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Rechargeable, flexi...
Rechargeable, flexible and mediator-free biosupercapacitor based on transparent ITO nanoparticle modified electrodes acting in mu M glucose containing buffers
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- Bobrowski, Tim (author)
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany
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- Gonzalez-Arribas, Elena (author)
- Malmö universitet,Institutionen för biomedicinsk vetenskap (BMV)
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- Ludwig, Roland (author)
- Department of Food Science and Technology, BOKU University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
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- Toscano, Miguel D. (author)
- Novozymes A/S, Krogshoejvej 36, 2880 Bagsværd, Denmark
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- Shleev, Sergey (author)
- Malmö universitet,Institutionen för biomedicinsk vetenskap (BMV),A.N. Bach Institute of Biochemistry, 119071 Moscow, Russia; Kurchatov NBIC Centre, National Research Centre "Kurchatov Institute", 123182 Moscow, Russia
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- Schuhmann, Wolfgang (author)
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany
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(creator_code:org_t)
- Elsevier, 2018
- 2018
- English.
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In: Biosensors & bioelectronics. - : Elsevier. - 0956-5663 .- 1873-4235. ; 101, s. 84-89
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We present a transparent and flexible self-charging biosupercapacitor based on an optimised mediator- and membrane-free enzymatic glucose/oxygen biofuel cell. Indium tin oxide (ITO) nanoparticles were spray-coated on transparent conducting ITO supports resulting in a flocculent, porous and nanostructured electrode surface. By this, high capacitive currents caused by an increased electrochemical double layer as well as enhanced catalytic currents due to a higher number of immobilised enzyme molecules were obtained. After a chemical pretreatment with a silane derivative, bilirubin oxidase from Myrothecium verrucaria was immobilized onto the ITO nanostructured electrode surface under formation of a biocathode, while bioanodes were obtained by either immobilisation of cellobiose dehydrogenase from Corynascus thermophilus or soluble PQQ-dependent glucose dehydrogenase from Acinetobacter calcoaceticus. The latter showed a lower apparent K-M value for glucose conversion and higher catalytic currents at mu M glucose concentrations. Applying the optimised device as a biosupercapacitor in a discontinuous charge/discharge mode led to a generated power output of 0.030 mW/cm(2) at 50 mu M glucose, simulating the glucose concentration in human tears. This represents an enhancement by a factor of 350 compared to the power density obtained from the continuously operating biofuel cell with a maximum power output of 0.086 mu W/cm(2) under the same conditions. After 17 h of charging/discharging cycles a remarkable current enhancement was still measured. The entire device was transferred to flexible materials and applied for powering a flexible display showing its potential applicability as an intermittent power source in smart contact lenses.
Keyword
- Indium tin oxide
- Nanoparticle
- Biofuel cell
- Flexible biodevice
- Transparent biosupercapacitor
Publication and Content Type
- ref (subject category)
- art (subject category)
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