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US 10,092,487 B2Granted
Plasmonic enhancement of absorption in sunscreen applications
AssigneeInternational Business Machines Corporation
InventorsTalia S. Gershon, Yun Seog Lee, Ning Li, Devendra Sadana, Teodor K. Todorov
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Abstract
Zinc oxide compositions as well as techniques for plasmonic enhancement of absorption in sunscreen applications are provided herein. A method includes selecting one or more metal particles to be used in conjunction with one or more zinc oxide particles in a sunscreen composition, wherein said selecting is based on the plasmon resonance frequency associated with each of the metal particles; and embedding the one or more selected metal particles into each of the one or more zinc oxide particles.
Claims1
A sunscreen composition comprising:
- multiple zinc oxide particles suspended within a silicon dioxide particle, wherein each of the zinc oxide particles is between approximately 100 nanometers and approximately 400 nanometers in diameter, and wherein the silicon dioxide particle is between approximately 0.8 micrometers and approximately 2 micrometers in diameter;
- and
- nine silver particles embedded into each of the multiple zinc oxide particles, wherein each of the nine silver particles is between approximately 10 nanometers and approximately 30 nanometers in diameter, and wherein the nine silver particles are physically separated within each of the zinc oxide particles by a distance of between approximately 100 nanometers and approximately 200 nanometers between each of the silver particles.
Dependencies are inferred from the claim text.