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Rechargeable, flexible and mediator-free biosupercapacitor based on transparent ITO nanoparticle modified electrodes acting in mu M glucose containing buffers

Bobrowski, Tim (författare)
Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany
Gonzalez-Arribas, Elena (författare)
Malmö universitet,Institutionen för biomedicinsk vetenskap (BMV)
Ludwig, Roland (författare)
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. (författare)
Novozymes A/S, Krogshoejvej 36, 2880 Bagsværd, Denmark
Shleev, Sergey (författare)
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
Schuhmann, Wolfgang (författare)
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
Engelska.
Ingår i: Biosensors & bioelectronics. - : Elsevier. - 0956-5663 .- 1873-4235. ; 101, s. 84-89
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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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.

Nyckelord

Indium tin oxide
Nanoparticle
Biofuel cell
Flexible biodevice
Transparent biosupercapacitor

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