Fig. 1. . The schematic diagram of the flakes of（a）Ti₃C₂T_x，（b）Ti₃C₂T_x-C₈H₁₈，（c）Ti₃C₂T_x-C₁₂H₂₆ MXene.Blue solid-ball：titanium. Grey solid-ball：carbon. White solid-ball：hytrogen. Red solid ball：fluorine. Cyan solid ball：Oxygen.（d）Image of as-fabricated Ti₃C₂T_x，Ti₃C₂T_x-C₈H₁₈，Ti₃C₂T_x-C₁₂H₂₆ MXene thin-film

Fig. 2. （a）The AFM image of the flakes of Ti₃C₂T_x，Ti₃C₂T_x-C₈H₁₈，Ti₃C₂T_x-C₁₂H₂₆ MXene；（b）The surface roughness of corresponding MXene flakes；（c）SEM cross-sections of Ti₃C₂T_x，Ti₃C₂T_x-C₈H₁₈，Ti₃C₂T_x-C₁₂H₂₆ MXene thin-films；（d）TEM image of as-fabricated MXene thin-film

Fig. 3. （a）Transmission spectra（b）reflection spectra（c）absorption spectra of Ti₃C₂T_x，Ti₃C₂T_x-C₈H₁₈，Ti₃C₂T_x-C₁₂H₂₆ MXene.（Red solid-line：Ti₃C₂T_x；MXene；Green solid-line：Ti₃C₂T_x-C₈H₁₈ MXene；Blue solid-line：Ti₃C₂T_x-C₁₂H₂₆ MXene）