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A novel and enzyme-free electrochemical aptasensor based on magnetic separation platform was designed for highly sensitive determination of PDGF-BB by virtue of utilizing catalytic activity of silver nanoparticles (AgNPs) towards the reduction of o-nitrophenol (o-NP) to o-aminophenol (o-AP) by NaBH4, and the direct electric readout from the product of electrodeposition of o-AP and multiwalled carbon...
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