What question did this study set out to answer?

To develop a wavelength-resolved dual-signal photoelectrochemical biosensor coupled with DNAzyme-assisted cleavage amplification and click chemistry for the simultaneous detection of Pb2+, Mg2+, and Cu2+.

January 23, 2019Analytical Chemistry

Ultrasensitive Photoelectrochemical Detection of Multiple Metal Ions Based on Wavelength-Resolved Dual-Signal Output Triggered by Click Reaction

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Authors

HDHanmei DengSouthwest University LHLiaojing Huang YCYaqin ChaiSouthwest University

Discussion

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Implication

Experimental study demonstrates ultrasensitive triplex metal ion detection using dual-signal photoelectrochemical biosensing, highlighting a versatile platform for diverse multiplexed assays.

Key Points

To develop a wavelength-resolved dual-signal photoelectrochemical biosensor coupled with DNAzyme-assisted cleavage amplification and click chemistry for the simultaneous detection of Pb2+, Mg2+, and Cu2+.
Generated azido-tagged DNA fragments through target-dependent cyclic cleavage mediated by Pb2+- and Mg2+-specific DNAzymes.
Immobilized the fragments onto an alkynyl-DNA-modified electrode via a Cu2+- and ascorbic acid-catalyzed click reaction, followed by hybridization with distinct photoactive nanomaterial tags.
Resolved dual photoelectrochemical current signals at different wavelengths to quantify Pb2+ and Mg2+, while quantifying Cu2+ by evaluating click reaction efficiency via controlled concentration changes.
Achieved picomolar-level limits of detection for all three metal ions (Pb2+, Mg2+, and Cu2+).
Substantially enhanced detection sensitivity by increasing cyclic DNA fragment utilization through the coupled click chemistry and signal-amplifying cascade.

Cite This Study

Deng et al. (2019) studied this question.

synapsesocial.com/papers/6a95a7ed5024d1c8fdcefb13 https://doi.org/10.1021/acs.analchem.8b04831

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January 23, 2019Analytical Chemistry

Ultrasensitive Photoelectrochemical Detection of Multiple Metal Ions Based on Wavelength-Resolved Dual-Signal Output Triggered by Click Reaction

View Full Paper

Ask AI

Bookmark

Authors

HDHanmei DengSouthwest University LHLiaojing Huang YCYaqin ChaiSouthwest University

Discussion

Member takes

Implication

Experimental study demonstrates ultrasensitive triplex metal ion detection using dual-signal photoelectrochemical biosensing, highlighting a versatile platform for diverse multiplexed assays.

Key Points

To develop a wavelength-resolved dual-signal photoelectrochemical biosensor coupled with DNAzyme-assisted cleavage amplification and click chemistry for the simultaneous detection of Pb2+, Mg2+, and Cu2+.
Generated azido-tagged DNA fragments through target-dependent cyclic cleavage mediated by Pb2+- and Mg2+-specific DNAzymes.
Immobilized the fragments onto an alkynyl-DNA-modified electrode via a Cu2+- and ascorbic acid-catalyzed click reaction, followed by hybridization with distinct photoactive nanomaterial tags.
Resolved dual photoelectrochemical current signals at different wavelengths to quantify Pb2+ and Mg2+, while quantifying Cu2+ by evaluating click reaction efficiency via controlled concentration changes.
Achieved picomolar-level limits of detection for all three metal ions (Pb2+, Mg2+, and Cu2+).
Substantially enhanced detection sensitivity by increasing cyclic DNA fragment utilization through the coupled click chemistry and signal-amplifying cascade.

Cite This Study

Deng et al. (2019) studied this question.

synapsesocial.com/papers/6a95a7ed5024d1c8fdcefb13 https://doi.org/10.1021/acs.analchem.8b04831

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