Journal
BIOSENSORS & BIOELECTRONICS
Volume 165, Issue -, Pages -Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2020.112428
Keywords
Roll-to-roll; Slot-die deposition; Carbon black; Catechol; Dopamine; Printed biosensors; Electrochemical sensors
Categories
Funding
- CAPES (Brazil) [001]
- INEO (Brazil)
- CNPq (Brazil)
- FAPESP (Brazil) [2013/14262-7, 2019/10693-0]
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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.
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