Back to Search
Start Over
Highly selective and sensitive visualizable detection of Hg2+ based on anti-aggregation of gold nanoparticles
- Source :
-
Talanta . Apr2011, Vol. 84 Issue 2, p508-512. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: For the widely used gold nanoparticles (AuNPs)-based colorimetric probes, AuNPs generally change from dispersion to aggregation state accompanying with corresponding color turning from red to blue. Although colorimetric probes based on the anti-aggregation of AuNPs show exceptional selectivity and sensitivity, few examples have been reported in literature. A facile but highly sensitive and selective colorimetric probe based on the anti-aggregation of AuNPs transferred from the deactivation of aggregation agent 4,4′-dipyridyl by Hg2+ was developed in this work. This reported probe is suitable for real-time detection of Hg2+ in water with a detection limit of 3.0ppb for Hg2+, and exhibits a selectivity toward Hg2+ by two orders of magnitude over other metal ions. The dynamic range of this probe can be conveniently tuned by adjusting the amount of 4,4′-dipyridyl used. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 84
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 59169993
- Full Text :
- https://doi.org/10.1016/j.talanta.2011.01.037