Prof. Jang Kun Song, Dr. Tianzi Shen, Dr. Seung Ho Hong of the College of Communication and Information, published research about the production of photonic crystals by narrowing spaces between Graphene Oxide particles in colloid solution and precise adjustment of photonic crystals.
The research team observed a sequence of Graphene Oxide particles in Colloid by using fluorescence laser scanning microscopy, and discovered a layer was formed due to the electrical repulsive force between particles, but found that bed structures were not formed. Unlike the theories claiming that a lamellar mesophase is essential to produce photonic crystals, the team proved distinguished photonic crystals can be produced in the nematic phase.
Also, they studied the ways to adjust photonic crystals and successfully demonstrated the color adjustment in them with bottom-up and Top-down technology. This means that drawing color images is possible by putting colloid in the bed structure or combining them, and the result implied that Photonic Crystals derived from 2-dimensional colloid can be applied to flexible electronic paper display, or a paint which can adjust colors.
The research was funded by Samsung Science & Technology Center and the result of the study was published on Aug. 12th at Latest Research Summaries of LPG Asia Materials Online under the subject name of Graphene oxide: crafting a photonic paintbrush.
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