17 results on '"Berggren, Magnus"'
Search Results
2. Continuous iontronic chemotherapy reduces brain tumor growth in embryonic avian in vivo models
- Author
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Handl, Verena, Waldherr, Linda, Arbring Sjöström, Theresia, Abrahamsson, Tobias, Seitanidou, Maria, Erschen, Sabine, Gorischek, Astrid, Bernacka-Wojcik, Iwona, Saarela, Helena, Tomin, Tamara, Honeder, Sophie Elisabeth, Distl, Joachim, Huber, Waltraud, Asslaber, Martin, Birner-Grünberger, Ruth, Schäfer, Ute, Berggren, Magnus, Schindl, Rainer, Patz, Silke, Simon, Daniel T., and Ghaffari-Tabrizi-Wizsy, Nassim
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- 2024
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3. Controlling the rate of posolyte degradation in all-quinone aqueous organic redox flow batteries by sulfonated nanocellulose based membranes: The role of crossover and Michael addition
- Author
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Lander, Sanna, Pang, Jiu, Erlandsson, Johan, Vagin, Mikhail, Jafari, Mohammad Javad, Korhonen, Leena, Yang, Hongli, Abrahamsson, Tobias, Ding, Penghui, Gueskine, Viktor, Mehandzhiyski, Aleksandar Y., Ederth, Thomas, Zozoulenko, Igor, Wågberg, Lars, Crispin, Reverant, and Berggren, Magnus
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- 2024
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4. Study on the Rectification of Ionic Diode Based on Cross-Linked Nanocellulose Bipolar Membranes
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Yang, Hongli, Edberg, Jesper, Say, Mehmet Girayhan, Erlandsson, Johan, Gueskine, Viktor, Wagberg, Lars, Berggren, Magnus, Engquist, Isak, Yang, Hongli, Edberg, Jesper, Say, Mehmet Girayhan, Erlandsson, Johan, Gueskine, Viktor, Wagberg, Lars, Berggren, Magnus, and Engquist, Isak
- Abstract
Nanocellulose-based membranes have attracted intense attention in bioelectronic devices due to their low cost, flexibility, biocompatibility, degradability, and sustainability. Herein, we demonstrate a flexible ionic diode using a cross-linked bipolar membrane fabricated from positively and negatively charged cellulose nanofibrils (CNFs). The rectified current originates from the asymmetric charge distribution, which can selectively determine the direction of ion transport inside the bipolar membrane. The mechanism of rectification was demonstrated by electrochemical impedance spectroscopy with voltage biases. The rectifying behavior of this kind of ionic diode was studied by using linear sweep voltammetry to obtain current-voltage characteristics and the time dependence of the current. In addition, the performance of cross-linked CNF diodes was investigated while changing parameters such as the thickness of the bipolar membranes, the scanning voltage range, and the scanning rate. A good long-term stability due to the high density cross-linking of the diode was shown in both current-voltage characteristics and the time dependence of current., Funding Agencies|Wallenberg Wood Science Center; VINNOVA (Digital Cellulose Centre); Knut and Alice Wallenberg Foundation (Wallenberg Wood Science Center)
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- 2024
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5. Vertical Organic Electrochemical Transistor Platforms for Efficient Electropolymerization of Thiophene Based Oligomers
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Gryszel, Maciej, Byun, Donghak, Burtscher, Bernhard, Abrahamsson, Tobias, Brodsky, Jan, Simon, Daniel T, Berggren, Magnus, Glowacki, Eric Daniel, Strakosas, Xenofon, Donahue, Mary, Gryszel, Maciej, Byun, Donghak, Burtscher, Bernhard, Abrahamsson, Tobias, Brodsky, Jan, Simon, Daniel T, Berggren, Magnus, Glowacki, Eric Daniel, Strakosas, Xenofon, and Donahue, Mary
- Abstract
Organic electrochemical transistors (OECTs) have emerged as promising candidates for various fields, including bioelectronics, neuromorphic computing, biosensors, and wearable electronics. OECTs operate in aqueous solutions, exhibit high amplification properties, and offer ion-to-electron signal transduction. The OECT channel consists of a conducting polymer, with PEDOT:PSS receiving the most attention to date. While PEDOT:PSS is highly conductive, and benefits from optimized protocols using secondary dopants and detergents, new p-type and n-type polymers are emerging with desirable material properties. Among these, low-oxidation potential oligomers are highly enabling for bioelectronics applications, however the polymers resulting from their polymerization lag far behind in conductivity compared with the established PEDOT:PSS. In this work we show that by careful design of the OECT geometrical characteristics, we can overcome this limitation and achieve devices that are on-par with transistors employing PEDOT:PSS. We demonstrate that the vertical architecture allows for facile electropolymerization of a family of trimers that are polymerized in very low oxidation potentials, without the need for harsh chemicals or secondary dopants. Vertical and planar OECTs are compared using various characterization methods. We show that vOECTs are superior platforms in general and propose that the vertical architecture can be expanded for the realization of OECTs for various applications., Funding agencies: European Research Council (AdG 2018 Magnus Berggren, 834677), the Swedish Research Council (2018-06197), and the Swedish Foundation for Strategic Research (RMX18-0083), the Swedish Research Council (2022-04807, 2023-05459), the Swedish Government Strategic Research Areas in Materials Science on Functional Materials at Linköping University (Faculty Grant SFOMat-LiU No. 2009-00971).
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- 2024
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6. Drug delivery via a 3D electro-swellable conjugated polymer hydrogel
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Abdel Aziz, Ilaria, Gladisch, Johannes, Griggs, Sophie, Moser, Maximilian, Biesmans, Hanne, Beloqui, Ana, McCulloch, Iain, Berggren, Magnus, Stavrinidou, Eleni, Abdel Aziz, Ilaria, Gladisch, Johannes, Griggs, Sophie, Moser, Maximilian, Biesmans, Hanne, Beloqui, Ana, McCulloch, Iain, Berggren, Magnus, and Stavrinidou, Eleni
- Abstract
Spatiotemporal controlled drug delivery minimizes side-effects and enables therapies that require specific dosing patterns. Conjugated polymers (CP) can be used for electrically controlled drug delivery; however so far, most demonstrations were limited to molecules up to 500 Da. Larger molecules could be incorporated only during the CP polymerization and thus limited to a single delivery. This work harnesses the record volume changes of a glycolated polythiophene p(g3T2) for controlled drug delivery. p(g3T2) undergoes reversible volumetric changes of up to 300% during electrochemical doping, forming pores in the nm-size range, resulting in a conducting hydrogel. p(g3T2)-coated 3D carbon sponges enable controlled loading and release of molecules spanning molecular weights of 800-6000 Da, from simple dyes up to the hormone insulin. Molecules are loaded as a combination of electrostatic interactions with the charged polymer backbone and physical entrapment in the porous matrix. Smaller molecules leak out of the polymer while larger ones could not be loaded effectively. Finally, this work shows the temporally patterned release of molecules with molecular weight of 1300 Da and multiple reloading and release cycles without affecting the on/off ratio.
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- 2024
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7. Electrochemical modulation of mechanical properties of glycolated polythiophenes
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Abdel Aziz, Ilaria, Gladisch, Johannes, Musumeci, Chiara, Moser, Maximilian, Griggs, Sophie, Kousseff, Christina J., Berggren, Magnus, Mcculloch, Iain, Stavrinidou, Eleni, Abdel Aziz, Ilaria, Gladisch, Johannes, Musumeci, Chiara, Moser, Maximilian, Griggs, Sophie, Kousseff, Christina J., Berggren, Magnus, Mcculloch, Iain, and Stavrinidou, Eleni
- Abstract
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., 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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- 2024
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8. In situ assembly of an injectable cardiac stimulator.
- Author
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Aydemir, Umut, Mousa, Abdelrazek H., Dicko, Cedric, Strakosas, Xenofon, Shameem, Muhammad Anwar, Hellman, Karin, Yadav, Amit Singh, Ekström, Peter, Hughes, Damien, Ek, Fredrik, Berggren, Magnus, Arner, Anders, Hjort, Martin, and Olsson, Roger
- Subjects
CARDIAC pacing ,YOUNG'S modulus ,SURGICAL emergencies ,CONDUCTING polymers ,NANOPARTICLES - Abstract
Without intervention, cardiac arrhythmias pose a risk of fatality. However, timely intervention can be challenging in environments where transporting a large, heavy defibrillator is impractical, or emergency surgery to implant cardiac stimulation devices is not feasible. Here, we introduce an injectable cardiac stimulator, a syringe loaded with a nanoparticle solution comprising a conductive polymer and a monomer that, upon injection, forms a conductive structure around the heart for cardiac stimulation. Following treatment, the electrode is cleared from the body, eliminating the need for surgical extraction. The mixture adheres to the beating heart in vivo without disrupting its normal rhythm. The electrofunctionalized injectable cardiac stimulator demonstrates a tissue-compatible Young's modulus of 21 kPa and a high conductivity of 55 S/cm. The injected electrode facilitates electrocardiogram measurements, regulates heartbeat in vivo, and rectifies arrhythmia. Conductive functionality is maintained for five consecutive days, and no toxicity is observed at the organism, organ, or cellular levels. Heart pacing devices are bulky or rely on surgery. Here, the authors present an injectable cardiac stimulator based on a nanoparticle solution which attaches to the heart and forms a conductive path to the skin for external connection. It can regulate heartbeats and is thereafter cleared from the body. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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9. Tuning the Emission of Bis-ethylenedioxythiophene-thiophenes upon Aggregation.
- Author
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Sahalianov, Ihor, Abrahamsson, Tobias, Priyadarshini, Diana, Mousa, Abdelrazek H., Arja, Katriann, Gerasimov, Jennifer Y., Linares, Mathieu, Simon, Daniel T., Olsson, Roger, Baryshnikov, Glib, Berggren, Magnus, and Musumeci, Chiara
- Published
- 2024
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10. Correction to “Study on the Rectification of Ionic Diode Based on Cross-Linked Nanocellulose Bipolar Membranes”
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Yang, Hongli, primary, Edberg, Jesper, additional, Say, Mehmet Girayhan, additional, Erlandsson, Johan, additional, Gueskine, Viktor, additional, Wågberg, Lars, additional, Berggren, Magnus, additional, and Engquist, Isak, additional
- Published
- 2024
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- View/download PDF
11. Study on the Rectification of Ionic Diode Based on Cross-Linked Nanocellulose Bipolar Membranes
- Author
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Yang, Hongli, primary, Edberg, Jesper, additional, Say, Mehmet Girayhan, additional, Erlandsson, Johan, additional, Gueskine, Viktor, additional, Wågberg, Lars, additional, Berggren, Magnus, additional, and Engquist, Isak, additional
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- 2024
- Full Text
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12. Vertical organic electrochemical transistor platforms for efficient electropolymerization of thiophene based oligomers
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Gryszel, Maciej, primary, Byun, Donghak, additional, Burtscher, Bernhard, additional, Abrahamsson, Tobias, additional, Brodsky, Jan, additional, Simon, Daniel Theodore, additional, Berggren, Magnus, additional, Glowacki, Eric Daniel, additional, Strakosas, Xenofon, additional, and Donahue, Mary Jocelyn, additional
- Published
- 2024
- Full Text
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13. Drug delivery via a 3D electro-swellable conjugated polymer hydrogel
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Abdel Aziz, Ilaria, primary, Gladisch, Johannes, additional, Griggs, Sophie, additional, Moser, Maximilian, additional, Biesmans, Hanne, additional, Beloqui, Ana, additional, McCulloch, Iain, additional, Berggren, Magnus, additional, and Stavrinidou, Eleni, additional
- Published
- 2024
- Full Text
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14. Conducting Polymer‐Based e‐Refinery for Sustainable Hydrogen Peroxide Production.
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Wu, Zhixing, Ding, Penghui, Gueskine, Viktor, Boyd, Robert, Głowacki, Eric Daniel, Odén, Magnus, Crispin, Xavier, Berggren, Magnus, Björk, Emma M., and Vagin, Mikhail
- Subjects
HYDROGEN peroxide ,SUSTAINABILITY ,HYDROGEN production ,OXYGEN evolution reactions ,CONDUCTING polymers ,ELECTROCHROMIC windows - Abstract
Electrocatalysis enables the industrial transition to sustainable production of chemicals using abundant precursors and electricity from renewable sources. De‐centralized production of hydrogen peroxide (H2O2) from water and oxygen of air is highly desirable for daily life and industry. We report an effective electrochemical refinery (e‐refinery) for H2O2 by means of electrocatalysis‐controlled comproportionation reaction (2H2O+O2→2H2O2), feeding pure water and oxygen only. Mesoporous nickel (II) oxide (NiO) was used as electrocatalyst for oxygen evolution reaction (OER), producing oxygen at the anode. Conducting polymer poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) drove the oxygen reduction reaction (ORR), forming H2O2 on the cathode. The reactions were evaluated in both half‐cell and device configurations. The performance of the H2O2 e‐refinery, assembled on anion‐exchange solid electrolyte and fed with pure water, was limited by the unbalanced ionic transport. Optimization of the operation conditions allowed a conversion efficiency of 80%. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
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15. eSoil: A low-power bioelectronic growth scaffold that enhances crop seedling growth.
- Author
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Oikonomou, Vasileios K., Huerta, Miriam, Sandéhn, Alexandra, Dreier, Till, Daguerre, Yohann, Lim, Hyungwoo, Berggren, Magnus, Pavlopoulou, Eleni, Näsholm, Torgny, Bech, Martin, and Stavrinidou, Eleni
- Subjects
CROP growth ,SEEDLINGS ,ROOT development ,ELECTRIC stimulation ,PLANT growth - Abstract
Active hydroponic substrates that stimulate on demand the plant growth have not been demonstrated so far. Here, we developed the eSoil, a low-power bioelectronic growth scaffold that can provide electrical stimulation to the plants’ root system and growth environment in hydroponics settings. eSoil’s active material is an organic mixed ionic electronic conductor while its main structural component is cellulose, the most abundant biopolymer. We demonstrate that barley seedlings that are widely used for fodder grow within the eSoil with the root system integrated within its porous matrix. Simply by polarizing the eSoil, seedling growth is accelerated resulting in increase of dry weight on average by 50% after 15 d of growth. The effect is evident both on root and shoot development and occurs during the growth period after the stimulation. The stimulated plants reduce and assimilate NO
3 − more efficiently than controls, a finding that may have implications on minimizing fertilizer use. However, more studies are required to provide a mechanistic understanding of the physical and biological processes involved. eSoil opens the pathway for the development of active hydroponic scaffolds that may increase crop yield in a sustainable manner. [ABSTRACT FROM AUTHOR]- Published
- 2024
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16. Electrochemical modulation of mechanical properties of glycolated polythiophenesElectronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d3mh01827j
- Author
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Abdel Aziz, Ilaria, Gladisch, Johannes, Musumeci, Chiara, Moser, Maximilian, Griggs, Sophie, Kousseff, Christina J., Berggren, Magnus, McCulloch, Iain, and Stavrinidou, Eleni
- Abstract
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 situduring 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.
- Published
- 2024
- Full Text
- View/download PDF
17. Single-walled Carbon Nanotubes Wrapped with Charged Polysaccharides Enhance Extracellular Electron Transfer.
- Author
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Shiraki T, Niidome Y, Roy A, Berggren M, Simon DT, Stavrinidou E, and Méhes G
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- Electron Transport, Materials Testing, Particle Size, Biocompatible Materials chemistry, Biocompatible Materials pharmacology, Electrodes, Nanotubes, Carbon chemistry, Shewanella metabolism, Polysaccharides chemistry, Polysaccharides pharmacology
- Abstract
Microbial electrochemical systems (MESs) rely on the microbes' ability to transfer charges from their anaerobic respiratory processes to electrodes through extracellular electron transfer (EET). To increase the generally low output signal in devices, advanced bioelectrical interfaces tend to augment this problem by attaching conducting nanoparticles, such as positively charged multiwalled carbon nanotubes (CNTs), to the base carbon electrode to electrostatically attract the negatively charged bacterial cell membrane. On the other hand, some reports point to the importance of the magnitude of the surface charge of functionalized single-walled CNTs (SWCNTs) as well as the size of functional groups for interaction with the cell membrane, rather than their polarity. To shed light on these phenomena, in this study, we prepared and characterized well-solubilized aqueous dispersions of SWCNTs functionalized by either positively or negatively charged cellulose-derivative polymers, as well as with positively charged or neutral small molecular surfactants, and tested the electrochemical performance of Shewanella oneidensis MR-1 in MESs in the presence of these functionalized SWCNTs. By simple injection into the MESs, the positively charged polymeric SWCNTs attached to the base carbon felt (CF) electrode, and as fluorescence microscopy revealed, allowed bacteria to attach to these structures. As a result, EET currents continuously increased over several days of monitoring, without bacterial growth in the electrolyte. Negatively charged polymeric SWCNTs also resulted in continuously increasing EET currents and a large number of bacteria on CF, although SWCNTs did not attach to CF. In contrast, SWCNTs functionalized by small-sized surfactants led to a decrease in both currents and the amount of bacteria in the solution, presumably due to the detachment of surfactants from SWCNTs and their detrimental interaction with cells. We expect our results will help researchers in designing materials for smart bioelectrical interfaces for low-scale microbial energy harvesting, sensing, and energy conversion applications.
- Published
- 2024
- Full Text
- View/download PDF
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