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
发表期刊NANOSCALE
ISSN2040-3364
卷号9期号:37页码:14184-14191
文章类型期刊论文
摘要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.
关键词Enhanced Raman-scattering Functionalized Gold Nanoparticles Colorimetric Detection Graphene Oxide Silver Nanoparticles Surface-chemistry Dna Coordination Ions Oligonucleotide
DOI10.1039/c7nr05165d
关键词[WOS]ENHANCED RAMAN-SCATTERING ; FUNCTIONALIZED GOLD NANOPARTICLES ; COLORIMETRIC DETECTION ; GRAPHENE OXIDE ; SILVER NANOPARTICLES ; SURFACE-CHEMISTRY ; DNA ; COORDINATION ; IONS ; OLIGONUCLEOTIDE
收录类别SCI
语种英语
WOS记录号WOS:000411862400035
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28773
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
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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