Advances and challenges in designing MXene quantum dots for sensors

Abstract MXene quantum dots (MQDs) sensor is a promising platform for identifying target analytes by sensing fluorescence, electrochemical signals, photoluminescence, biomedical, and so on. On the way to designing MQDs in the sensors, substantial progress has been made with basic scientific and technological hurdles remaining. Combining specific functional designs of MQDs with mechanistic understanding provides new research prospects and technology opportunities even at the industrial level. However, MQDs must be able to detect target analytes with higher sensitivity, robust stability, and applied compatibility. Here, we review the recent advances and challenges in the synthetic strategies and rational design of MQDs. By zooming in on several representative examples, we discuss the existing potentials of MQDs in the application of fluorescence, electrochemical luminescence, photoluminescence, colorimetric/fluorescent dual‐mode, and biomedical sensors. Finally, we identify the opportunities and challenges to further understanding of MQDs sensors.

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