electrochemical transistor whose characteristics can be tuned by balancing the stoichiometry of the active material.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2015. Vol. 27, no 18, 6385-6393 p.
National Category
Materials Chemistry Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-122212DOI: 10.1021/acs.chemmater.5b02501ISI: 000361935000028OAI: oai:DiVA.org:liu-122212DiVA: diva2:864325
Note

Funding Agencies|Marie Curie network "Renaissance"; Knut and Alice Wallenberg foundation through Wallenberg Scholar grant; Swedish Research Council [VR-2014-3079, D0556101]; Carl Trygger Foundation [CTS 12:206]

Available from: 2015-10-26 Created: 2015-10-23 Last updated: 2016-11-21
In thesis
1. Self-doped Conjugated Polyelectrolytes for Bioelectronics Applications
Open this publication in new window or tab >>Self-doped Conjugated Polyelectrolytes for Bioelectronics Applications
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Self-doped conjugated polyelectrolytes (CPEs) are a class of conducting polymers constituted of a π-conjugated backbone and charged side groups. The ionic groups provide the counterions needed to balance the charged species formed in the CPEs backbones upon oxidation. As a result, addition of external counterions is not required, and the CPEs can be defined as selfdoped. The combination of their unique optical and electrical properties render them the perfect candidates for optoelectronic applications. Additionally, their “soft” nature provide for the mechanical compatibility necessary to interface with biological systems, rendering them promising materials for bioelectronics applications. CPEs solubility, aggregation state, and optoelectronic properties can be easily tuned by different means, such as blending or interaction with oppositely charged species (such as surfactants), in order to produce materials with the desired properties. In this thesis both the strategies have been explored to produce new functional materials that can be deposited to form a thin film and,  therefore, used as an active layer in organic electrochemical transistors (OECTs). Microstructure formation of the films as well as influence on devices operation and performance have been investigated. We also show that these methods can be exploited to produce materials whose uniquecombination of self-doping ability and hydrophobicity allows incorporation into the phospholipid double layer of biomembranes, while retaining their properties. As a result, self-doped CPEs can be used both as sensing elements to probe the physical state of biomembranes, and as functional ones providing them with new functionalities, such as electrical conductivity. Integration of conductive electronic biomembranes into OECTs devices has brought us one step forward on the interface of manmade technologies with biological systems.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2016. 68 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1802
National Category
Materials Chemistry Textile, Rubber and Polymeric Materials Inorganic Chemistry Other Materials Engineering Polymer Chemistry
Identifiers
urn:nbn:se:liu:diva-132731 (URN)10.3384/diss.diva-132731 (DOI)9789176856451 (ISBN)
Public defence
2016-12-15, Plank, Fysikhuset, Campus Valla, Linköping, 10:15 (English)
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Available from: 2016-11-21 Created: 2016-11-21 Last updated: 2016-11-21Bibliographically approved

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