Biomimetic modification of silica nanoparticles for highly sensitive and ultrafast detection of DNA and Ag+ ions

Highly sensitive and selective detection of specific DNA or metal ions based on sensor platform of dye-labeled single-stranded DNA (named as ssDNA) and functional materials has attracted great research interest over the past few decades. Herein, we reported for the first time that polydopamine (PDA) modified SiO2 nanoparticles (PDA-co-SiO2 NPs) could be severed as effective fluorescent quenchers for fabrication of fluorescent DNA sensor systems...