Hello everyone, hope you are doing great.

I did drop cast PVC layer consist of: PVC/plasticizer (Dioctyl sebacate (DOS)), Spiropyran and cyclohexanone(as a solvent) on the top of polyaniline in-situ polymerized on the gold surface.

I got the following results for the cross section SEM.

I am wondering what is the the region which indicated with red color in the pictures.

I really appreciate your help.

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