Colorimetric detection of Cd(II) ions based on di-(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles

a b s t r a c t A sensitive and selective colorimetric Cd 2+ detection method was developed using di-(1H-pyrrol-2yl)methanethione functionalized gold nanoparticles (DP-AuNPs). Aggregation of DP-AuNPs was induced immediately in the presence of Cd 2+ , yielding a color change from red to blue. This Cd 2+ -induced aggre

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