Fast and sensitive visual detection of Fe2+ using silver nanoparticles modified with 3,3',5,5'-tetramethylbenzidine and 3-mercaptopropionic acid.

In this work, a novel sensitive colorimetric sensor was constructed for the determination of iron(II) (Fe2+) via modifying 3,3',5,5'-tetramethylbenzidine and 3-mercaptopropionic acid on the surface of silver nanoparticles. In the presence of Fe2+, th…

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