OPTICAL MATERIAL AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical material which can vary the peak wavelength of an extinction spectrum due to localized surface plasmon resonance (LSPR) of an aggregate comprising nanoparticles, and to provide a method for producing the optical material.

SOLUTION: The optical material includes an aggregate obtained by aggregating a plurality of metal or alloy nanoparticles each coated with a coating material, and a light transmissive elastomer which is filled between the nanoparticles of the aggregate. The method for producing the optical material includes the steps of: preparing a colloidal suspension solution by coating metal or alloy nanoparticles with the coating material and dispersing the resulting nanoparticles in a solvent; forming the aggregate composed of the nanoparticles by applying the colloidal suspension solution onto substrate to form a liquid film layer of the colloidal suspension solution, then votilizing the solvent in the liquid film layer; and forming the light transmissive elastomer by filling a precursor of the light transmissive elastomer between the nanoparticles and polymerizing the precursor of the light transmissive elastomer.

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