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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:28 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Solid State Physics and Materials Science
Title:
Comparison of different types of semiconducting polymers as sensors for kidney failure
Authors:
Buzatu George(1), Ana-Maria Iordache(2), Stefan Caramizoiu(2), Irina Negut(1,3), Ana-Maria Raduta(1,2), Stefan-Marian Iordache(2), Bogdan Biță(1,3)
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Affiliation:
1) Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania;
2) Optospintronics Department, National Institute of Research and Development for Optoelectronics - INOE 2000, 409 Atomistilor Street, Magurele, 077125, Romania
3) National Institute for Lasers, Plasma and Radiation Physics, 077125 Magurele – Bucharest, Romania;
E-mail
bogdan.bita@fizica.unibuc.ro, stefan.iordache@inoe.ro
Keywords:
sensors, urea, electrochemical investigations, graphene nanoplatelets, semiconducting polymers
Abstract:
n this paper, we report the development of a new urea electrochemical sensor based on semiconducting polymers and graphene nanoplatelets. Pyrrole, aniline, and thiophene each underwent electropolymerization, both simple and in the presence of graphene nanoplatelets on screen-printed substrates. Electropolymerisation of semiconducting polymers in the presence of graphene nanoplatelets was successful, except for aniline. Following the polymerisation process, the sensors underwent a washing and drying procedure before being tested with eight varying concentrations of urea. The artificial saliva system, including dispersed urea, consists of the following components: NaCl, KCl, CaCl2·2H2O, NaH2PO4·2H2O, and Na2S·9H2O, as specified by the Fusayama formulation. We conducted scanning electron microscopy (SEM) analysis on the electropolymerised samples, revealing the uniformity of the polymeric sheets. The electrochemical investigation demonstrated that the sensors utilising polythiophene and graphene, as well as polypyrrole and graphene, could detect urea in samples with a limit of detection (LOD) of 19.99 mg/mL and 13.58 mg/mL, respectively. The sensors are suitable for identifying kidney failure in patients during triage based on their electrochemical response to urea.
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