Korea Advanced Institute of Science and Technology

Hyundai Motor Company

Kia Motors Corporation

Shin Hyun Kim

Sang Hoon Han

Gun Ho Lee

Seung Man Yang

Chan Ul Jeong

Jong Bin Kim

Tae Soup Shim

Hye Soo Lee

Disclosed are an ink composition including light-absorbing nanoparticles and a photonic crystal structure formed using the same. The ink composition may include inorganic particles; monomer; photoinitiator; and nanoparticles light-absorbing nanoparticles to provide the photonic crystal structure. As consequence, problems such as low color sharpness, which makes photonic crystals visible, and attaining high productivity may be eliminated. Moreover, white scattering can be reduced, and thus a distinctive color can be exhibited even when there is a difference between a reflection angle and an observation angle of light, thereby improving visibility.

Photonic crystal ink composition comprising light-absorbing nanoparticles and photonic crystal structure formed using the same

An identification film and pattern having high transparency and a reflectance spectrum with respect to a particular wavelength and including photonic crystals patterned into a particular shape and an anticounterfeiting product including the same are disclosed. A highly transparent colloidal photonic crystal film is easily manufactured using photocurable colloidal suspensions. Even though a plurality of patterns (including sub-patterns) is formed in plural films, there is no reduction in optical characteristics such as transparency, reflectance spectra, and the like. Thus, a film patterned into a desired shape is manufactured and thus usability thereof is enhanced, and a plurality of reflectance spectra with various wavelength ranges is provided and thus identification capability or security is enhanced.

Identification film and pattern including photonic crystals and anticounterfeiting product including the same

Growing community of inventors

Daejeon, South Korea

Shin Hyun Kim