Abstract
We first time compared the synthesis mechanism of gold nanoparticles (AuNPs) in the marine plant extract (MPE) such as sargassum carpophyllum and spirulina and the terrestrial plant extract (TPE) as for rose petal and longan leaf. Also, the different aggregation behaviors and the color changes of AuNPs in MPE and TPE when they met melamine (Mel) were discussed. In the visual color detection of Mel, the color of AuNPs in MPE rapidly turned blue-gray from wine red encountered Mel, but it was still wine red in the TPE. The size and surface composition of AuNPs in MPE and TPE were analyzed by UV–vis, TEM, FTIR, and XPS. Meanwhile, we further clarified the reason why the AuNPs in TPE can’t colorimetric detection of Mel, despite a lot of hydroxyl groups in biomolecules.
Published Version
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