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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Silver Inkjet-Printed Electrode on Paper for Electrochemical Sensing of Paraquat

Full text
Author(s):
Deroco, Patricia Batista [1] ; Wachholz Junior, Dagwin [1] ; Kubota, Lauro Tatsuo [1]
Total Authors: 3
Affiliation:
[1] Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas - Brazil
Total Affiliations: 1
Document type: Journal article
Source: CHEMOSENSORS; v. 9, n. 4 APR 2021.
Web of Science Citations: 0
Abstract

The use of fully printed electrochemical devices has gained more attention for the monitoring of clinical, food, and environmental analytes due to their low cost, great reproducibility, and versatility characteristics, serving as an important technology for commercial application. Therefore, a paper-based inkjet-printed electrochemical system is proposed as a cost-effective analytical detection tool for paraquat. Chromatographic paper was used as the printing substrate due its sustainable and disposable characteristics, and an inkjet-printing system deposited the conductive silver ink with no further modification on the paper surface, providing a three-electrode system. The printed electrodes were characterized with scanning electron microscopy, cyclic voltammetry, and chronopotentiometry. The proposed sensor exhibited a large surface area, providing a powerful tool for paraquat detection due to its higher analytical signal. For the detection of paraquat, square-wave voltammetry was used, and the results showed a linear response range of 3.0-100 mu M and a detection limit of 0.80 mu M, along with the high repeatability and disposability of the sensor. The prepared sensors were also sufficiently selective against interference, and high accuracy (recovery range = 96.7-113%) was obtained when applied to samples (water, human serum, and orange juice), showing the promising applicability of fully printed electrodes for electrochemical monitoring. (AU)

FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
Grantee:Lauro Tatsuo Kubota
Support Opportunities: Research Projects - Thematic Grants