Nanoparticle capsules for photonic crystal color display in magnetic field
AssigneeThe Regents of the University of California
InventorTing Guo
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Abstract
Described are composite photonic materials that incorporate magnetic nanoparticles inside hollow or solvent-filled nano-scale or micro-scale shells and methods of making and using such composite photonic materials. When these photonic materials are present in a magnetic field, they exhibit a change in reflected, scattered, and/or transmitted light as compared to when the materials are not in the presence of the magnetic field. This results in the materials appearing to have a different color, such as when observed by the human eye or a light detecting device, such as a camera.
Claims13
A method of preparing a composite photonic material comprising:
- aggregating a plurality of photonic nanoparticles comprising a magnetic material;
- coating the plurality of photonic nanoparticles with a polymer material;
- forming an oxide material around the coated plurality of photonic nanoparticles;
- and
- removing the polymer material to form a hollow shell comprising the oxide material within which the plurality of photonic nanoparticles are disposed, thereby preparing the composite photonic material.
Dependencies are inferred from the claim text.