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A facile, selective and highly sensitive method is proposed for colorimetric detection of manganese ions using 4-mercaptobenzoic acid (4-MBA) and melamine (MA) modified silver nanoparticles (AgNPs). The presence of Mn 2+ induces the aggregation of AgNPs through cooperative metal–ligand interaction, resulting in a color change from bright yellow to purple. The cofunctionalized AgNPs showed...
A highly sensitive and selective method is proposed for colorimetric detection of copper ions using 4-mercaptobenzoic acid (4-MBA) modified silver nanoparticles (AgNPs). The presence of Cu 2+ induces the aggregation of 4-MBA modified AgNPs, this resulting in a color change from bright yellow to purple. The concentration of Cu 2+ could be quantified by naked eyes or a UV–vis spectrometer...
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