Influence of filament aging and conductive additive in 3D printed sensors

Autor(es)

Kalinke, Cristiane ^[1] ; de Oliveira, Paulo Roberto ^[2] ; Neumsteir, Naile Vacilotto ^[1] ; Henriques, Brunna Ferri ^[2] ; Aparecido, Gabriel de Oliveira ^[1] ; Loureiro, Hugo Campos ^[1] ; Janegitz, Bruno Campos ^[2] ; Bonacin, Juliano Alves ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Inst Chem, BR-13083859 Campinas, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Analytica Chimica Acta; v. 1191, JAN 25 2022.
• Citações Web of Science: 0

Resumo

3D printing technology combined with electrochemical techniques have allowed the development of versatile and low-cost devices. However, some aspects need to be considered for the good quality and useful life of the sensors. In this work, we have demonstrated herein that the filament aging, the conductive material, and the activation processes (post-treatments) can influence the surface characteristics and the electrochemical performance of the 3D printed sensors. Commercial filaments and 3D printed sensors were morphologically, thermally, and electrochemically analyzed. The activated graphene-based (Black Magic (R)) sensor showed the best electrochemical response, compared to the carbon black-filament (Proto-Pasta (R)). In addition, we have proven that filament aging harms the performance of the sensors since the electrodes produced with three years old filament had a considerably lower intra-days reproducibility. Finally, the activated graphene-based sensor has shown the best performance for the electrochemical detection of bisphenol A, demonstrating the importance of evaluating and control the characteristics and quality of filaments to improve the mechanical, conductive, and electrochemical performance of 3D printed sensors. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 19/00473-2 - Desenvolvimento de biossensores eletroquímicos impressos em 3 dimensões (3D) com polímero PLA e grafeno para a determinação de biomoléculas e diagnóstico de doenças
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