Amperometric Miniaturised Portable Enzymatic Nanobiosensor for the Ultrasensitive Analysis of a Prostate Cancer Biomarker
Journal of Functional Biomaterials, ISSN: 2079-4983, Vol: 14, Issue: 3
2023
- 8Citations
- 19Captures
- 2Mentions
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Most Recent News
Slovak Academy of Sciences Researcher Furthers Understanding of Biosensors (Amperometric Miniaturised Portable Enzymatic Nanobiosensor for the Ultrasensitive Analysis of a Prostate Cancer Biomarker)
2023 APR 04 (NewsRx) -- By a News Reporter-Staff News Editor at Biotech News Daily -- Investigators publish new report on biosensors. According to news
Article Description
Screen-printing technology is a game changer in many fields including electrochemical biosensing. Two-dimensional nanomaterial MXene TiCT was integrated as a nanoplatform to immobilise enzyme sarcosine oxidase (SOx) onto the interface of screen-printed carbon electrodes (SPCEs). A miniaturised, portable, and cost-effective nanobiosensor was constructed using chitosan as a biocompatible glue for the ultrasensitive detection of prostate cancer biomarker sarcosine. The fabricated device was characterised with energy-dispersive X-ray spectroscopy (EDX), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Sarcosine was detected indirectly via the amperometric detection of HO formed during enzymatic reaction. The nanobiosensor could detect sarcosine down to 7.0 nM with a maximal peak current output at 4.10 ± 0.35 × 10 A using only 100 µL of a sample per measurement. The assay run in 100 μL of an electrolyte showed the first linear calibration curve in a concentration window of up to 5 μM with a slope of 2.86 μA·μM, and the second linear calibration curve in the range of 5–50 μM with a slope of 0.32 ± 0.01 μA·μM (R = 0.992). The device provided a high recovery index of 92.5% when measuring an analyte spiked into artificial urine, and could be used for detection of sarcosine in urine for at least a period of 5 weeks after the preparation.
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