title: Thermoresponsive wettability of photonic crystals fabricated by core-shell poly(styrene-acrylamide) nano/microspheres.
abstract: The photonic crystals (PCs) films with tunable wettability were fabricated from self-assembly of an amphiphilic latex nano/microspheres poly(styrene-acrylamide) at different temperatures. The results demonstrate that the surface wettability of the PCs film can be tuned from high hydrophilic (CA, 17 degrees) to high hydrophobic (CA, 127.8 degrees) by controlling the assembly temperature from 30 degrees C to 90 degrees C, while the position of the photonic stopbands of the PCs films unchanged virtually. The obvious wettability transition is due to the change of the surface chemical component of the latex spheres, which mainly derives from the phase separation of polymer segments driven toward minimum interfacial energy. The facile method could open new application fields of PCs in diverse environments.
authors.affiliation: College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, PR China.
authors.forename: Yuqi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Loujun
authors.initials: L
authors.lastname: Gao
authors.forename: Liping
authors.initials: L
authors.lastname: Heng
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Wei
authors.forename: Hua
authors.initials: H
authors.lastname: Yang
authors.forename: Qiao
authors.initials: Q
authors.lastname: Wang