Single Printing Step Prussian Blue Bulk-Modified Transducers for Oxidase-Based Biosensors
- PMID: 36832015
- PMCID: PMC9953944
- DOI: 10.3390/bios13020250
Single Printing Step Prussian Blue Bulk-Modified Transducers for Oxidase-Based Biosensors
Abstract
We report on hydrogen peroxide sensors made through a single printing step with carbon ink containing catalytically synthesized Prussian blue nanoparticles. Despite their reduced sensitivity, the resulting bulk-modified sensors displayed both a wider linear calibration range (5 × 10-7-1 × 10-3 M) and an approximately four times lower detection limit versus the surface-modified sensors due to the dramatically decreased noise resulting in, on average, a six times higher signal-to-noise ratio. The corresponding glucose and lactate biosensors demonstrated similar and even higher sensitivities compared to those of biosensors based on surface-modified transducers. The biosensors have been validated through analysis of human serum. The decreased time and cost for production of single printing step bulk-modified transducers, as well as their analytical performance characteristics, which are advantageous over conventional surface-modified ones, would be expected to enable their wide use in (bio)sensorics.
Keywords: Prussian blue nanoparticles; biosensors; glucose; hydrogen peroxide; lactate; screen-printed electrodes.
Conflict of interest statement
The authors declare no conflict of interest.
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