| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kousar, Ayesha
Aalto University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Advanced nanocellulose-based electrochemical sensor for tetracycline monitoringcitations
- 2024Enhancing electrocatalytic activity in metallic thin films through surface segregation of carboncitations
- 2024Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layerscitations
- 2024Effect of etchant gases on the structure and properties of carbon nanofiberscitations
- 2023Enhancing electrocatalytic activity in metallic thin films through surface segregation of carboncitations
- 2023Interface matters - Effects of catalyst layer metallurgy on macroscale morphology and electrochemical performance of carbon nanofiber electrodescitations
- 2021Nanostructured Geometries Strongly Affect Fouling of Carbon Electrodescitations
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article
Nanostructured Geometries Strongly Affect Fouling of Carbon Electrodes
Abstract
Tallennetaan lopullinen OA-artikkeli, kun julkaistu | openaire: EC/H2020/824070/EU//CONNECT ; Electrode fouling is a major factor that compro-mises the performance of biosensors inin vivousage. It can beroughly classified into (i) electrochemical fouling, caused by theanalyte and its reaction products, and (ii) biofouling, caused byproteins and other species in the measurement environment. Here,we examined the effect of electrochemical fouling [in phosphatebuffer saline (PBS)], biofouling [in cell-culture media (F12-K)with and without proteins], and their combination on the redoxreactions occurring on carbon-based electrodes possessing distinctmorphologies and surface chemistry. The effect of biofouling onthe electrochemistry of an outer sphere redox probe, [Ru-(NH3)6]3+, was negligible. On the other hand, fouling had amarked effect on the electrochemistry of an inner sphere redox probe, dopamine (DA). We observed that the surface geometryplayed a major role in the extent of fouling. The effect of biofouling on DA electrochemistry was the worst on planar pyrolyticcarbon, whereas the multiwalled carbon nanotube/tetrahedral amorphous carbon (MWCNT/ta-C), possessing spaghetti-likemorphology, and carbon nanofiber (CNF/ta-C) electrodes were much less seriously affected. The blockage of the adsorption sitesfor DA by proteins and other components of biological media and electrochemical fouling components (byproducts of DAoxidation) caused rapid surface poisoning. PBS washing for 10 consecutive cycles at 50 mV/s did not improve the electrodeperformance, except for CNF/ta-C, which performed better after PBS washing. Overall, this study emphasizes the combined effect ofbiological and electrochemical fouling to be critical for the evaluation of the functionality of a sensor. Thus, electrodes possessingcomposite nanostructures showed less surface fouling in comparison to those possessing planar geometry. ; Peer reviewed