A simple assay for ultrasensitive colorimetric detection of Ag+ at picomolar levels using platinum nanoparticles - Details

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Abstract：

In　this　work,　uniformly-dispersed　platinum　nanoparticles　(PtNPs)　were　synthesized　by　a　simple　chemical　reduction　method,　in　which　citric　acid　and　sodium　borohydride　acted　as　a　stabilizer　and　reducer,　respectively.　An　ultrasensitive　colorimetric　sensor　for　the　facile　and　rapid　detection　of　Ag+　ions　was　constructed　based　on　the　peroxidase　mimetic　activities　of　the　obtained　PtNPs,　which　can　catalyze　the　oxidation　of　3,3’,5,5’-tetramethylbenzidine　(TMB)　by　H2O2　to　produce　colored　products.　The　introduced　Ag+　would　be　reduced　to　Ag0　by　the　capped　citric　acid,　and　the　deposition　of　Ag0　on　the　PtNPs　surface,　can　effectively　inhibit　the　peroxidase-mimetic　activity　of　PtNPs.　Through　measuring　the　maximum　absorption　signal　of　oxidized　TMB　at　652　nm,　ultra-low　detection　limits　(7.8　pM)　of　Ag+　can　be　reached.　In　addition　to　such　high　sensitivity,　the　colorimetric　assay　also　displays　excellent　selectivity　for　other　ions　of　interest　and　shows　great　potential　for　the　detection　of　Ag+　in　real　water　samples.　©　2017　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.

Keyword：

Colorimetric sensor; Peroxidase-mimic activity; Platinum nanoparticles; Silver ions detection

Community：

[ 1 ] [Wang, Y.-W.]Key Laboratory of Predictive Microbiology and Chemical Residual Analysis, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
[ 2 ] [Wang, M.]The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Wang, L.]Key Laboratory of Predictive Microbiology and Chemical Residual Analysis, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
[ 4 ] [Xu, H.]Key Laboratory of Predictive Microbiology and Chemical Residual Analysis, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
[ 5 ] [Tang, S.]Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, 350108, China
[ 6 ] [Yang, H.-H.]The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 7 ] [Zhang, L.]The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 8 ] [Song, H.]Key Laboratory of Predictive Microbiology and Chemical Residual Analysis, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China

Reprint 's Address：

[Tang, S.]Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical UniversityChina

Email：

srtang@fjmu.edu.cn

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Source ：

Sensors (Switzerland)

ISSN： 1424-8220

Year： 2017

Issue： 11

Volume： 17

2 . 4 7 5

JCR@2017

3 . 0 3 1

JCR@2018

JCR Journal Grade：2

CAS Journal Grade：3

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 28

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 4

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