Photoaging behavior of 3-D colloidal photonic crystals

• Published in: Journal of colloid and interface science Vol. 393; pp. 66 - 73
• Main Authors: Kim, Mun Ho, Lee, Jong-Jin, Byun, Doo-Jin, Choi, Kil-Yeong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.03.2013; Elsevier
• Subjects: Chain reactions; Chemistry; Colloidal photonic crystal; Colloidal state and disperse state; Colloids; crystals; Exact sciences and technology; Fourier transform infrared spectroscopy; General and physical chemistry; Optical properties; oxygen; photoaging; Photochemistry; Photonic bandgap; Photonic crystals; Photonics; Photooxidation; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); polymers; Polystyrene resins; PS latex; Surface characterization; surface roughness; Three dimensional; X-ray photoelectron spectroscopy; Colloidal photonic crystal; Photonic bandgap; PS latex; Surface characterization; Photooxidation; Characterization; Photonic crystal; Styrene polymer; Latex
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2012.10.041

[Display omitted] ► The photoaging behavior of 3-D colloidal photonic crystals was investigated. ► Photoaging induced morphological changes in the surface of photonic crystal films. ► The deterioration behavior of optical properties during photoaging was discussed. ► Oxygen incorporation behavior to the polymer chain during photoaging was examined. Since most polymers are not inherently stable to light, their photochemical behavior remains a subject of constant interest. In this study, we investigated the photoaging behavior of polymeric colloidal photonic crystal films. As a consequence of photochemical reactions containing chain-scission, photoaging induced morphological changes in the film surface including changes in the size, surface roughness, shape, and packing structure of PS particles. These structural modifications came about the deterioration of optical properties (photonic bandgap) during photoaging. Based on our results and observations, a plausible correlation between the evolutions of the optical properties and the structural modifications during photoaging was established. Finally, the compositional modifications of the surface based on oxygen incorporation behavior caused by the photooxidation process are discussed based on the ATR–FTIR and XPS analyses.