Fig. 6: CIE 1931 color space plots of structural color of heterostructures.

CIE 1931 color space plots of structural color of heterostructures. Colors of heterostructures with x as indicated plotted in CIE 1931 color space next to photo of films on Si wafer; (a) [(PDADMA/Ti3C2Tz)2/(PDADMA/PSS)2]x with 0.5 M NaCl in block B, (b) [(PDADMA/Ti3C2Tz)2/(PDADMA/PSS)2]x with 1.0 M NaCl in block B, and (c) [(PDADMA/Ti3C2Tz)2/(PDADMA/PSS)4]x with 0.5 M NaCl in block B heterostructures.