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Colorimetric Assays for Detection of Cu2+ ion using PunicaGranatum Functionalized Gold and Silver Nanoparticles |
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PP: 75-81 |
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doi:10.18576/ijnc/020302
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Author(s) |
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Gadadhar Barman,
Kalipada Bankura,
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Abstract |
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| Monitoring the levels of potentially toxic metal ions (Cu2+) in aquatic ecosystems is important because of effects of these ions on human health and the environment. Gold nanoparticles (GNPs) and silver nanoparticles (AgNPs) are commonly chosen as sensing materials for their unique size and shape dependent optical properties. In this work, we concentrate on an optical assay of Cu2+ ions using functionalized GNPs and AgNPs. The functionalization of nanoparticles has been produced using Punica granatum extract. The extract acts as reducing and capping agent for the preparation of nanoparticles. The colorimetric method has been applied using GNPs and AgNPs for detection of Cu2+ ions based on changes in absorbance resulting metal ion-induced aggregation of nanoparticles. The enhancement property of GNPs and AgNPs has been employed to study the turn on fluorescence approaches for detection of Cu2+ ions. The strong binding of the Cu2+ metal ion with chelating ligand facilitates the aggregation of metal nanoparticles. |
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