All-nanoparticle concave diffraction grating fabricated by self-assembly onto magnetically-recorded templates
AssigneeUniversity of South Carolina
InventorsThomas M. Crawford, Longfei Ye, Jason Ryan Henderson
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Abstract
Methods for magnetic recording are provided. The method can include: assembling a plurality of nanoparticles into a pattern on a disc; applying a polymer composition onto the pattern of nanoparticles; curing the polymer composition to form a polymer film on the disc, wherein the plurality of nanoparticles are immobilized in the pattern within the polymer film upon curing; and removing the polymer film containing the plurality of nanoparticles in the pattern. Diffraction gratings are also provided that can include a polymeric film comprising a plurality of nanoparticles immobilized in a pattern, wherein the polymer film defines a curvature.
Claims16
A method for magnetic recording, comprising:
- depositing a solution onto a surface of a magnetic disc medium, the magnetic disc medium comprising magnetic field gradients near the surface, the solution comprising a plurality of magnetic nanoparticles, the magnetic nanoparticles self-assembling upon the deposition into a pattern on the disc, the magnetic field gradients near the surface of the magnetic disc medium determining the pattern of the magnetic nanoparticles;
- applying a uniform external magnetic field to the magnetic disc medium during nanoparticle self-assembly;
- applying a polymer composition onto the magnetic nanoparticles;
- curing the polymer composition to form a polymer film on the disc, wherein the plurality of magnetic nanoparticles are immobilized in the pattern within the polymer film upon curing to form a diffraction grating;
- and
- removing the polymer film containing the plurality of magnetic nanoparticles in the pattern, wherein the polymer film defines a curvature, wherein the diffraction grating is concave.
Dependencies are inferred from the claim text.