Fully-printed electrochemical sensors made with flexible screen-printed electrodes modified by roll-to-roll slot-die coating

Author(s)

Cagnani, Giovana Rosso ^[1] ; Ibanez-Redin, Gisela ^[1] ; Tirich, Beatriz ^[1] ; Goncalves, Debora ^[1] ; Balogh, Debora T. ^[1] ; Oliveira Jr, Osvaldo N.

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: BIOSENSORS & BIOELECTRONICS; v. 165, OCT 1 2020.
• Web of Science Citations: 0

Abstract

The manufacture of sensors using large-scale production techniques, such as roll-to-roll (R2R) processing, may fulfill requirements of low-cost disposable devices. Herein, we report the fabrication of fully-printed electrochemical sensors using screen-printed carbon electrodes coated with carbon black inks through slot-die coating within an R2R process. As a proof of concept, sensors were produced to detect the neurotransmitter dopamine with high reproducibility and low limit of detection (0.09 mu mol L-1). Furthermore, fully-printed biosensors made with a tyrosinase-containing ink were used to detect catechol in natural water samples. Since slot-die deposition enables printing enzymes without significant activity loss, the biosensors exhibited high stability over a period of several weeks. Even more important, R2R slot-die coating may be extended to any type of sensors and biosensors with the possibility of large-scale manufacturing. (AU)

• FAPESP's process: 19/10693-0 - Binary metal oxides in biosensors for early diagnosis of cancer
• Grantee: Beatriz Montilha Tirich
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
• Grantee: Osvaldo Novais de Oliveira Junior
• Support Opportunities: Research Projects - Thematic Grants