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Interface electronic engineering of molybdenum sulfide/MXene hybrids for highly efficient biomimetic sensors

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Abstract

Interface regulation plays a key role in the electrochemical performance for biosensors. By controlling the interfacial interaction, the electronic structure of active species can be adjusted effectively at micro and nano-level, which results in the optimal reaction energy barrier. Herein, we propose an interface electronic engineering scheme to design a strongly coupled 1T phase molybdenum sulfide (1T-MoS2)/MXene hybrids for constructing an efficient electrocatalytic biomimetic sensor. The local electronic and atomic structures of the 1T-MoS2/Ti3C2TX are comprehensively studied by synchrotron radiation-based X-ray photoelectron spectroscopy (XPS), as well as X-ray absorption spectroscopy (XAS) at atomic level. Experiments and theoretical calculations show that there are interfacial stresses, atomic defects and adjustable bond-length between MoS2/MXene nanosheets, which can significantly promote biomolecular adsorption and rapid electron transfer to achieve excellent electrochemical activity and reaction kinetics. The 1T-MoS2/Ti3C2TX modified electrode shows ultra high sensitivity of 1.198 µA/µM for dopamine detection with low limit of 0.05 µM. We anticipate that the interface electronic engineering investigation could provide a basic idea for guiding the exploration of advanced biosensors with high sensitivity and low detection limit.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51872011, 51902011, and 22005013]. The authors thank the BL14W1 in the Shanghai Synchrotron Radiation Facility (SSRF), BL10B and BL12B in the National Synchrotron Radiation Laboratory (NSRL) for help with characterizations.

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  1. Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China

    Pengfei Wu, Tingting You, Qingyuan Ren, Hongyan Xi, Qingqing Liu, Yukun Gao & Penggang Yin

  2. Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    Fengjuan Qin, Hongfei Gu & Wenxing Chen

  3. Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China

    Yu Wang

  4. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China

    Wensheng Yan

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  1. Pengfei Wu
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Wu, P., You, T., Ren, Q. et al. Interface electronic engineering of molybdenum sulfide/MXene hybrids for highly efficient biomimetic sensors. Nano Res. 16, 1158–1164 (2023). https://doi.org/10.1007/s12274-022-5038-3

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