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Tytuł:
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Fabrication and characterization of chitosan-CeO 2 -CdO nanocomposite based impedimetric humidity sensors.
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Autorzy:
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Chani MTS; Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia. Electronic address: .
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Źródło:
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International journal of biological macromolecules [Int J Biol Macromol] 2022 Jan 01; Vol. 194, pp. 377-383. Date of Electronic Publication: 2021 Nov 18.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Amsterdam : Elsevier
Original Publication: Guildford, Eng., IPC Science and Technology Press.
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MeSH Terms:
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Humidity*
Cadmium Compounds/*chemistry
Cerium/*chemistry
Chitosan/*chemistry
Nanocomposites/*chemistry
Oxides/*chemistry
Chemical Phenomena ; Chemistry Techniques, Synthetic ; Nanocomposites/ultrastructure ; Spectrum Analysis
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Contributed Indexing:
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Keywords: Biomedical devices; Capacitance; Frequency; Impedance; Mechanical mixing; Pressing
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Substance Nomenclature:
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0 (Cadmium Compounds)
0 (Oxides)
0H3KWS8KJ3 (cadmium oxide)
30K4522N6T (Cerium)
619G5K328Y (ceric oxide)
9012-76-4 (Chitosan)
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Entry Date(s):
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Date Created: 20211120 Date Completed: 20220317 Latest Revision: 20220317
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Update Code:
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20240105
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DOI:
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10.1016/j.ijbiomac.2021.11.079
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PMID:
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34800523
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Nanocomposites of chitosan and cerium oxide‑cadmium oxide (CeO 2 -CdO) nanopowder were developed to fabricate impedimetric humidity sensors. The low temperature-stirring was used to synthesize CeO 2 -CdO nanopowder. Average particle size of synthesized nanopowder was 100 ± 20 nm. Various composition of chitosan-CeO 2 -CdO nanocomposites were developed using echo-friendly (mechanical mixing) technique. Pellets of 13.0 mm diameter and 1.0 ± 0.1 mm thickness were prepared using hydraulic press under the pressure of 375 MPa. Silver paste was used to deposit the electrodes; the length of each electrode was 12.0 mm and the gap between two electrodes was 2.0 ± 0.5 mm. The mechanism of sensing is based on impedimetric change in response to humidity variation. Fabricated sensors showed high sensitivities ranging from -930.0 kΩ/%RH to -2091.1 kΩ/%RH. Response and recovery times are up to 1 s, while the humidity sensing range is 5 to 95%RH. The fabricated sensors are very attractive to use in several devices for environmental monitoring and biomedical applications.
(Copyright © 2021. Published by Elsevier B.V.)