A novel label-free electrochemical sensor for Hg2+ based on the catalytic formation of metal nanoparticle - Details

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Abstract：

A　novel　label-free　electrochemical　sensor　has　been　developed　for　the　highly　sensitive　and　selective　detection　of　Hg2+.　Hg2+　were　first　captured　on　the　modified　electrode　surface　through　the　specific　thymine-Hg2+-thymine　(T-Hg2+-T)　coordination　and　then　through　the　catalytic　HAuCl4/NH2OH　reaction　for　the　formation　of　gold　nanoparticles　(AuNPs)　as　signal　reporter.　The　formed　AuNPs　could　be　directly　detected　by　stripping　voltammetry.　By　the　introduction　of　graphene　to　accelerate　electron　transfer　and　amplify　the　electrochemical　signal,　a　detection　limit　as　low　as　0.06nM　could　be　obtained　for　Hg2+.　Compared　with　the　traditional　metal　nanoparticles　(NPs)-based　method,　this　sensor　avoids　the　labeling　of　the　DNA　probe　with　NP　tags,　only　one　unlabeled　T-rich　DNA　sequence　was　needed,　which　greatly　reduced　the　cost　and　simplified　the　sensing　procedure.　©　2014　Elsevier　B.V.

Keyword：

Electrochemical sensor; Gold nanoparticle; Label-free

Community：

[ 1 ] [Tang, S.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 2 ] [Tong, P.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 3 ] [Tong, P.]Analytical and Testing Center, The Sport Science Research Center, Fuzhou University, Fuzhou, Fujian 350002, China
[ 4 ] [Lu, W.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 5 ] [Chen, J.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 6 ] [Chen, J.]Longyan Entry-Exit Inspection and Quarantine Bureau of P.R.C, Longyan, Fujian 364000, China
[ 7 ] [Yan, Z.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 8 ] [Zhang, L.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
[ 9 ] [Zhang, L.]Analytical and Testing Center, The Sport Science Research Center, Fuzhou University, Fuzhou, Fujian 350002, China

Reprint 's Address：

[Zhang, L.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China

Email：

zlan@fzu.edu.cn

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Source ：

Biosensors and Bioelectronics

ISSN： 0956-5663

Year： 2014

Volume： 59

Page： 1-5

6 . 4 0 9

JCR@2014

1 0 . 7 0 0

JCR@2023

ESI HC Threshold：268

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 55

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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