Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Pure, mixed and doped metal oxides (MOX) have attracted great interest for the development of electrical and electrochemical sensors since they are cheaper, faster, easier to operate and capable of online analysis and real-time identification. This review focuses on highly sensitive chemoresistive t...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2021-04, Vol.21 (7), p.2494
Main Authors: Fazio, Enza, Spadaro, Salvatore, Corsaro, Carmelo, Neri, Giulia, Leonardi, Salvatore Gianluca, Neri, Fortunato, Lavanya, Nehru, Sekar, Chinnathambi, Donato, Nicola, Neri, Giovanni
Format: Article
Language:English
Subjects:
biosensing
Biosensors
Carbon
Chemical sensors
Chromatography
conductometric sensors
Dopamine
electrochemical sensors
Electrodes
Epinephrine
gas sensing
Gases
Glassy carbon
Metal oxides
metal-oxide
Nanocomposites
nanohybrid
Nanomaterials
Nitrogen dioxide
Pollution control
Pollution monitoring
Review
Sensors
Serotonin
Severe acute respiratory syndrome coronavirus 2
Tin dioxide
VOCs
Volatile organic compounds
Zinc oxide
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Summary:Pure, mixed and doped metal oxides (MOX) have attracted great interest for the development of electrical and electrochemical sensors since they are cheaper, faster, easier to operate and capable of online analysis and real-time identification. This review focuses on highly sensitive chemoresistive type sensors based on doped-SnO , RhO, ZnO-Ca, Sm -CoFe O semiconductors used to detect toxic gases (H , CO, NO ) and volatile organic compounds (VOCs) (e.g., acetone, ethanol) in monitoring of gaseous markers in the breath of patients with specific pathologies and for environmental pollution control. Interesting results about the monitoring of biochemical substances as dopamine, epinephrine, serotonin and glucose have been also reported using electrochemical sensors based on hybrid MOX nanocomposite modified glassy carbon and screen-printed carbon electrodes. The fundamental sensing mechanisms and commercial limitations of the MOX-based electrical and electrochemical sensors are discussed providing research directions to bridge the existing gap between new sensing concepts and real-world analytical applications.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21072494