Potentiometric miniaturized pH sensors based on polypyrrole films

Potentiometric pH miniaturized sensors based on electrosynthesized polypyrrole films were developped. These pH sensors consist in two interdigitated microarray electrodes which were fabricated using photolithography process. One electrode of the sensor is coated by a polypyrrole film while the other one is coated by a silver film used as reference electrode. The potentiometric responses of these sensors were generally linear to pH changes in the range from 2 to 11. More, some sensors appeared to be stable in time during 30 days. The effect of the thickness of polymer film to potentiometric responses was also studied. It appeared that thinner polypyrrole films gave better potentiometric responses than thicker ones

A Novel Conductometric Urea Biosensor with Improved Analytical Characteristic Based on Recombinant Urease Adsorbed on Nanoparticle of Silicalite

Development of a conductometric biosensor for the urea detection has been reported. It was created using a non-typical method of the recombinant urease immobilization via adsorption on nanoporous particles of silicalite. It should be noted that this biosensor has a number of advantages, such as simple and fast performance, the absence of toxic compounds during biosensor preparation, and high reproducibility (RSD = 5.1 %). The linear range of urea determination by using the biosensor was 0.05–15 mM, and a lower limit of urea detection was 20 μM. The bioselective element was found to be stable for 19 days. The characteristics of recombinant urease-based biomembranes, such as dependence of responses on the protein and ion concentrations, were investigated. It is shown that the developed biosensor can be successfully used for the urea analysis during renal dialysis

Elaboration and characterization of carboxylic acid-functionalized polypyrrole films

International audienc

Towards carboxylic acid-functionalized aniline monomers: chemical synthesis, electropolymerization and characterization

International audienc

Preparation of polyelectrolyte-modified membranes for heavy metal ions removal

International audienc

Characterization of charge properties of an ultrafiltration membrane modified by surface grafting of poly(allylamine) hydrochloride

International audienc

Functionalization of organic membranes by polyelectrolyte multilayer assemblies. Application to the removal of copper ions from aqueous solutions

International audienc

Gas sensors based on electrodeposited polymers

International audienc