Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)
- 2010.08a
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- Pages.278-278
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- 2010
Colloidal Photonic Crystals with Quasi-Amorphous Structure: Angle-Independent Electrically Tunable Full Color Photonic Pixels
- Published : 2010.08.18
Abstract
Electrically tunable photonic band gap (PBG) materials based on crystalline structures have been developed for active components of display. Despite considerable advances, the intrinsic drawbacks of the crystalline PBG materials such as the strong angle dependent hue and difficulty of fabricating defect-free structures in large area have yet to be addressed for their practical applications. Here we report quasi-amorphous colloidal structures exhibiting angle-independent photonic colors in response to the electric stimuli. Moderately polydisperse colloidal Fe3O4@SiO2 nanoparticles dispersed in organic solvents exclusively form quasi-amorphous photonic materials at sufficiently high concentrations (> 30 wt%), and which reversibly reflect incident light in visible region (
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