ID card (jpg)

Overlaid correlative image showing (A)the optical image, (B) the SEM back-scattered electron image and (C) the Raman image. The Raman image illustrates the chemical composition of the various layers of the polymer laminate as polycarbonate (red), rutile TiO2 (blue), poly[4,4’-methylenebis(phenyl isocyanate)- alt-1,4- butanediol/poly(butylene adipate) (green), copper phthalocyanine (cyan) and polyethylene terephthalate (yellow). There is a clear correlation between all images. Note the cyan layer which is not visible in the SEM or optical image, which highlights the benefits of chemical analysis by Raman spectroscopy.