Patent ID: 9732427
Date: 2017-08-15
CPC Classifications: B82Y,C23C,Y02T,Y10T

Claim:
1. A composite polymer-nanoporous film, comprising: a nanoporous coating comprising inorganic particles firmly adhered to a surface of a flexible or moldable transparent polymer substrate comprising polyester; said nanoporous coating is a tunable refractive index film on said flexible or moldable polymer substrate and said inorganic particles comprise standing silica nanocolumns arranged in an array on the surface of the polymer substrate; and a transmittance of the composite polymer-nanoporous film over a wavelength range of 400 nm to 1600 nm is altered by less than 1% by a repeated bending of the composite polymer-nanoporous film, wherein the repeated bending comprises bending the composite polymer-nanoporous film around a radius of curvature of 5 mm ten or more times.