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Publications (4 of 4) Show all publications
Poxson, D. J., Gabrielsson, E. O., Bonisoli, A., Linderhed, U., Abrahamsson, T., Matthiesen, I., . . . Simon, D. T. (2019). Capillary-Fiber Based Electrophoretic Delivery Device. ACS Applied Materials and Interfaces, 11(15), 14200-14207
Open this publication in new window or tab >>Capillary-Fiber Based Electrophoretic Delivery Device
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2019 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 11, no 15, p. 14200-14207Article in journal (Refereed) Published
Abstract [en]

Organic electronic ion pumps (OEIPs) are versatile tools for electrophoretic delivery of substances with high spatiotemporal resolution. To date, OEIPs and similar iontronic components have been fabricated using thin-film techniques and often rely on laborious, multistep photolithographic processes. OEIPs have been demonstrated in a variety of in vitro and in vivo settings for controlling biological systems, but the thin-film form factor and limited repertoire of polyelectrolyte materials and device fabrication techniques unnecessarily constrain the possibilities for miniaturization and extremely localized substance delivery, e.g., the greater range of pharmaceutical compounds, on the scale of a single cell. Here, we demonstrate an entirely new OEIP form factor based on capillary fibers that include hyperbranched polyglycerols (dPGs) as the selective electrophoretic membrane. The dPGs enable electrophoretic channels with a high concentration of fixed charges and well-controlled cross-linking and can be realized using a simple "one-pot" fluidic manufacturing protocol. Selective electrophoretic transport of cations and anions of various sizes is demonstrated, including "large" substances that are difficult to transport with other OEIP technologies. We present a method for tailoring and characterizing the electrophoretic channels' fixed charge concentration in the operational state. Subsequently, we compare the experimental performance of these capillary OEIPs to a computational model and explain unexpected features in the ionic current for the transport and delivery of larger, lower-mobility ionic compounds. From this model, we are able to elucidate several operational and design principles relevant to miniaturized electrophoretic drug delivery technologies in general. Overall, the compactness of the capillary OEIP enables electrophoretic delivery devices with probelike geometries, suitable for a variety of ionic compounds, paving the way for less-invasive implantation into biological systems and for healthcare applications.

Place, publisher, year, edition, pages
American Chemical Society, 2019
Keywords
bioelectronics, electrophoresis, hyperbranched polymer, iontronics, polyelectrolyte, substance delivery, Approximation theory, Biological materials, Biological systems, Dendrimers, Electric charge, Photolithography, Polyelectrolytes, Targeted drug delivery, Thin films, Drug delivery technologies, Hyperbranched polyglycerols, Hyperbranched polymers, Photolithographic process, Spatio-temporal resolution, Controlled drug delivery
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38509 (URN)10.1021/acsami.8b22680 (DOI)2-s2.0-85064343742 (Scopus ID)
Available from: 2019-05-03 Created: 2019-05-03 Last updated: 2019-08-06Bibliographically approved
Cherian, D., Armgarth, A., Beni, V., Linderhed, U., Tybrandt, K., Nilsson, D., . . . Berggren, M. (2019). Large-area printed organic electronic ion pumps [Letter to the editor]. Flexible and Printed Electronics, 4(2)
Open this publication in new window or tab >>Large-area printed organic electronic ion pumps
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2019 (English)In: Flexible and Printed Electronics, Vol. 4, no 2Article in journal, Letter (Other academic) Published
Abstract [en]

Biological systems use a large variety of ions and molecules of different sizes for signaling. Precise electronic regulation of biological systems therefore requires an interface which translates the electronic signals into chemically specific biological signals. One technology for this purpose that has been developed during the last decade is the organic electronic ion pump (OEIP). To date, OEIPs have been fabricated by micropatterning and labor-intensive manual techniques, hindering the potential application areas of this promising technology. Here we show, for the first time, fully screen-printed OEIPs. We demonstrate a large-area printed design with manufacturing yield >90%. Screen-printed cation- and anion-exchange membranes are both demonstrated with promising ion selectivity and performance, with transport verified for both small ions (Na+, K+, Cl) and biologically-relevant molecules (the cationic neurotransmitter acetylcholine, and the anionic anti-inflammatory salicylic acid). These advances open the 'iontronics' toolbox to the world of printed electronics, paving the way for a broader arena for applications.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-39699 (URN)10.1088/2058-8585/ab17b1 (DOI)
Available from: 2019-08-08 Created: 2019-08-08 Last updated: 2019-08-08Bibliographically approved
Sani, N., Linderhed, U. & Sandberg, M. (2018). Monolithically integrated electrochemical energy storage modules. Journal of Energy Storage, 16, 139-144
Open this publication in new window or tab >>Monolithically integrated electrochemical energy storage modules
2018 (English)In: Journal of Energy Storage, ISSN 2352-152X, Vol. 16, p. 139-144Article in journal (Refereed) Published
Abstract [en]

The concept of monolithic integration of electrochemical energy storage modules was tested on serially connected supercapacitor cells balanced by passive resistive dissipation. Five electrode pairs with collectors, interconnects, corrosion protection layers, electrode material and shunt resistors were printed on a single substrate. The printed patterns, lamination film, and a hot-sealing tool were designed so that upon folding, lamination, and electrolyte filling and sealing, five serial cells were formed with each having a shunt resistance. In an open circuit idling period following charge and discharge, the standard deviation of the individual cell voltages decreased, demonstrating the balancing function of this so called “modulit”, a short term proposed for a monolithically integrated electrochemical energy storage module.

Keywords
Balancing, Monolithic integration, Printed serial modules, Resistive dissipation, Supercapacitors
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33427 (URN)10.1016/j.est.2018.01.004 (DOI)2-s2.0-85041378473 (Scopus ID)
Available from: 2018-03-09 Created: 2018-03-09 Last updated: 2019-06-27Bibliographically approved
Xiong, K., Tordera, D., Emilsson, G., Olsson, O., Linderhed, U., Jonsson, M. P. & Dahlin, A. B. (2017). Switchable Plasmonic Metasurfaces with High Chromaticity Containing only Abundant Metals. Nano letters (Print), 17(11), 7033-7039
Open this publication in new window or tab >>Switchable Plasmonic Metasurfaces with High Chromaticity Containing only Abundant Metals
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2017 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 17, no 11, p. 7033-7039Article in journal (Refereed) Published
Abstract [en]

Plasmonic color generation offers several advantages but is also limited by the cost and availability of noble metals like gold. In this work, we present color-tunable metasurfaces with high chromaticity and reflectivity consisting of an aluminum mirror, a dielectric spacer, and a plasmonic nanohole array in copper. Copper is shown to be an excellent alternative to gold when properly protected from oxidation and makes it possible to generate a wide RGB gamut covering 27% of the standard RGB. By patterning the metasurfaces into microscale pixel triplets, color photos can be well reproduced with high resolution over wafer-sized areas. Further, we demonstrate active modulation of the reflected intensity using an electrochromic conductive polymer deposited on top of the nanostructures by screen printing. This technology opens up for ultrathin and flexible reflective displays in full color, that is, plasmonic electronic paper, compatible with large-scale sustainable production.

Keywords
colors, electrochromism, electronic paper, nanostructures, Plasmons, Color, Copper, Flexible displays, Gold, Screen printing, Aluminum mirrors, Color generation, Conductive Polymer, Dielectric spacers, Electrochromics, Nanohole arrays, Reflective display, Sustainable production
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-32806 (URN)10.1021/acs.nanolett.7b03665 (DOI)2-s2.0-85033215998 (Scopus ID)
Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2019-06-27Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9605-9151

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