| 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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Jonas, Am
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2015Field-effect memory transistors based on arrays of nanowires of a ferroelectric polymer
- 2014The Ferro- to Paraelectric Curie Transition of a Strongly Confined Ferroelectric Polymercitations
- 2012Optimization of the structural parameters of new potentiometric pH and urea sensors based on polyaniline and a polysaccharide coupling layercitations
- 2011Melting and van der Waals Stabilization of PE Single Crystals Grown from Ultrathin Filmscitations
- 2010pH and Enzymatic Sensors Based on Nanostructured Conductive Polymer Films
- 2010Bidimensional Response Maps of Adaptive Thermo- and pH-Responsive Polymer Brushescitations
- 2006First insights into electrografted polymers by AFM-based force spectroscopycitations
- 2005A theoretical and experimental study of atomic-layer-deposited films onto porous dielectric substrates
- 2005Partial dewetting of polyethylene thin films on rough silicon dioxide surfaces.citations
- 2003Image analysis of transmission electron micrographs of semicrystalline polymers: a comparison with X-ray scattering resultscitations
- 2003Spinodal-like dewetting of thermodynamically-stable thin polymer films.citations
- 2001Characterization of the molecular structure of two highly isotactic polypropylenescitations
- 2000PEEK oligomers as physical model compounds for the polymer. 4. Lamellar microstructure and chain dynamics.citations
Places of action
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article
Optimization of the structural parameters of new potentiometric pH and urea sensors based on polyaniline and a polysaccharide coupling layer
Abstract
Screen-printed carbon electrodes were modified with polyaniline by electrochemical oxidation to produce a potentiometric pH transducer. The resulting pH sensor exhibited a fast, reproducible and sensitive potentiometric response of approximately 59 mV per pH unit from pH 4 to 8. The pH sensor response was found to be stable in time for up to one month. Such potentiometric response was obtained for thick polyaniline films. Thinner polymer films exhibited less sensitive responses and were found to have a smaller lifetime. The sensitivity of polyaniline to pH variations was then used to design an enzymatic biosensor. For that purpose, urease was immobilized on a polyelectrolyte multilayer film (PEM), obtained by the alternate deposition of charged polysaccharides (layer-by-layer assembly, LbL), over the polyaniline film. Covalent grafting of the urease enzyme to the PEM film was also tested using carbodiimide coupling reaction. The potentiometric response of this assembly to pH variations was similar to the one of polyaniline films, and its response to urea, from 10−4 to 10−1 mol L−1, exhibited a very high sensitivity combined to fast response, good lifetime and reproducibility. The number of polyelectrolyte layers composing the PEM film was also found to affect the response of the urea sensors.