Journal
PLASMONICS
Volume 13, Issue 4, Pages 1315-1323Publisher
SPRINGER
DOI: 10.1007/s11468-017-0635-9
Keywords
Gold nanoparticle; Surface plasmon resonance; Nano sensor; Nanoparticles; Colorimetric sensing; Co2+
Funding
- Department of Chemistry, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
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The present work describes simple and green method for the preparation of gold nanoparticles (AuNPs) in aqueous medium under ambient condition and their use in colorimetric detection of cobalt ion. The AuNPs were prepared by an environmentally benign method using glycyrrhizic acid (GA) which is a reducing and stabilizing agent in aqueous medium. The prepared GA-AuNPs were thoroughly characterized by using UV-visible spectroscopy, TEM, TGA, DLS, and FT-IR techniques. The analytical response was linear over the range from 50 mM to 16 mu M (R (2) = 0.971) with a detection limit of 0.4 nM. The proposed diethyldithiocarbamate-AgNPs-based colorimetric method is simple and highly sensitive for the detection of cobalt ions and allows for the monitoring of cobalt ions directly with naked eye in aqueous medium.
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