Fluorescent nanoswitch based on redox-controlled reversible sulfhydryl functionalized carbon dots for highly sensitive detection of ochratoxin A - Details

author：

Zhan, Y. (Zhan, Y..) ^[1] | Qiu, B. (Qiu, B..) ^[2] | Lin, Z. (Lin, Z..) ^[3] | Guo, L. (Guo, L..) ^[4]

Indexed by：

Scopus

Abstract：

In　this　work,　sulfhydryl　functionalized　carbon　dots　(SH-CDs)　were　synthesized　for　the　first　time　by　a　two-step　hydrothermal　method.　The　sulfhydryl　group　in　SH-CDs　can　be　converted　efficiently　and　reversibly　in　a　few　minutes　under　redox　conditions.　On　this　basis,　ochratoxin　A　(OTA)　induced　hybrid　chain　reaction　amplification　and　alkaline　phosphatase　enzymatic　hydrolysis　to　produce　ascorbic　acid　(AA).　AA　reduced　the　aggregated　SH-CDs,　thereby　realizing　the　dual-mode　rapid　quantitative　analysis　of　the　OTA　concentration　by　measuring　the　changes　in　the　fluorescence　intensity　and　absorbance　of　the　SH-CDs　solution.　The　proposed　sensor　has　a　good　linear　relationship　with　the　OTA　concentration　in　the　range　of　2.0–5.0　nM,　and　the　lowest　detection　limit　is　2.0　nM.　Additionally,　the　visual　color　change　of　the　solution　can　improve　the　simplicity　and　accuracy　of　semi-quantitative　detection　of　OTA　with　the　naked　eye.　In　short,　this　method　has　the　advantages　of　rapidity,　sensitivity,　reversibility　and　visualization.　©　2023　Elsevier　B.V.

Keyword：

Carbon dot Hybrid chain reaction Ochratoxin A Redox Reversible Sulfhydryl group

Community：

[ 1 ] [Zhan, Y.]Jiaxing Key Laboratory of Molecular Recognition and Sensing, College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, China
[ 2 ] [Zhan, Y.]Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Chem, Fudan University, Shanghai, 200433, China
[ 3 ] [Qiu, B.]MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 4 ] [Lin, Z.]MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 5 ] [Guo, L.]Jiaxing Key Laboratory of Molecular Recognition and Sensing, College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, China

Reprint 's Address：

[Zhan, Y.]Jiaxing Key Laboratory of Molecular Recognition and Sensing, China;;[Guo, L.]Jiaxing Key Laboratory of Molecular Recognition and Sensing, China

Email：

yuanjinzhan@fudan.edu.cn |
guolh@zjxu.edu.cn

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Related Keywords：

Fluorescent nanoswitch based on redox-controlled reversible sulfhydryl functionalized carbon dots for highly sensitive detection of ochratoxin A
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Source ：

Sensors and Actuators B: Chemical

ISSN： 0925-4005

Year： 2023

Volume： 385

6 . 3 9 3

JCR@2018

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 3

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 3

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