NDLI: Ultrasensitive detection of mercury with a novel one-step signal amplified lateral flow strip based on gold nanoparticle-labeled ssDNA recognition and enhancement probes.

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Ultrasensitive detection of mercury with a novel one-step signal amplified lateral flow strip based on gold nanoparticle-labeled ssDNA recognition and enhancement probes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chen, Wei Adeloju, Samuel. B. Zhu, Mengya Deng, Yi Wang, Ying Yao, Li Xue, Feng Wu, Yucheng Zheng, Lei Pan, Daodong
Description	Author Affiliation: Zhu M ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China.); Wang Y ( Department of Materials Science & Chemical Engineering, Ningbo University, Ningbo 315211, PR China.); Deng Y ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China.); Yao L ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China.); B Adeloju S ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China); Pan D ( Department of Materials Science & Chemical Engineering, Ningbo University, Ningbo 315211, PR China.); Xue F ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China.); Wu Y ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China.); Zheng L ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China. Electronic address: lei.zheng@hfut.edu.cn.); Chen W ( School of Biotechnology & Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, PR China. Electronic address: chenweishnu@163.com.)
Abstract	A novel one-step signal amplified lateral flow strip (SA-LFS) is described for direct ultrasensitive and on-site detection of Hg(2+) based on the specific recognition system of thymine-Hg(2+)-thymine using gold nanoparticles (AuNPs) as labeling tags. The signal was also amplified by hybridization induced dual labeling of AuNPs, which increased signal intensity of test line on strips. The presence of both probes on the LFS enabled both sensing and signal amplification to be achieved in a single step. The resulting SA-LFS is capable of rapid and ultrasensitive detection of Hg(2+) with LODs of 0.005 ppb and 0.0015 ppb by visual observation and quantitative analysis, respectively. At least 40-fold improvement in sensitivity of the traditional LFS was achieved through this signal amplification process. The successful application of the method to the determination of Hg(2+) in water sample is reported. The proposed signal amplification process may also be applicable to other LFS-based methods.
ISSN	09565663
Volume Number	61
e-ISSN	18734235
Journal	Biosensors and Bioelectronics
Language	English
Publisher	Elsevier
Publisher Date	2014-11-15
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biosensing Techniques Instrumentation Dna, Single-stranded Chemistry Gold Mercury Analysis Metal Nanoparticles Thymine Water Equipment Design Limit Of Detection Evaluation Studies Journal Article Research Support, Non-u.s. Gov't Discipline Biotechnology
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry

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