title: Colloidal photonic crystals with narrow stopbands assembled from low-adhesive superhydrophobic substrates.
abstract: This article presents a facile approach to centimeter-scale colloidal photonic crystals (PCs) with narrow stopbands assembled on low-adhesive superhydrophobic substrates. The full-width-at-half-maxima of the stopbands are just 12 nm. The narrow stopbands of colloidal PCs are ascribed to the combined effects of perfectly ordered assembly structure, large-scale crack elimination, decreased void fraction, and sufficient thickness of the colloidal PCs. These properties result from a self-assembly process on a low-adhesive superhydrophobic substrate. Latex suspension on this substrate displays a receding three-phase contact line during evaporation, which releases tensile stress induced by latex shrinkage and results in complete elimination of cracks in the colloidal PCs. Furthermore, the simultaneous assembly of latex particles on the outermost layer of a spread liquid film contributes to the perfectly ordered assembly structure. This facile fabrication of centimeter-scale colloidal PCs with narrow stopbands will offer significant insights into the design and creation of novel optical devices.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Huang
authors.forename: Jinming
authors.initials: J
authors.lastname: Zhou
authors.forename: Bin
authors.initials: B
authors.lastname: Su
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.forename: Jingxia
authors.initials: J
authors.lastname: Wang
authors.forename: Shuoran
authors.initials: S
authors.lastname: Chen
authors.forename: Libin
authors.initials: L
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zi
authors.forename: Yanlin
authors.initials: Y
authors.lastname: Song
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003460:Crystallization; D057927:Hydrophobic and Hydrophilic Interactions; D010316:Particle Size; D013499:Surface Properties
chemical_list: D003102:Colloids