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Component reconstitution-driven photoelectrochemical sensor for sensitive detection of Cu2+ based on advanced CuS/CdS p-n junction

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Abstract

The rational design of robust photoactive material and artful sensing strategy are vital for the construction of an ultrasensitive photoelectrochemical (PEC) sensor. Although great progress has been made in PEC sensing, the resultant detection performances and adoptable sensing strategies are still limited. Herein, through the design of a subtle component reconstitution strategy, an ultrasensitive PEC sensor is developed for the detection of Cu2+ based on advanced CuS/CdS nanohybrids (NHs). This proposed sensor shows superior sensing performances with a low detection limit of 0.1 nM and a wide detection range from 0.2 nM to 60 µM due to the formation of p-n junction between CuS and CdS and the component transformation of CdS to CuxS (x = 1,2). Moreover, such PEC sensor also displays goodish results for monitoring the Cu2+ released from apoptotic HeLa cells in vitro. This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21625502), Priority Academic Program Development and Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_1188).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China

    Jing Liu, Ying Liu, Wei Wang, Jing Li, Xinyuan Yu, Qinshu Zhu & Zhihui Dai

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  1. Jing Liu
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  2. Ying Liu
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  3. Wei Wang
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  4. Jing Li
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  5. Xinyuan Yu
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  6. Qinshu Zhu
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  7. Zhihui Dai
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Correspondence to Qinshu Zhu or Zhihui Dai.

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The authors declare that they have no conflict of interest.

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Component reconstitution-driven photoelectrochemical sensor for sensitive detection of Cu2+ based on advanced CuS/CdS p-n junction

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Liu, J., Liu, Y., Wang, W. et al. Component reconstitution-driven photoelectrochemical sensor for sensitive detection of Cu2+ based on advanced CuS/CdS p-n junction. Sci. China Chem. 62, 1725–1731 (2019). https://doi.org/10.1007/s11426-019-9579-2

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  • DOI: https://doi.org/10.1007/s11426-019-9579-2

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