Will coating a glass slide with ZnO nanoparticles from Sigma Aldrich make it birefringent?

I was wondering given the elliptical shape of ZnO nanoparticles, if they are spin coated on a glass slide, would it make it bi-refringent? The spectrum of light i am working on is NIR - 800-900...

19 November 2018 2,373 3 View