A colorimetric assay for measuring iodide using Au at Ag core-shell nanoparticles coupled with Cu2+ - Details

author：

Indexed by：

Scopus

Abstract：

Au　at　Ag　core-shell　nanoparticles　(NPs)　were　synthesized　and　coupled　with　copper　ion　(Cu2+)　for　the　colorimetric　sensing　of　iodide　ion　(I-).　This　assay　relies　on　the　fact　that　the　absorption　spectra　and　the　color　of　metallic　core-shell　NPs　are　sensitive　to　their　chemical　ingredient　and　dimensional　core-to-shell　ratio.　When　I-　was　added　to　the　Au　at　Ag　core-shell　NPs-Cu2+　system/solution,　Cu2+　can　oxidize　I-　into　iodine　(I2),　which　can　further　oxidize　silver　shells　to　form　silver　iodide　(AgI).　The　generated　Au　at　AgI　core-shell　NPs　led　to　color　changes　from　yellow　to　purple,　which　was　utilized　for　the　colorimetric　sensing　of　I-.　The　assay　only　took　10　min　with　a　lowest　detectable　concentration　of　0.5　μM,　and　it　exhibited　excellent　selectivity　for　I-　over　other　common　anions　tested.　Furthermore,　Au　at　Ag　core-shell　NPs-Cu2+　was　embedded　into　agarose　gels　as　inexpensive　and　portable　＂test　strips＂,　which　were　successfully　used　for　the　semi-quantitation　of　I-　in　dried　kelps.　©　2015　Elsevier　B.V.

Keyword：

Agarose gels; Au at Ag core-shell nanoparticles; Colorimetric; Dried kelps; Iodide ion

Community：

[ 1 ] [Zeng, J.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 2 ] [Cao, Y.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 3 ] [Lu, C.-H.]The Key Laboratory of Analysis and Detection Technology for Food Safety of the MOE, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
[ 4 ] [Wang, X.-D.]Karlsruhe Institute of Technology (KIT), Institute for Biological Interfaces (IBG-1), Hermann-von-Helmholtz-Platz, Eggenstein-Leopoldshafen, 76344, Germany
[ 5 ] [Wang, Q.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 6 ] [Wen, C.-Y.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 7 ] [Qu, J.-B.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 8 ] [Yuan, C.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 9 ] [Yan, Z.-F.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China), Qingdao, 266555, China
[ 10 ] [Chen, X.]Department of Chemistry, MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China

Reprint 's Address：

[Zeng, J.]State Key Laboratory of Heavy Oil Processing and College of Science, China University of Petroleum (East China)China

Email：

xmuzjb@163.com

Show more details

Related Keywords：

Source ：

Analytica Chimica Acta

ISSN： 0003-2670

Year： 2015

Volume： 891

Page： 269-276

4 . 7 1 2

JCR@2015

5 . 7 0 0

JCR@2023

ESI HC Threshold：265

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

Affiliated Colleges：

Get Fulltext

DOI Library Discovery Baidu Scholar Search SCOPUS

Type
Departments

All Years Choose Year From to