Jump to main content
Jump to site search

Issue 37, 2017
Previous Article Next Article

Poly-cytosine-mediated nanotags for SERS detection of Hg2+

Author affiliations

Abstract

Highly sensitive and selective detection of heavy metal ions, such as Hg2+, is of great importance because the contamination of heavy metal ions has been a serious threat to human health. Herein, we have developed poly-cytosine (polyC)-mediated surface-enhanced Raman scattering (SERS) nanotags as a sensor system for rapid, selective, and sensitive detection of Hg2+ based on thymidine–Hg2+–thymidine (T–Hg2+–T) coordination and polyC-mediated Raman activity. The SERS nanotags exploit the mismatched T–T base pairs to capture Hg2+ form T–Hg2+–T bridges, which induce the aggregation of nanotags giving rise to the drastic amplification in the SERS signals. Moreover, this polyC not only provides the anchoring function to induce the formation of intrinsic silver–cytosine coordination but also engineers the Raman-activity of SERS nanotags by mediating its length. As a result, the polyC-mediated SERS nanotags show an excellent response for Hg2+ in the concentration range from 0.1 to 1000 nM and good selectivity over other metal ions. Given its simple principle and easy operation, the polyC-mediated SERS nanotags, therefore, could serve as a promising sensor for practical use.

Graphical abstract: Poly-cytosine-mediated nanotags for SERS detection of Hg2+

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Jul 2017, accepted on 31 Aug 2017 and first published on 31 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR05165D
Citation: Nanoscale, 2017,9, 14184-14191
  •   Request permissions

    Poly-cytosine-mediated nanotags for SERS detection of Hg2+

    L. Qi, M. Xiao, F. Wang, L. Wang, W. Ji, T. Man, A. Aldalbahi, M. Naziruddin Khan, G. Periyasami, M. Rahaman, A. Alrohaili, X. Qu, H. Pei, C. Wang and L. Li, Nanoscale, 2017, 9, 14184
    DOI: 10.1039/C7NR05165D

Search articles by author

Spotlight

Advertisements