MXene based fluorescence sensors: recent advances and future prospects
摘要
MXenes, a family of two-dimensional transition metal carbides and nitrides, have emerged as versatile materials since their discovery in 2011. Although their metallic conductivity and near-zero band gaps limit intrinsic photoluminescence, recent advances have unlocked their fluorescence potential. Downsizing to quantum dots induces strong fluorescence emission via quantum confinement, while broad band absorption on nanosheets generates luminescence quenching. This review examines the applications of the optical properties of MXenes with emphasis on fluorescence sensing. We discuss the recent literature showcasing the synthesis strategies and applications of MXene quanm dots and nanosheets. The growing body of research on MXene-based sensors reflects their promise for addressing challenges across analytical chemistry and diagnostics. Although increase in research in this domain indicates significant progress, studies on the composition, size and surface terminations on the optical properties of MXenes remains insufficient. In addition, irrespective of the constant improvement in sensing performances, translation of the developed strategy into miniaturised point-of-care devices remains severely underdeveloped.
Graphical abstract