Fig. 7: Complex refractive index variables n and k for heterostructure blocks & computational reflectance spectra.

a MXene-rich block A and (b) polymer-rich block B refractive indices measured using spectroscopic ellipsometry. c Experimental (cyan line) and OpenFilters-generated (magenta line) reflectance spectra of the [(PDADMA/Ti3C2Tz)2/(PDADMA/PSS)4]2.5 heterostructure with 0.5 M NaCl in block B.