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

doi:10.1039/c7nr05165d

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017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
刊名	NANOSCALE
	2017
卷号	9 期号:37 页码:14184-14191
关键词	Enhanced Raman-scattering Functionalized Gold Nanoparticles Colorimetric Detection Graphene Oxide Silver Nanoparticles Surface-chemistry Dna Coordination Ions Oligonucleotide
ISSN号	2040-3364
DOI	10.1039/c7nr05165d
文献子类	期刊论文
英文摘要	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.
WOS关键词	ENHANCED RAMAN-SCATTERING ; FUNCTIONALIZED GOLD NANOPARTICLES ; COLORIMETRIC DETECTION ; GRAPHENE OXIDE ; SILVER NANOPARTICLES ; SURFACE-CHEMISTRY ; DNA ; COORDINATION ; IONS ; OLIGONUCLEOTIDE
语种	英语
WOS记录号	WOS:000411862400035
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28773]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017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.