Patterned nanoparticle structures
Aspects relate to patterned nanostructures having a feature size not including film thickness of below 5 microns. The patterned nanostructures are made up of nanoparticles having an average particle size of less than 100 nm. A nanoparticle composition, which, in some cases, includes a binder, is applied to a substrate. A patterned mold used in concert with electromagnetic radiation function to manipulate the nanoparticle composition in forming the patterned nanostructure. In some embodiments, the patterned mold nanoimprints a pattern onto the nanoparticle composition and the composition is cured through UV or thermal energy. Three-dimensional patterned nanostructures may be formed. A number of patterned nanostructure layers may be prepared and joined together. In some cases, a patterned nanostructure may be formed as a layer that is releasable from the substrate upon which it is initially formed. Such releasable layers may be arranged to form a three-dimensional patterned nanostructure for suitable applications.
1. An optical device comprising:
a patterned layer, wherein a feature size of the patterned layer is less than or equal to 5 microns, wherein the patterned layer comprises a composition including:
a plurality of nanoparticles, wherein the plurality of nanoparticles have an average particle size of less than 100 nm; and
a binder; and
an atomic layer deposition-deposited coating disposed on the patterned layer, wherein the coating is disposed at least partially within pores of the patterned layer.
2. The optical device of claim 1 , wherein the device has been treated to remove organics.
3. The optical device of claim 1 , wherein a weight percentage of the plurality of nanoparticles in the composition is greater than 70 weight percent.
4. The optical device of claim 1 , wherein the patterned layer is adapted to manipulate electromagnetic radiation.
5. The optical device of claim 1 , wherein the patterned layer has an index of refraction between 1.5 and 3.0.
6. The optical device of claim 1 , wherein the patterned layer is substantially optically transparent at at least one wavelength.
7. The optical device of claim 1 , further comprising an optically transparent substrate, and wherein the patterned layer is disposed on the substrate.
8. The optical device of claim 1 , wherein the patterned layer includes features with an aspect ratio of height to width between or equal to 1.5:1 and 10:1.
9. The optical device of claim 1 , wherein the patterned layer is periodic.