期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 265, 期 -, 页码 155-160出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.03.006
关键词
Printed electronics; Paper-based sensors; Inkjet printing; Electroanalysis; Carbon black; Ascorbic acid
资金
- NanoSWS Project [ERANETMED2-72-328]
- DAAD Salmosens Project [57268170]
- Fondazione Umberto Veronesi
- Fed-Cluster of Excellence MERGE - German Research Foundation (DFG) [EXC1075]
Herein we demonstrated, for the first time, the possibility to use the paper employed in printed electronics (i.e. p_e:smart) as substrate to develop a paper-based sensor. To improve the electrochemical performances of the inkjet-printed sensor, a dispersion based on carbon black nanoparticles was used to modify the working electrode, allowing for a highly performant nanomodified electrochemical sensor platform. This disposable sensor was characterized both electrochemically and morphologically, and it has been successively challenged towards a model analyte namely ascorbic acid. It has been evidenced that the presence of carbon black as nanomodifier decreased the overpotential for ascorbic acid oxidation (from 0.47 V to 0.28 V) with respect to the unmodified sensor and boosted the sensitivity (ca. 3-times). The applicability of this printed electrochemical sensor was demonstrated for the detection of ascorbic acid in a dietary supplement, quantifying 999 +/- 130 mg with respect to the 1000 mg reported on the label. (C) 2018 Elsevier B.V. All rights reserved.
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