“…Poly(metaphosphates), with the general formula [MPO 3 ] n , where M is a metal ion or hydrogen, have been known for a long time,8 but, to our knowledge, they have not been used for the LbL assembly. Thin films from similar components have been prepared with plasma‐electrolytic oxidation 9. Furthermore, different types of well‐ordered phosphate‐metal multilayers have been prepared using zirconium(IV) and small organic bisphosphonates 10.…”