Optical, XPS and XRD Studies of Semiconducting Copper Sulfide Layers on a Polyamide Film

Figure 1

Typical UV/VIS absorption spectra: (1) of the layers of PA 6 sulfured for 5 hours in 0.15 mol⋅dm⁻³K₂S₅O₆ at 20^∘C, (2) of the layers then treated with Cu(I) salt.