Inorganic/Parylene composite thin film toward 3D robust structures

We report a composite thin film consisting of inorganic calcium carbonate (CaCO₃) crystals and organic Parylene. The CaCO₃ crystals were grown on a surface of poly(vinyl alcohol) (PVA) on Parylene and covered the whole region of organic surface homogeneously. The thickness of CaCO₃ crystals was about 180 nm and that of organic layers of Parylene with PVA was about 2 μm. Importantly, the thin film shows synergistic properties of CaCO₃ crystals and Parylene; the film shows transparency, handleability, shape adjustability and resistivity for fire. Our results indicate that our approach should be useful for harnessing both inorganic and organic properties synergistically.