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Elfwing, Anders
Publications (10 of 15) Show all publications
Elfwing, A. (2017). On decoration of biomolecular scaffolds with a conjugated polyelectrolyte. (Doctoral dissertation). Linköping: Linköping University Electronic Press
Open this publication in new window or tab >>On decoration of biomolecular scaffolds with a conjugated polyelectrolyte
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Biotemplating is the art of using a biological structure as a scaffold which is decorated with a functional material. In this fashion the structures will gain new functionalities and biotemplating offers a simple route of mass-producing mesoscopic material with new interesting properties. Biological structures are abundant and come in a great variety of elaborate and due to their natural origin they could be more suitable for interaction with biological systems than wholly synthetic materials. Conducting polymers are a novel class of material which was developed just 40 years ago and are well suited for interaction with biological material due to their organic composition. Furthermore the electronic properties of the conducting polymers can be tuned giving rise to dynamic control of the behavior of the material. Self-assembly processes are interesting since they do not require complicated or energy demanding processing conditions. This is particularly important as most biological materials are unstable at elevated temperatures or harsh environments. The main aim of this thesis is to show the possibility of using self-assembly to decorate a conducting polymer onto various biotemplates. Due to the intrinsic variety in charge, size and structure between the available natural scaffolds it is difficult, if not impossible, to find a universal method.

In this thesis we show how biotemplating can be used to create new hybrid materials by self-assembling a conducting polymer with biological structures based on DNA, protein, lipids and cellulose, and in this fashion create material with novel optical and electronic properties.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2017. p. 51
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1885
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:liu:diva-141675 (URN)10.3384/diss.diva-141675 (DOI)9789176854372 (ISBN)
Public defence
2017-10-19, Planck, Fysikhuset, Campus Valla, Linköping, 10:15 (English)
Opponent
Supervisors
Funder
Swedish Foundation for Strategic Research Knut and Alice Wallenberg Foundation
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2019-10-11Bibliographically approved
Admassie, S., Ajjan, F., Elfwing, A. & Inganäs, O. (2016). Biopolymer hybrid electrodes for scalable electricity storage. Materials Horizons, 3(3), 174-185
Open this publication in new window or tab >>Biopolymer hybrid electrodes for scalable electricity storage
2016 (English)In: Materials Horizons, ISSN 2051-6347, E-ISSN 2051-6355, Vol. 3, no 3, p. 174-185Article, review/survey (Refereed) Published
Abstract [en]

Powering the future, while maintaining a cleaner environment and a strong socioeconomic growth, is going to be one of the biggest challenges faced by mankind in the 21st century. The first step in overcoming the challenge for a sustainable future is to use energy more efficiently so that the demand for fossil fuels can be reduced drastically. The second step is a transition from the use of fossil fuels to renewable energy sources. In this sense, organic electrode materials are becoming increasingly attractive compared to inorganic electrode materials which have reached a plateau regarding performance and have severe drawbacks in terms of cost, safety and environmental friendliness. Using organic composites based on conducting polymers, such as polypyrrole, and abundant, cheap and naturally occurring biopolymers rich in quinones, such as lignin, has recently emerged as an interesting alternative. These materials, which exhibit electronic and ionic conductivity, provide challenging opportunities in the development of new charge storage materials. This review presents an overview of recent developments in organic biopolymer composite electrodes as renewable electroactive materials towards sustainable, cheap and scalable energy storage devices.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2016
National Category
Other Environmental Engineering
Identifiers
urn:nbn:se:liu:diva-128741 (URN)10.1039/c5mh00261c (DOI)000375296600002 ()
Note

Funding Agencies|Knut and Alice Wallenberg Foundation; Wallenberg Scholar grant

Available from: 2016-05-31 Created: 2016-05-30 Last updated: 2017-11-30
Molla, S., Elfwing, A. & Inganäs, O. (2016). Electrochemical Synthesis and Characterization of Interpenetrating Networks of Conducting Polymers for Enhanced Charge Storage. ADVANCED MATERIALS INTERFACES, 3(10), 1500533
Open this publication in new window or tab >>Electrochemical Synthesis and Characterization of Interpenetrating Networks of Conducting Polymers for Enhanced Charge Storage
2016 (English)In: ADVANCED MATERIALS INTERFACES, ISSN 2196-7350, Vol. 3, no 10, p. 1500533-Article in journal (Refereed) Published
Abstract [en]

A supercapacitor electrode consisting of an interpenetrating network of poly(aminoanthraquinone) (PAAQ) and poly(3,4-ethylenedioxythiophene) (PEDOT) is synthesized by a simple two-step galvanostatic deposition and characterized by electrochemical methods. By electrodepositing PEDOT on top of PAAQ, it is possible to access the quinones in PAAQ and as a result the specific capacitance of PAAQ increases from 90 to 383 F g(-1) and also significantly improves the charge-storage capacity from 25 to 106 mAh g(-1) at a discharge current of 1 A g(-1). These values are also significantly higher than most reported values for PEDOT and hybrids. Moreover, the hybrid material shows excellent stability with 91% of the initial capacitance being retained after 2000 cycles at a discharge rate of 2 A g(-1).

Place, publisher, year, edition, pages
WILEY-BLACKWELL, 2016
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:liu:diva-130669 (URN)10.1002/admi.201500533 (DOI)000380051100001 ()
Note

Funding Agencies|Knut and Alice Wallenberg Foundation

Available from: 2016-08-20 Created: 2016-08-19 Last updated: 2016-08-20
Ajjan, F., Casado, N., Rebis, T., Elfwing, A., Solin, N., Mecerreyes, D. & Inganäs, O. (2016). High performance PEDOT/lignin biopolymer composites for electrochemical supercapacitors. Journal of Materials Chemistry A, 4(5), 1838-1847
Open this publication in new window or tab >>High performance PEDOT/lignin biopolymer composites for electrochemical supercapacitors
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2016 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, no 5, p. 1838-1847Article in journal (Refereed) Published
Abstract [en]

Developing sustainable organic electrode materials for energy storage applications is an urgent task. We present a promising candidate based on the use of lignin, the second most abundant biopolymer in nature. This polymer is combined with a conducting polymer, where lignin as a polyanion can behave both as a dopant and surfactant. The synthesis of PEDOT/Lig biocomposites by both oxidative chemical and electrochemical polymerization of EDOT in the presence of lignin sulfonate is presented. The characterization of PEDOT/Lig was performed by UV-Vis-NIR spectroscopy, FTIR infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, cyclic voltammetry and galvanostatic charge-discharge. PEDOT doped with lignin doubles the specific capacitance (170.4 F g(-1)) compared to reference PEDOT electrodes (80.4 F g(-1)). The enhanced energy storage performance is a consequence of the additional pseudocapacitance generated by the quinone moieties in lignin, which give rise to faradaic reactions. Furthermore PEDOT/Lig is a highly stable biocomposite, retaining about 83% of its electroactivity after 1000 charge/discharge cycles. These results illustrate that the redox doping strategy is a facile and straightforward approach to improve the electroactive performance of PEDOT.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2016
National Category
Biological Sciences
Identifiers
urn:nbn:se:liu:diva-125323 (URN)10.1039/c5ta10096h (DOI)000368839200035 ()
Note

Funding Agencies|Power Papers project from the Knut and Alice Wallenberg foundation; Wallenberg Scholar grant from the Knut and Alice Wallenberg foundation; Marie Curie network Renaissance (NA); European Research Council by Starting Grant Innovative Polymers for Energy Storage (iPes) [306250]; Basque Government

Available from: 2016-02-23 Created: 2016-02-19 Last updated: 2017-11-30
Johansson, P., Jullesson, D., Elfwing, A., Liin, S., Musumeci, C., Zeglio, E., . . . Inganäs, O. (2015). Electronic polymers in lipid membranes. Scientific Reports, 5(11242)
Open this publication in new window or tab >>Electronic polymers in lipid membranes
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2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, no 11242Article in journal (Refereed) Published
Abstract [en]

Electrical interfaces between biological cells and man-made electrical devices exist in many forms, but it remains a challenge to bridge the different mechanical and chemical environments of electronic conductors (metals, semiconductors) and biosystems. Here we demonstrate soft electrical interfaces, by integrating the metallic polymer PEDOT-S into lipid membranes. By preparing complexes between alkyl-ammonium salts and PEDOT-S we were able to integrate PEDOT-S into both liposomes and in lipid bilayers on solid surfaces. This is a step towards efficient electronic conduction within lipid membranes. We also demonstrate that the PEDOT-S@alkyl-ammonium: lipid hybrid structures created in this work affect ion channels in the membrane of Xenopus oocytes, which shows the possibility to access and control cell membrane structures with conductive polyelectrolytes.

Place, publisher, year, edition, pages
Nature Publishing Group, 2015
National Category
Biophysics
Identifiers
urn:nbn:se:liu:diva-120045 (URN)10.1038/srep11242 (DOI)000356090400002 ()26059023 (PubMedID)
Note

Funding Agencies|Knut and Alice Wallenberg Foundation; Swedish Research Council

Available from: 2015-07-06 Created: 2015-07-06 Last updated: 2018-01-25
Molla, S., Elfwing, A., Skallberg, A. & Inganäs, O. (2015). Extracting metal ions from water with redox active biopolymer electrodes. ENVIRONMENTAL SCIENCE-WATER RESEARCH and TECHNOLOGY, 1(3), 326-331
Open this publication in new window or tab >>Extracting metal ions from water with redox active biopolymer electrodes
2015 (English)In: ENVIRONMENTAL SCIENCE-WATER RESEARCH and TECHNOLOGY, ISSN 2053-1400, Vol. 1, no 3, p. 326-331Article in journal (Refereed) Published
Abstract [en]

Renewable, environmentally friendly and cheap materials like lignin and cellulose have been considered as promising materials for use in energy storage technologies. Here, we report a new application for biopolymer electrodes where they can also be simultaneously used as ion pumps to purify industrial wastewater and drinking water contaminated with toxic metals. A ternary composite film consisting of a conducting polymer polypyrrole (PPy), biopolymer lignin (LG) and anthraquinonesulfonate (AQS) was synthesized by one-step galvanostatic polymerization from an aqueous electrolyte solution. X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) techniques revealed that lead ions can be extracted from a neutral aqueous solution containing lead ions by applying a potential, and can be released into another solution by reversing the polarity of the applied potential. Electrochemical quartz crystal microbalance was used to quantify the amount of metal ions that can be extracted and released.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2015
National Category
Biological Sciences Physical Sciences
Identifiers
urn:nbn:se:liu:diva-124144 (URN)10.1039/c4ew00097h (DOI)000366892000009 ()
Available from: 2016-01-22 Created: 2016-01-19 Last updated: 2016-01-22
Tang, Z., Elfwing, A., Melianas, A., Bergqvist, J., Bao, Q. & Inganäs, O. (2015). Fully-solution-processed organic solar cells with a highly efficient paper-based light trapping element. Journal of Materials Chemistry A, 3(48), 24289-24296
Open this publication in new window or tab >>Fully-solution-processed organic solar cells with a highly efficient paper-based light trapping element
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2015 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 3, no 48, p. 24289-24296Article in journal (Refereed) Published
Abstract [en]

We demonstrate the use of low cost paper as an efficient light-trapping element for thin film photovoltaics. We verify its use in fully-solution processed organic photovoltaic devices with the highest power conversion efficiency and the lowest internal electrical losses reported so far, the architecture of which - unlike most of the studied geometries to date - is suitable for upscaling, i.e. commercialization. The use of the paper-reflector enhances the external quantum efficiency (EQE) of the organic photovoltaic device by a factor of approximate to 1.5-2.5 over the solar spectrum, which rivals the light harvesting efficiency of a highly-reflective but also considerably more expensive silver mirror back-reflector. Moreover, by detailed theoretical and experimental analysis, we show that further improvements in the photovoltaic performance of organic solar cells employing PEDOT:PSS as both electrodes rely on the future development of high-conductivity and high-transmittance PEDOT:PSS. This is due optical losses in the PEDOT:PSS electrodes.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2015
National Category
Biological Sciences Physical Sciences
Identifiers
urn:nbn:se:liu:diva-123845 (URN)10.1039/c5ta07154b (DOI)000366163000014 ()
Note

Funding Agencies|Swedish Energy Agency; Knut and Alice Wallenberg Foundation through a Wallenberg Scholar grant; Knut and Alice Wallenberg Foundation through the project Power Papers

Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2017-12-01
Elfwing, A., Bäcklund, F., Musumeci, C., Inganäs, O. & Solin, N. (2015). Protein nanowires with conductive properties. Journal of Materials Chemistry C, 3(25), 6499-6504
Open this publication in new window or tab >>Protein nanowires with conductive properties
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2015 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 3, no 25, p. 6499-6504Article in journal (Refereed) Published
Abstract [en]

Herein we report on the investigation of self-assembled protein nanofibrils functionalized with metallic organic compounds. We have characterized the electronic behaviour of individual nanowires using conductive atomic force microscopy. In order to follow the self assembly process we have incorporated fluorescent molecules into the protein and used the energy transfer between the internalized dye and the metallic coating to probe the binding of the polyelectrolyte to the fibril.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2015
National Category
Biological Sciences
Identifiers
urn:nbn:se:liu:diva-120179 (URN)10.1039/c5tc00896d (DOI)000356529100010 ()
Note

Funding Agencies|Knut and Alice Wallenberg Foundation through a Wallenberg Scholar grant

Available from: 2015-07-13 Created: 2015-07-13 Last updated: 2017-12-04
Admassie, S., Elfwing, A., Jager, E., Bao, Q. & Inganäs, O. (2014). A renewable biopolymer cathode with multivalent metal ions for enhanced charge storage. JOURNAL OF MATERIALS CHEMISTRY A, 2(6), 1974-1979
Open this publication in new window or tab >>A renewable biopolymer cathode with multivalent metal ions for enhanced charge storage
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2014 (English)In: JOURNAL OF MATERIALS CHEMISTRY A, ISSN 2050-7488, Vol. 2, no 6, p. 1974-1979Article in journal (Refereed) Published
Abstract [en]

A ternary composite supercapacitor electrode consisting of phosphomolybdic acid (HMA), a renewable biopolymer, lignin, and polypyrrole was synthesized by a simple one-step simultaneous electrochemical deposition and characterized by electrochemical methods. It was found that the addition of HMA increased the specific capacitance of the polypyrrole-lignin composite from 477 to 682 F g(-1) ( at a discharge current of 1 A g(-1)) and also significantly improved the charge storage capacity from 6(to 128 mA h g(-1).

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2014
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-104646 (URN)10.1039/c3ta13876c (DOI)000329935700048 ()
Available from: 2014-02-20 Created: 2014-02-20 Last updated: 2018-01-25
Nagaraju, D. H., Rebis, T., Gabrielsson, R., Elfwing, A., Milczarek, G. & Inganäs, O. (2014). Charge Storage Capacity of Renewable Biopolymer/Conjugated Polymer Interpenetrating Networks Enhanced by Electroactive Dopants. ADVANCED ENERGY MATERIALS, 4(1)
Open this publication in new window or tab >>Charge Storage Capacity of Renewable Biopolymer/Conjugated Polymer Interpenetrating Networks Enhanced by Electroactive Dopants
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2014 (English)In: ADVANCED ENERGY MATERIALS, ISSN 1614-6832, Vol. 4, no 1Article in journal (Refereed) Published
Abstract [en]

Renewable materials are requested for large scale electrical storage, a coming necessity with the growth of intermittent solar and wind renewable electricity generation. Biopolymers are a source of inexpensive materials, in particular through the use of black liquor from paper production, a waste product. Interpenetrating networks of the biopolymer lignosulfonate (Lig) and conjugated polymer polypyrrole (Ppy) are synthesized by galvanostatic polymerization from pyrrole/lignosulfonate mixture in acidic aqueous electrolyte. Methoxy and phenolic functional group present in the non-conducting lignosulfonate are converted to quinone groups. The redox chemistry of quinones is used for charge storage, along with charge storage in polypyrrole. A large variation of the electrochemical activity between lignosulfonates obtained from different sources is observed. The charge storage capacities are significantly enhanced by also including another electroactive dopant, anthraquinone sulfonate (AQS). AQS redox peaks act as an internal reference (standard) to probe the redox electrochemistry of Lig. The synthesized Ppy(Lig) and Ppy(Lig-AQS) electrodes are characterized by cyclic voltammetry, galvanostatic charge-discharge cycling, electrochemical quartz crystal microbalance, and atomic force microscopy.

Place, publisher, year, edition, pages
Wiley-VCH Verlag, 2014
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-105037 (URN)10.1002/aenm.201300443 (DOI)000330594600002 ()
Available from: 2014-03-06 Created: 2014-03-06 Last updated: 2015-05-29
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