Colorimetric detection of Hg2+ based on inhibiting the peroxidase-like activity of DNA–Ag/Pt nanoclusters. Issue 79 (9th August 2016)

• Record Type: Journal Article
• Authors: Wu, Liang-Liang; Wang, Li-Ying; Xie, Zheng-Jun; Xue, Feng; Peng, Chi-Fang
• Is Part Of: RSC advances. Volume 6:Issue 79(2016)
• Page Start: 75384
• Page End: 75389
• Publication Date: 2016-08-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra12597b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This paper reported that the peroxidase-like activity of DNA–Ag/Pt nanoclusters (NCs) can be inhibited selectively by Hg 2+ . Abstract : This paper reported that the peroxidase-like activity of DNA–Ag/Pt nanoclusters (NCs) can be inhibited selectively by Hg 2+ . The interaction between Hg 2+ and the DNA–Ag/Pt NCs was discussed through characterization by TEM, DLS and XPS, etc. It was found that the integration of both Hg 0 and Hg 2+ to the DNA–Ag/Pt NCs resulted in the DNA–Ag/Pt NCs aggregation and the decrease of Pt 2+ content on the DNA–Ag/Pt NCs surface, which finally impaired their catalytic activity. Based on the above mechanism, a colorimetric detection for Hg 2+ was developed with a detection limit (LOD) of 5.0 nM and a linear range from 10 nM to 200 nM. The method was highly selective toward Hg 2+ over other common metal ions, low-cost and simple, which facilitated the application of detecting Hg 2+ in tap water.