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Microchimica Acta

, Volume 183, Issue 10, pp 2705–2711 | Cite as

Aptasensor for ATP based on analyte-induced dissociation of ferrocene-aptamer conjugates from manganese dioxide nanosheets on a screen-printed carbon electrode

  • Dianping TangEmail author
  • Li Hou
Original Paper

Abstract

The authors report on a new electrochemical aptasensing strategy for the determination of adenosine - 5’-triphosphate (ATP) at picomolar levels. First, manganese dioxide (MnO2) nanosheets with an average size of ~70 nm were synthesized via a hot-injection method on the basis of reaction between potassium permanganate and the cationic detergent cetyltrimethylammonium bromide. The resulting MnO2 nanosheets were then immobilized onto a pretreated screen-printed carbon electrode which readily binds the ferrocene-labeled ATP aptamer through the van der Waals force between the nucleobases and the basal plane of the nanoflakes. The immobilized ferrocene-aptamer conjugates activates the electrical contact with the electrode and produces a strong signal in the potentials scanned (0.0 to 1.0 V vs. Ag/AgCl). Upon addition of ATP, it will react with the aptamer and cause the dissociation of the ferrocene-aptamer from the nanosheets, this resulting in a decrease in the electrical signal. Under optimal conditions, this platform exhibits a detection limit as low as 0.32 nM of ATP. The repeatability and intermediate precision is below 10.7 % at a 10 nM concentration level. The method was applied to analyze blank fetal calf serum spiked with ATP, and the recoveries (at 3 concentration levels) ranged between 91.3 and 118 %. This detection scheme is rapid, simple, cost-effective, and does not require extensive sample preparation or multiple washing steps.

Graphic abstract

MnO2 nanosheets are used as the sensing platform for electrochemical detection of ATP based on target-induced dissociation of ferrocene-labeled aptamer.

Keywords

Two-dimensional nanosheets Potential cycling Electrochemical label Square-wave voltammetry Analyte-induced dissociation Bioconjugation Transmission electron microscopy Scanning electron microscopy Raman spectroscopy 

Notes

Acknowledgments

Support by the National Natural Science Foundation of China (41176079 & 21475025), the People’s Livelihood Science and Technology Innovation Project of Chongqing City (cstc2016shmszx20001), and the Advanced Natural Science Foundation of Chongqing City (cstc2015jcyjBX0126) is gratefully acknowledged.

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2016_1916_MOESM1_ESM.doc (697 kb)
ESM 1 (DOC 697 kb)

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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  1. 1.Chongqing Key Laboratory of Environmental Materials & Remediation TechnologiesChongqing University of Arts and SciencesChongqingPeople’s Republic of China
  2. 2.MOE Key Laboratory of Analysis and Detection for Food Safety, Institute of Nanomedicine and Nanobiosensing, Department of ChemistryFuzhou UniversityFuzhouPeople’s Republic of China

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