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Effect of Urea on the Morphology of Fe3O4 Magnetic Nanoparticles and Their Application in Potentiometric Urea Biosensors
King Saud Univ, Saudi Arabia.
COMSATS Inst Informat Technol, Pakistan.
King Saud Univ, Saudi Arabia.
Linköping University, Department of Science and Technology, Physics, Electronics and Mathematics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-6235-7038
2019 (English)In: Silicon, ISSN 1876-990X, E-ISSN 1876-9918, Vol. 11, no 3, p. 1371-1376Article in journal (Refereed) Published
Abstract [en]

The effect of different concentrations of urea on the morphology of iron oxide (Fe3O4) magnetic nanoparticles was studied. Fe3O4 magnetic nanoparticles were fabricated by the coprecipitation method. The morphology, crystallinity, compositional purity, and emission characteristics were tested by the techniques of scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and Raman characterization. The drop-casting technique was successfully used to fabricate a potentiometric urea biosensor producing initially isopropanol and chitosan solution, consisting of Fe3O4 nanoparticles, on a glass fiber filter. To measure the developed biosensors voltage signal from the functionalized nanoparticles, a copper wire was utilized. The Fe3O4 nanoparticle surface functionalization was performed through the electrostatic immobilization of urease with the Fe3O4-chitosan (CH) nanobiocomposite. The presented urea biosensor measured a wide logarithmic range of urea concentration of 0.1-80 mM with a sensitivity of 42 mV/decade, and indicated a fast response time of approximately 12 s. The developed urea biosensor showed enhanced sensitivity, stability, reusability, and specificity. All experimental results demonstrate the application potential of the developed urea sensor for the monitoring of urea concentrations in human serum, drugs, and food industry-related samples.

Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 11, no 3, p. 1371-1376
Keywords [en]
Fe3O4 magnetic nanoparticles; XRD; Raman characterization; Potentiometric urea biosensor
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-159282DOI: 10.1007/s12633-018-9935-8ISI: 000474568500019OAI: oai:DiVA.org:liu-159282DiVA, id: diva2:1341128
Note

Funding Agencies|Deanship of Scientific Research, King Saud University

Available from: 2019-08-07 Created: 2019-08-07 Last updated: 2019-10-12

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CiteExportLink to record
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  • apa
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