Hello, I made passivation on the Cu tape by just waiting in NaOH, it was necessary to coat it with a film of sulfuric acid and pyrrole monomer. But when an acidic polymer entered the solution, the passivation was gone, that is, it dissolved back. How should I passivation on a Cu tape or Al, in short, a metal surface so that I can produce polymers on it? Are there any publications you can recommend? Thank you