Sensor arrays to detect humic substances and Cu(II) in waters

Abstract The interaction between poly( o -ethoxyaniline) (POEA) adsorbed onto solid substrates and humic substances (HS) and Cu 2+ ions has been investigated using UV–vis spectroscopy and atomic force microscopy (AFM). Both HS and Cu 2+ are able to dope POEA and change film morphology. This interaction was exploited in a sensor array made with nanostructured films of POEA, sulfonated lignin and HS, which could detect small concentrations of HS and Cu 2+ in water.

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