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• W2504132085 endingPage "965" @default.
• W2504132085 startingPage "958" @default.
• W2504132085 abstract "Herein, integrated with DNAzyme highly specific to metal ions, hemin@reduced graphene oxide (hemin@rGO) functionalized with flower-like MnO2 and hollow AuPd (hAuPd-fMnO2-hemin@rGO) was used as electroactive probe and electrocatalyst to construct a universal platform for metal ion detection (lead ion Pb(2+) as the model). The proposed strategy with generality was mainly based on two aspects. Firstly, the designed probe not only showed high stability and excellent peroxidase-like activity originating from hemin, fMnO2 and hAuPd, but also possessed intrinsic redox performance from hemin, which resulted in the promotion of electron transfer and the enhancement of the response signal readout. Secondly, due to the introduction of Pb(2+), Pb(2+)-dependent DNAzyme bound in the electrode surface could be specifically identified and cleaved by Pb(2+), and the remained fragment (its supplementary sequence is a single-strand DNA S3) captured the nanocomposites S3-hAuPd-fMnO2-hemin@rGO by the hybridization reaction. Therefore, combined the cooperative catalysis of fMnO2, hAuPd and hemin to H2O2 reduction with highly specific interaction of Pb(2+)-dependent DNAzyme, the proposed Pb(2+) biosensor showed significant improvement of electrochemical analytical performance, which was involved in wide dynamic response in the range of 0.1pM-200nM, low detection limit of 0.034pM, high sensitivity and high specificity. This could facilitate the universal strategy to be a promising method for detection of other metal ions, only changing the corresponding DNAzyme specific to them." @default.
• W2504132085 created "2016-08-23" @default.
• W2504132085 creator A5017875386 @default.
• W2504132085 creator A5048848670 @default.
• W2504132085 creator A5088199147 @default.
• W2504132085 date "2016-12-01" @default.
• W2504132085 modified "2023-09-24" @default.
• W2504132085 title "Hemin on graphene nanosheets functionalized with flower-like MnO2 and hollow AuPd for the electrochemical sensing lead ion based on the specific DNAzyme" @default.
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• W2504132085 doi "https://doi.org/10.1016/j.bios.2016.07.111" @default.
• W2504132085 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27498321" @default.
• W2504132085 hasPublicationYear "2016" @default.
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