Fabrication of Rod-Shaped Photonic Structures Using Self-Assembled Colloidal Particles

摘要

In this paper, we propose a simple self-assembly technique to fabricate rectangular rod-shaped photonic structures with micrometer-scale thickness and width using silica nanoparticles. Colloidal nanoparticles were crystallized from the colloidal suspensions injecting the micro-channels with hydrophilic substrates, and then a lot of rectangular rods were rapidly fabricated with relatively low defects by a rotational drying process. The fabricated micro-rods have a specific structural color and a rectangular cross-section where the width is about 1 similar to 2 times larger than the thickness, which is identical to the gap of the micro-channel. As the gap is decreased, the ratio of the width to the thickness of the rectangular rods and the structural irregularity become increasing.