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Abstract
The exploitation of accurate and robust photoelectrochemical (PEC) approaches in whole biosensing community counts on the smooth electrons transport and delicate biological design. An aptasensor using depositional rutile titanium dioxide/bismuth vanadate nanoarrays (TiO2/BiVO4 NAs) as photoanode generator and strand-displacement model as nucleic acid frame was developed for microRNA-155 (miRNA-155) detection root in original idea. Photoanode was fabricated via a three-step overlayer deposition procedure including hydrothermal method, electrodeposition and ion beam sputtering. With a sufficient dense of oriented arrays, it provided a solid substrate and fast electronic kinetics reaction during host−guest recognition. In situ yielding electron donors were integrated into the PEC system to provide the most accurate quantitative analysis. The nanoarrays-triggered PEC platform opens another potential perspective in biosensing.
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