| 1. |
- Gonzalez-Arribas, Elena, et al.
(författare)
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Transparent and Capacitive Bioanode Based on Specifically Engineered Glucose Oxidase
- 2016
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Ingår i: Electroanalysis. - : John Wiley & Sons. - 1040-0397 .- 1521-4109. ; 28:6, s. 1290-1297
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Tidskriftsartikel (refereegranskat)abstract
- Here the authors detail an optimized transparent capacitive glucose oxidizing bioanode, capable of supplying current densities of 10 μA cm-2 at applied potentials of 0.1 V-0.2 V vs. SCE, when continuously performing in a simple phosphate buffer, pH 7.4 and artificial human tears, both with a glucose concn. of 0.05 mM only. When operating in pulse mode, the bioanode was able to deliver current densities ≤21 μA cm-2 at the beginning of the pulse with 571 μC cm-2 total charges stored. The biogenic part of the enzymic device was a recombinant glucose oxidase mutant from Penicillium amagasakiense with high catalytic efficiency towards glucose, up to 14.5x104 M-1 s-1. The nonbiogenic part of the anodic system was based on a poly(3,4-ethylenedioxythiophene)-graphene nanocomposite, as a highly capacitive component with a capacitance d. in the 1 mF cm-2 range, multi-walled carbon nanotubes, as an addnl. nanostructuring element, and a conductive org. complex, as an electron shuttle between the redox enzyme and the electrode surface. The bioanode could potentially serve as a prototype of a double-function enzymic anode for hybrid elec. power biodevices, energizing smart contact lenses.
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| 2. |
- Pankratov, Dmitry, et al.
(författare)
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Tear Based Bioelectronics
- 2016
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Ingår i: Electroanalysis. - : John Wiley & Sons. - 1040-0397 .- 1521-4109. ; 28:6, s. 1250-1266
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Forskningsöversikt (refereegranskat)abstract
- A review. This work provides an overview of the recent advances in the field of tear-based wearable electrochem. biodevices, including non-invasive biosensors, biol. fuel cells and biosupercapacitors. Contact lenses are attractive platforms for fabricating non-invasive self-contained gadgets for different applications, starting from devices with casual or mundane purposes only, like personalized smart lenses with direct (invisible for others) displays, and ending with biomedical devices for continuous fitness status and/or health care monitoring. Key requirements and challenges that confront researchers in this exciting area are discussed.
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| 3. |
- Parunova, Yulia, et al.
(författare)
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Potentially implantable biocathode with the function of charge accumulation based on nanocomposite of polyaniline/carbon nanotubes
- 2016
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Ingår i: Russian journal of electrochemistry. - : Springer. - 1023-1935 .- 1608-3342. ; 52:12, s. 1166-1171
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Tidskriftsartikel (refereegranskat)abstract
- A potentially implantable biocathode with the function of charge accumulation based on a nanobiocomposite including multiwall carbon nanotubes, polyaniline, and bilirubin oxidase is developed. The regularities of the functioning of the obtained electrode are studied in air-satd. phosphate buffer soln., pH 7.4 (PB), and also in phosphate buffer soln. contg. redox-active blood components (BMB). The open circuit potential of the biocathode is 0.33 and 0.08 V vs. the SCE in PB and BMB, resp.; it is completely restored after at least three self-charge/discharge cycles with connection to resistors with different resistance. Bioelectrocatalytic c.d. of oxygen redn. is 0.50 and 0.42 mA cm-2 with the residual activity of 78 and 60% of the initial value after 12 h of continuous operation in PB at 25°C and in BMB at 37°C, resp.
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