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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.)

Reagentless and sub-minute laser-scribing treatment to produce enhanced disposable electrochemical sensors via additive manufacture

Full text
Author(s):
Rocha, Diego P. [1] ; Ataide, Vanessa N. [1] ; de Siervo, Abner [2] ; Gonsalves, Josue M. [1] ; Munoz, Rodrigo A. A. [3] ; Paixa, Thiago R. L. C. [1] ; Angnes, Lucio [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Dept Fundamental Chem, Inst Chem, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Estadual Campinas, Appl Phys Dept, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] Univ Fed Uberlandia, Inst Chem, BR-38400902 Uberlandia, MG - Brazil
Total Affiliations: 3
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 425, DEC 1 2021.
Web of Science Citations: 5
Abstract

3D printing is the most popular form of additive manufacturing, and conductive 3D-printed platforms have been recognized as an emerging class of devices with high potential for electrochemistry. Nevertheless, as-printed electrodes provide poor conductivity due to the presence of high amounts of insulating thermoplastic material, requiring surface post-treatments to enhance their electrochemical performance. Such treatments often employ non-eco-friendly, costly, and time-consuming protocols. In this regard, we propose, for the first time, a sub-minute (around 50 s) and reagentless surface treatment of carbon-black/PLA-based 3D-printed electrodes using a Photo-Thermal approach by a CO2 laser. After the proposed treatment (optimized conditions: the power of 6.2%, the scan rate of 20 mm s-1, and height of 10 mm), a marked improvement in the electrochemical electrode response (current increase and peak-to-peak separation) was achieved towards the detection of catechol, ascorbic and uric acids, paracetamol, hexaammineruthenium(III) chloride, and Ferri/ferrocyanide redox couple. The enhanced simultaneous determination of Cd2+, Pb2+, and Cu2+ was also demonstrated. As a proof-ofconcept, the quantification of the adulterant paracetamol in a real seized cocaine sample was performed using a fully 3D-printed electrochemical system, and a good recovery value of 97.8% was acquired. To explain all the improved results, the electrode was carefully characterized by imaging, spectroscopic and electrochemical techniques. Additionally, the between-measurement % relative standard deviation (%RSD) was 6.8% (n = 12), while the between-device %RSD was 7.5% (n = 6) at the 1 mu mol L-1 paracetamol, indicating adequate manufacturing reproducibility. Thus, the strategies developed here open up new possibilities for applications of carbon-based 3D-printed electrodes in analytical electrochemistry. (AU)

FAPESP's process: 07/08244-5 - Study of the magnetic properties of Pd and PdAu ultrathin films and nanoparticles by using XMCD
Grantee:Abner de Siervo
Support Opportunities: Regular Research Grants
FAPESP's process: 18/14462-0 - Fabrication of electrochemical paper-based device aiming clinical and environmental applications
Grantee:Vanessa Neiva de Ataide
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 07/54829-5 - Electronic and geometric structure of nano-materials: synchrotron radiation studies
Grantee:Richard Landers
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/16896-7 - Development of amperometric and impedimetric sensors based on double hydroxides of nickel and vanadium (alpha-NixV1-x(OH)2) and their nanocomposites with expandable graphite/graphene
Grantee:Josué Martins Gonçalves
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
Grantee:Marco Aurelio Zezzi Arruda
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/08782-1 - Miniaturized and integrated chemical sensors: new fabrication platforms for biological, clinical and environmental applications
Grantee:Mauro Bertotti
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 20/00325-0 - Production of conductive filaments containing carbon nanomaterials and metal nanoparticles for the development of low cost enzymeless electrochemical biosensors via additive manufacturing
Grantee:Diego Pessoa Rocha
Support Opportunities: Scholarships in Brazil - Post-Doctoral