CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Poly-cytosine-mediated nanotags for SERS detection of Hg2+
Qi, L; Xiao, MS; Wang, F; Wang, LH; Ji, W; Man, TT; Aldalbahi, A; Khan, MN; Periyasami, G; Rahaman, M; Alrohaili, A; Qu, XM; Pei, H; Wang, C; Li, L
2017
Source PublicationNANOSCALE
ISSN2040-3364
Volume9Issue:37Pages:14184-14191
Subtype期刊论文
AbstractHighly 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.
KeywordEnhanced Raman-scattering Functionalized Gold Nanoparticles Colorimetric Detection Graphene Oxide Silver Nanoparticles Surface-chemistry Dna Coordination Ions Oligonucleotide
DOI10.1039/c7nr05165d
WOS KeywordENHANCED RAMAN-SCATTERING ; FUNCTIONALIZED GOLD NANOPARTICLES ; COLORIMETRIC DETECTION ; GRAPHENE OXIDE ; SILVER NANOPARTICLES ; SURFACE-CHEMISTRY ; DNA ; COORDINATION ; IONS ; OLIGONUCLEOTIDE
Indexed BySCI
Language英语
WOS IDWOS:000411862400035
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Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28773
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Qi, L,Xiao, MS,Wang, F,et al. Poly-cytosine-mediated nanotags for SERS detection of Hg2+[J]. NANOSCALE,2017,9(37):14184-14191.
APA Qi, L.,Xiao, MS.,Wang, F.,Wang, LH.,Ji, W.,...&Li, L.(2017).Poly-cytosine-mediated nanotags for SERS detection of Hg2+.NANOSCALE,9(37),14184-14191.
MLA Qi, L,et al."Poly-cytosine-mediated nanotags for SERS detection of Hg2+".NANOSCALE 9.37(2017):14184-14191.
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