| Summary: | 博士 === 國立中正大學 === 物理所 === 98 === In this thesis, we focus on the fabrication and research of periodic nano- and micro- optical application structures by self-assembly process. The scales of self-assembly in this thesis were classified as three parts. First, in sub- micro scale, the capillary fore play an important role in the self-assembly process. For example, the spheres in solutions, called colloids, are easily aggregated by capillary force in drying process at room temperature. The spheres always self-assemble into close-packed structures, e.g. face-centered cubic crystals. In our experiments, the colloid SiO2 particles are self-assembled into f.c.c. crystals by capillary force. Such crystals are called “artificial opal”, similar the “opal” in nature can be applied as photonic crystals (PCs). Furthermore, due to the more wide open photonic band gap, the inverse opal is fabricated based on opal templates for more useful applications.
In molecular (nano-) scale, the self-assembly can be classified with two types, intra- and inter- molecular self-assembly. In intra- molecular self-assembly, such as protein folding, the structures become stable and regular architectures from random coil polymers. In inter- molecular, such as block copolymers (BCPs) self-assembled with nano- morphologies by phase-separation effect, form a supramolecular from micelle molecules in solution.
In micro- scale, the moistures condense on the solution surface of mixing polystyrene and solvent by evaporation-cooling effect which forms to hexagonal porous, called “Breath Figures” (BFs). The advanced applications in microlens and optical diffuser films from BFs will be discussed
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