Patent ID: 9513405
Filing Date: 2016-12-06
CPC Classification: B29D,B82Y,G02B,Y10T

Claim Text:
1. A biopolymer photonic crystal, comprising a biopolymer matrix having a nanostructure thereon, wherein the biopolymer matrix is or comprises silk, chitosan, collagen, gelatin, agarose, chitin, polyhydroxyalkanoates, pullan, starch, amylose, amylopectin, cellulose, hyaluronic acid, or combinations thereof, wherein the biopolymer matrix is a biopolymer film, wherein the biopolymer film comprises a surface having a root mean squared (RMS) surface roughness value of between about 2.5 nm and about 5 nm, and wherein the nanostructure is or comprises a periodically repeating structure.